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4.0

Jun 30, 2018
06/18

by
Rui Wu; Vinod Prabhakaran; Pramod Viswanath; Yi Wang

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The performance gain by allowing half-duplex source cooperation is studied for Gaussian interference channels. The source cooperation is {\em in-band}, meaning that each source can listen to the other source's transmission, but there is no independent (or orthogonal) channel between the sources. The half-duplex constraint supposes that at each time instant the sources can either transmit or listen, but not do both. Our main result is a characterization of the sum capacity when the cooperation...

Topics: Mathematics, Computing Research Repository, Information Theory

Source: http://arxiv.org/abs/1402.0898

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4.0

Jun 29, 2018
06/18

by
Yi Wang; Alden Fan; Giuliana Fiorillo; Cristiano Galbiati; Meng-Yun Guan; George Korga; Emilija Pantic; Alessandro Razeto; Andrew Renshaw; Biagio Rossi; Yury Suvorov; Hanguo Wang; Chang-Gen Yang

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Rare event search experiments, such as those searching for dark matter and observations of neutrinoless double beta decay, require ultra low levels of radioactive background for unmistakable identification. In order to reduce the radioactive backgrounds of detectors used in these types of event searches, low background photosensors are required, as the physical size of these detectors become increasing larger, and hence the number of such photosensors used also increases rapidly. Considering...

Topics: High Energy Physics - Experiment, Physics, Instrumentation and Detectors

Source: http://arxiv.org/abs/1611.04713

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5.0

Jun 29, 2018
06/18

by
Katsuyuki Haneda; Lei Tian; Henrik Asplund; Jian Li; Yi Wang; David Steer; Clara Li; Tommaso Balercia; Sunguk Lee; YoungSuk Kim; Amitava Ghosh; Timothy Thomas; Takehiro Nakamura; Yuichi Kakishima; Tetsuro Imai; Haralabos Papadopoulas; Theodore S. Rappaport; George R. MacCartney; Mathew K. Samimi; Shu Sun; Ozge Koymen; Sooyoung Hur; Jeongho Park; Charlie Zhang; Evangelos Mellios; Andreas F. Molisch; Saeed S. Ghassamzadah; Arun Ghosh

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Future mobile communications systems are likely to be very different to those of today with new service innovations driven by increasing data traffic demand, increasing processing power of smart devices and new innovative applications. To meet these service demands the telecommunications industry is converging on a common set of 5G requirements which includes network speeds as high as 10 Gbps, cell edge rate greater than 100 Mbps, and latency of less than 1 msec. To reach these 5G requirements...

Topics: Information Theory, Computing Research Repository, Mathematics

Source: http://arxiv.org/abs/1603.04079

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69

Jul 20, 2013
07/13

by
Yi Wang

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Temporary domain walls are produced during the bifurcation era of multi-stream inflation. The observational effects from such a domain wall to inflationary perturbations are calculated. A domain wall induces a preferred direction in the sky, affecting the angular distribution of perturbations. A correlated suppression of multipoles together with an alignment of multipole moments on the preferred direction are generated. Other observational aspects of multi-stream inflation, including...

Source: http://arxiv.org/abs/1304.0599v1

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2.0

Jun 30, 2018
06/18

by
Zhixin Yang; G. Yin; Le Yi Wang; Hongwei Zhang

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Although the mean-variance control was initially formulated for financial portfolio management problems in which one wants to maximize expected return and control the risk, our motivations also stem from highway vehicle platoon controls that aim to maximize highway utility while ensuring zero accident. This paper develops near-optimal mean-variance controls of switching diffusion systems. To reduce the computational complexity, with motivations from earlier work on singularly perturbed...

Topics: Mathematics, Optimization and Control

Source: http://arxiv.org/abs/1401.4476

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2.0

Jun 30, 2018
06/18

by
Hong-tao Feng; Feng-yao Hou; Yong-hui Xia; Jun-yi Wang; Hong-shi Zong

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Based on the truncated Dyson-Schwinger equations for fermion and massive boson propagators in QED$_3$, the fermion chiral condensate and the mass singularities of the fermion propagator via the Schwinger function are investigated. It is shown that the critical point of chiral phase transition is apparently different from that of deconfinement phase transition and in Nambu phase the fermion is confined only for small gauge boson mass.

Topic: High Energy Physics - Phenomenology

Source: http://arxiv.org/abs/1402.2719

2
2.0

Jun 29, 2018
06/18

by
Xingang Chen; Yi Wang; Zhong-Zhi Xianyu

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We calculate 1-loop corrections to the Schwinger-Keldysh propagators of Standard-Model-like fields of spin-0, 1/2, and 1, with all renormalizable interactions during inflation. We pay special attention to the late-time divergences of loop corrections, and show that the divergences can be resummed into finite results in the late-time limit using dynamical renormalization group method. This is our first step toward studying both the standard model and new physics in the primordial universe.

Topics: High Energy Physics - Theory, Astrophysics, High Energy Physics - Phenomenology, Cosmology and...

Source: http://arxiv.org/abs/1604.07841

2
2.0

Jun 28, 2018
06/18

by
Ge Chen; Le Yi Wang; Chen Chen; George Yin

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Consensus conditions and convergence speeds are crucial for distributed consensus algorithms of networked systems. Based on a basic first-order average-consensus protocol with time-varying topologies and additive noises, this paper first investigates its critical consensus condition on network topology by stochastic approximation frameworks. A new joint-connectivity condition called extensible joint-connectivity that contains a parameter $\delta$ (termed the extensible exponent) is proposed....

Topics: Optimization and Control, Mathematics

Source: http://arxiv.org/abs/1510.07021

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2.0

Jun 28, 2018
06/18

by
Ronald G. Douglas; Yi Wang

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In this paper we introduce techniques from complex harmonic analysis to prove a weaker version of the Geometric Arveson-Douglas Conjecture for complex analytic subsets that is smooth on the boundary of the unit ball and intersects transversally with it. In fact, we prove that the projection operator onto the corresponding quotient module is in the Toeplitz algebra $\mathcal{T}(L^{\infty})$, which implies the essential normality of the quotient module. Combining some other techniques we actually...

Topics: Functional Analysis, Operator Algebras, Mathematics

Source: http://arxiv.org/abs/1511.00782

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11

Jun 27, 2018
06/18

by
Yinwei Li; Yanchao Wang; Chris J. Pickard; Richard J. Needs; Yi Wang; Yanming Ma

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Alkali metals exhibit unexpected structures and electronic behavior at high pressures. Compression of metallic sodium (Na) to 200 GPa leads to the stability of a wide-band-gap insulator with the double hexagonal hP4 structure. Post-hP4 structures remain unexplored, but they are important for addressing the question of the pressure at which Na reverts to a metal. Here we report the reentrant metallicity of Na at the very high pressure of 15.5 terapascal (TPa), predicted using first-principles...

Topics: Condensed Matter, Materials Science

Source: http://arxiv.org/abs/1503.01289

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5.0

Jun 28, 2018
06/18

by
Dario Amodei; Rishita Anubhai; Eric Battenberg; Carl Case; Jared Casper; Bryan Catanzaro; Jingdong Chen; Mike Chrzanowski; Adam Coates; Greg Diamos; Erich Elsen; Jesse Engel; Linxi Fan; Christopher Fougner; Tony Han; Awni Hannun; Billy Jun; Patrick LeGresley; Libby Lin; Sharan Narang; Andrew Ng; Sherjil Ozair; Ryan Prenger; Jonathan Raiman; Sanjeev Satheesh; David Seetapun; Shubho Sengupta; Yi Wang; Zhiqian Wang; Chong Wang; Bo Xiao; Dani Yogatama; Jun Zhan; Zhenyao Zhu

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We show that an end-to-end deep learning approach can be used to recognize either English or Mandarin Chinese speech--two vastly different languages. Because it replaces entire pipelines of hand-engineered components with neural networks, end-to-end learning allows us to handle a diverse variety of speech including noisy environments, accents and different languages. Key to our approach is our application of HPC techniques, resulting in a 7x speedup over our previous system. Because of this...

Topics: Computation and Language, Computing Research Repository

Source: http://arxiv.org/abs/1512.02595

2
2.0

Jun 29, 2018
06/18

by
Yannick Sire; Yi Wang

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In this paper, we prove several Poincar\'e inequalities of fractional type on conformally flat manifolds with finite total Q-curvature. This shows a new aspect of the $Q$-curvature on noncompact complete manifolds.

Topics: Differential Geometry, Mathematics

Source: http://arxiv.org/abs/1601.00100

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2.0

Jun 29, 2018
06/18

by
Sung Hoon Lim; Chien-Yi Wang; Michael Gastpar

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In this paper, we consider a cache aided network in which each user is assumed to have individual caches, while upon users' requests, an update message is sent though a common link to all users. First, we formulate a general information theoretic setting that represents the database as a discrete memoryless source, and the users' requests as side information that is available everywhere except at the cache encoder. The decoders' objective is to recover a function of the source and the side...

Topics: Information Theory, Computing Research Repository, Mathematics

Source: http://arxiv.org/abs/1604.02333

3
3.0

Jun 30, 2018
06/18

by
Xingang Chen; Yi Wang; Zhong-Zhi Xianyu

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We present a systematic introduction to the diagrammatic method for practical calculations in inflationary cosmology, based on Schwinger-Keldysh path integral formalism. We show in particular that the diagrammatic rules can be derived directly from a classical Lagrangian even in the presence of derivative couplings. Furthermore, we use quasi-single-field inflation as an example to show how this formalism, combined with the trick of mixed propagator, can significantly simplify the calculation of...

Topics: High Energy Physics - Theory, High Energy Physics - Phenomenology, Cosmology and Nongalactic...

Source: http://arxiv.org/abs/1703.10166

3
3.0

Jun 27, 2018
06/18

by
Feimin Huang; Yi Wang; Yong Wang; Tong Yang

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Under the diffusion scaling and a scaling assumption on the microscopic component, a non-classical fluid dynamic system was derived in \cite{BGLY} that is related to the system of ghost effect derived in \cite{Sone-2} in different settings. This paper aims to justify this limit system for a non-trivial background profile with slab symmetry. The result reveals not only the diffusion phenomena in the temperature and density, but also the flow of higher order in Knudsen number due to the gradient...

Topics: Analysis of PDEs, Mathematics

Source: http://arxiv.org/abs/1505.02258

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4.0

Jun 29, 2018
06/18

by
Feimin Huang; Tian-Yi Wang; Yong Wang

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The low Mach limit for 1D non-isentropic compressible Navier-Stokes flow, whose density and temperature have different asymptotic states at infinity, is rigorously justified. The problems are considered on both well-prepared and ill-prepared data. For the well-prepared data, the solutions of compressible Navier-Stokes equations are shown to converge to a nonlinear diffusion wave solution globally in time as Mach number goes to zero when the difference between the states at $\pm\infty$ is...

Topics: Analysis of PDEs, Mathematics

Source: http://arxiv.org/abs/1603.07379

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34

Sep 18, 2013
09/13

by
Quansen Jiu; Yi Wang; Zhouping Xin

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In this paper, we prove the global well-posedness of the classical solution to the 2D Cauchy problem of the compressible Navier-Stokes equations with arbitrarily large initial data when the shear viscosity $\mu$ is a positive constant and the bulk viscosity $\l(\r)=\r^\b$ with $\b>\frac43$. Here the initial density keeps a non-vacuum states $\bar\rho>0$ at far fields and our results generalize the ones by Vaigant-Kazhikhov [41] for the periodic problem and by Jiu-Wang-Xin [26] and...

Source: http://arxiv.org/abs/1209.0157v1

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4.0

Jun 30, 2018
06/18

by
Yi Wang; Yin-Zhe Ma

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Recently the second phase of Background Imaging of Cosmic Extragalactic Polarization (BICEP2) claimed a detection of the tensor-to-scalar ratio ($r$) of primordial fluctuation at $5\sigma$ confidence level. If it is true, this large and measurable amplitude ($r \simeq 0.2$) of B-mode polarization indicates that it is possible to measure the shape of CMB B-mode polarization with future experiments. We forecast the precision of $r$ and the tensor spectral index $n_{\rm t}$ measurements, with...

Topics: High Energy Physics - Theory, High Energy Physics - Phenomenology, Astrophysics, Cosmology and...

Source: http://arxiv.org/abs/1406.1615

2
2.0

Jun 30, 2018
06/18

by
Wenxian Shen; Yi Wang; Dun Zhou

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We study topological structure of the $\omega$-limit sets of the skew-product semiflow generated by the following scalar reaction-diffusion equation \begin{equation*} u_{t}=u_{xx}+f(t,u,u_{x}),\,\,t>0,\,x\in S^{1}=\mathbb{R}/2\pi \mathbb{Z}, \end{equation*} where $f(t,u,u_x)$ is $C^2$-admissible with time-recurrent structure including almost-periodicity and almost-automorphy. Contrary to the time-periodic cases (for which any $\omega$-limit set can be imbedded into a periodically forced...

Topics: Dynamical Systems, Analysis of PDEs, Mathematics

Source: http://arxiv.org/abs/1701.07131

2
2.0

Jun 30, 2018
06/18

by
Razieh Emami; Hassan Firouzjahi; Yi Wang

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We examine the recent proposal [1] that the anti-cross-correlation of the scalar and tensor primordial fluctuations reconciles the tension between BICEP2 and Planck observations. We show that unfortunately the contribution from the scalar-tensor correlation to the CMB temperature power spectrum vanishes once summed over the angular mode $m$ so the tension between BICEP2 and Planck can not be reconciled. The reason is that one has to use the spin-weighted spherical harmonics when projecting...

Topics: High Energy Physics - Theory, Astrophysics, Cosmology and Nongalactic Astrophysics

Source: http://arxiv.org/abs/1404.5112

3
3.0

Jun 29, 2018
06/18

by
Chien-Yi Wang; Sung Hoon Lim; Michael Gastpar

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An information-theoretic lower bound is developed for the caching system studied by Maddah-Ali and Niesen. By comparing the proposed lower bound with the decentralized coded caching scheme of Maddah-Ali and Niesen, the optimal memory--rate tradeoff is characterized to within a multiplicative gap of $4.7$ for the worst case, improving the previous analytical gap of $12$. Furthermore, for the case when users' requests follow the uniform distribution, the multiplicative gap is tightened to $4.7$,...

Topics: Information Theory, Computing Research Repository, Mathematics

Source: http://arxiv.org/abs/1601.05690

3
3.0

Jun 29, 2018
06/18

by
Moon-Jin Kang; Alexis Vasseur; Yi Wang

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We consider a $L^2$-contraction of large viscous shock waves for the multi-dimensional scalar viscous conservation laws, up to a suitable shift. The shift function depends on the time and space variables. It solves a parabolic equation with inhomogeneous coefficients reflecting the perturbation. We consider a suitably small $L^2$-perturbation around a viscous planar shock wave of arbitrarily large strength. However, we do not impose any condition on the anti-derivative variables of the...

Topics: Analysis of PDEs, Mathematics

Source: http://arxiv.org/abs/1609.01825

3
3.0

Jun 29, 2018
06/18

by
Cong Son Ho; Yi Wang; Zhuo Bin Siu; Hyunsoo Yang; Seng Ghee Tan; Mansoor B. A. Jalil

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We investigate the current-induced spin-orbit torque in thin topological insulator (TI) films in the presence of hybridization between the top and bottom surface states. We formulate the relation between spin torque and TI thickness, from which we derived the optimal value of the thickness to maximize the torque. We show numerically that in typical TI thin films made of $\mathrm{Bi_2Se_3}$, the optimal thickness is about 3-5 nm.

Topics: Mesoscale and Nanoscale Physics, Condensed Matter

Source: http://arxiv.org/abs/1611.08116

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4.0

Jun 29, 2018
06/18

by
Junyu Liu; Chon-Man Sou; Yi Wang

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We study the decoherence of massive fields during inflation based on the Zurek's density matrix approach. With the cubic interaction between inflaton and massive fields, the reduced density matrix for the massive fields can be calculated in the Schr\"odinger picture which is related to the variance of the non-Gaussian exponent in the wave functional. The decoherence rate is computed in the one-loop form from functional integration. For heavy fields with $m\gtrsim \mathcal{O}(H)$, quantum...

Topics: High Energy Physics - Theory, Astrophysics, Cosmology and Nongalactic Astrophysics, Quantum...

Source: http://arxiv.org/abs/1608.07909

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3.0

Jun 29, 2018
06/18

by
Xin Yang; Lequan Yu; Lingyun Wu; Yi Wang; Dong Ni; Jing Qin; Pheng-Ann Heng

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Boundary incompleteness raises great challenges to automatic prostate segmentation in ultrasound images. Shape prior can provide strong guidance in estimating the missing boundary, but traditional shape models often suffer from hand-crafted descriptors and local information loss in the fitting procedure. In this paper, we attempt to address those issues with a novel framework. The proposed framework can seamlessly integrate feature extraction and shape prior exploring, and estimate the complete...

Topics: Computer Vision and Pattern Recognition, Computing Research Repository

Source: http://arxiv.org/abs/1612.01655

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2.0

Jun 30, 2018
06/18

by
Sadra Jazayeri; Yashar Akrami; Hassan Firouzjahi; Adam R. Solomon; Yi Wang

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We study the asymmetric primordial fluctuations in a model of inflation in which translational invariance is broken by a domain wall. We calculate the corrections to the power spectrum of curvature perturbations; they are anisotropic and contain dipole, quadrupole, and higher multipoles with non-trivial scale-dependent amplitudes. Inspired by observations of these multipole asymmetries in terms of two-point correlations and variance in real space, we demonstrate that this model can explain the...

Topics: High Energy Physics - Theory, Astrophysics, Cosmology and Nongalactic Astrophysics

Source: http://arxiv.org/abs/1408.3057

2
2.0

Jun 29, 2018
06/18

by
Hongliang Jiang; Yi Wang; Siyi Zhou

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It is usually assumed that the inflationary fluctuations start from the Bunch-Davies (BD) vacuum and the $i\varepsilon$ prescription is used when interactions are calculated. We show that those assumptions can be verified explicitly by calculating the loop corrections to the inflationary two-point and three-point correlation functions. Those loop corrections can be resumed to exponential factors, which suppress non-BD coefficients and behave as the $i\varepsilon$ factor for the case of the BD...

Topic: High Energy Physics - Theory

Source: http://arxiv.org/abs/1601.01179

2
2.0

Jun 29, 2018
06/18

by
Minxi He; Junyu Liu; Shiyun Lu; Siyi Zhou; Yi-Fu Cai; Yi Wang; Robert Brandenberger

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A characteristic signature of String Gas Cosmology is primordial power spectra for scalar and tensor modes which are almost scale-invariant but with a red tilt for scalar modes but a blue tilt for tensor modes. This feature, however, can also be realized in the so-called G-inflation model, in which Horndeski operators are introduced which leads to a blue tensor tilt by softly breaking the Null Energy Condition. In this article we search for potential observational differences between these two...

Topics: High Energy Physics - Theory, Astrophysics, Cosmology and Nongalactic Astrophysics

Source: http://arxiv.org/abs/1608.05079

2
2.0

Jun 30, 2018
06/18

by
Peng Guo; Wenming Cheng; Yi Wang

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This paper addresses the scheduling problem of minimizing the total weighted tardiness on a single machine with step-deteriorating jobs. With the assumption of deterioration, the job processing times are modeled by step functions of job starting times and pre-specified job deteriorating dates. The introduction of step-deteriorating jobs makes a single machine total weighted tardiness problem more intractable. The computational complexity of this problem under consideration was not determined....

Topics: Mathematics, Optimization and Control

Source: http://arxiv.org/abs/1411.0309

2
2.0

Jun 30, 2018
06/18

by
Neng-Yi Wang; Liming Wu

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The objective of this paper is to study the Gibbs sampling for computing the mean of observable in very high dimension - a powerful Markov chain Monte Carlo method. Under the Dobrushin's uniqueness condition, we establish some explicit and sharp estimate of the exponential convergence rate and prove some Gaussian concentration inequalities for the empirical mean.

Topics: Mathematics, Statistics Theory, Statistics

Source: http://arxiv.org/abs/1410.4329

2
2.0

Jun 29, 2018
06/18

by
Pei-Xian Li; Meng-Yun Guan; Chang-Gen Yang; Peng Zhang; Jin-Chang Liu; Yong-Pen Zhang; Cong Guo; Yi Wang

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WIMPs are a well-motivated galactic dark matter candidate. Liquid argon (LAr) is an attractive target for the direct detection of WIMPs. The LAr prototype detector is designed to study the technology and property of LAr detector. The prototype detector have an active volume containing 0.65 kg of liquid argon. The liquid nitrogen(LN) cooling system allows the temperature of liquid argon to be maintained at the boiling point (87.8 K) with fluctuations less than 0.1 K. The prototype was calibrated...

Topics: High Energy Physics - Experiment, Physics, Instrumentation and Detectors

Source: http://arxiv.org/abs/1601.01075

2
2.0

Jun 29, 2018
06/18

by
Jeffrey S. Case; Yi Wang

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The $k$-Hessian operator $\sigma_k$ is the $k$-th elementary symmetric function of the eigenvalues of the Hessian. It is known that the $k$-Hessian equation $\sigma_k(D^2u)=f$ with Dirichlet boundary condition $u=0$ is variational; indeed, this problem can be studied by means of the $k$-Hessian energy $-\int u\sigma_k(D^2u)$. We construct a natural boundary functional which, when added to the $k$-Hessian energy, yields as its critical points solutions of $k$-Hessian equations with general...

Topics: Analysis of PDEs, Mathematics

Source: http://arxiv.org/abs/1606.00071

3
3.0

Jun 30, 2018
06/18

by
Xingang Chen; Razieh Emami; Hassan Firouzjahi; Yi Wang

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We examine the impact of different anisotropic relics on inflation, in particular the predictions on the density perturbations. These relics can be the source of the large scale anomalies in the cosmic microwave background. There are two different types of background relics, one from the matter sector and the other purely from the metric. Although the angular-dependence of the statistical anisotropy in both cases are degenerate, the scale-dependence are observationally distinctive. In addition,...

Topics: High Energy Physics - Theory, Astrophysics, Cosmology and Nongalactic Astrophysics

Source: http://arxiv.org/abs/1408.2096

2
2.0

Jun 28, 2018
06/18

by
Hongliang Jiang; Tao Liu; Sichun Sun; Yi Wang

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Cosmological phase transitions (CPTs), such as the Grand Unified Theory (GUT) and the electroweak (EW) ones, play a significant role in both particle physics and cosmology. In this letter, we propose to probe the first-order CPTs, by detecting gravitational waves (GWs) which are generated during the phase transitions through the cosmic microwave background (CMB). If happened around the inflation era, the first-order CPTs may yield low-frequency GWs due to bubble dynamics, leaving imprints on...

Topics: Cosmology and Nongalactic Astrophysics, Astrophysics, High Energy Physics - Phenomenology, High...

Source: http://arxiv.org/abs/1512.07538

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3.0

Jun 29, 2018
06/18

by
Hua Sun; Yi Wang; Hai-Xia Zhang

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Let $f(q)=a_rq^r+\cdots+a_sq^s$, with $a_r\neq 0$ and $a_s\neq 0$, be a real polynomial. It is a palindromic polynomial of darga $n$ if $r+s=n$ and $a_{r+i}=a_{s-i}$ for all $i$. Polynomials of darga $n$ form a linear subspace $\mathcal{P}_n(q)$ of $\mathbb{R}(q)_{n+1}$ of dimension $\lfloor{n/2}\rfloor+1$. We give transition matrices between two bases $\left\{q^j(1+q+\cdots+q^{n-2j})\right\}, \left\{q^j(1+q)^{n-2j}\right\}$ and the standard basis $\left\{q^j(1+q^{n-2j})\right\}$ of...

Topics: Combinatorics, Mathematics

Source: http://arxiv.org/abs/1601.05629

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3.0

Jun 30, 2018
06/18

by
Jim Jing-Yan Wang; Yi Wang; Shiguang Zhao; Xin Gao

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In this paper, a novel pattern classification approach is proposed by regularizing the classifier learning to maximize mutual information between the classification response and the true class label. We argue that, with the learned classifier, the uncertainty of the true class label of a data sample should be reduced by knowing its classification response as much as possible. The reduced uncertainty is measured by the mutual information between the classification response and the true class...

Topics: Computing Research Repository, Learning

Source: http://arxiv.org/abs/1409.7780

3
3.0

Jun 29, 2018
06/18

by
Yi Wang; Bao-Xuan Zhu

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We show that Stieltjes moment sequences are infinitely log-convex, which parallels a famous result that (finite) P\'olya frequency sequences are infinitely log-concave. We introduce the concept of $q$-Stieltjes moment sequences of polynomials and show that many well-known polynomials in combinatorics are such sequences. We provide a criterion for linear transformations and convolutions preserving Stieltjes moment sequences. Many well-known combinatorial sequences are shown to be Stieltjes...

Topics: Combinatorics, Classical Analysis and ODEs, Mathematics

Source: http://arxiv.org/abs/1612.04114

3
3.0

Jun 29, 2018
06/18

by
Xingang Chen; Yi Wang; Zhong-Zhi Xianyu

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We work out the Standard Model (SM) mass spectrum during inflation with quantum corrections, and explore its observable consequences in the squeezed limit of non-Gaussianity. Both non-Higgs and Higgs inflation models are studied in detail. We also illustrate how some inflationary loop diagrams can be computed neatly by Wick-rotating the inflation background to Euclidean signature and by dimensional regularization.

Topics: High Energy Physics - Theory, Astrophysics, High Energy Physics - Phenomenology, Cosmology and...

Source: http://arxiv.org/abs/1612.08122

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3.0

Jun 30, 2018
06/18

by
Yi Wang; Arthur L. B. Yang

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We prove the total positivity of the Narayana triangles of type $A$ and type $B$, and thus affirmatively confirm a conjecture of Chen, Liang and Wang and a conjecture of Pan and Zeng. We also prove the strict total positivity of the Narayana squares of type $A$ and type $B$.

Topics: Classical Analysis and ODEs, Combinatorics, Mathematics

Source: http://arxiv.org/abs/1702.07822

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Sep 21, 2013
09/13

by
Yi-Fu Cai; Yi Wang

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We investigate the condition for eternal inflation to take place in the noncommutative spacetime. We find that the possibility for eternal inflation's happening is greatly suppressed in this case. If eternal inflation cannot happen in the low energy region where the noncommutativity is very weak (the UV region), it will never happen during the whole inflationary history. Based on these conclusions, we argue that an initial condition for eternal inflation is available from the property of...

Source: http://arxiv.org/abs/0706.0572v2

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4.0

Jun 30, 2018
06/18

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Mohammad Akhshik; Razieh Emami; Hassan Firouzjahi; Yi Wang

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Solid inflation can support a long period of anisotropic inflation. We calculate the statistical anisotropies in the scalar and tensor power spectra and their cross-correlation in anisotropic solid inflation. The tensor-scalar cross-correlation can either be positive or negative, which impacts the statistical anisotropies of the TT and TB spectra in CMB map more significantly compared with the tensor self-correlation. The tensor power spectrum contains potentially comparable contributions from...

Topics: High Energy Physics - Theory, Astrophysics, Cosmology and Nongalactic Astrophysics

Source: http://arxiv.org/abs/1405.4179

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2.0

Jun 29, 2018
06/18

by
Yi Wang; Yujie Chen; Yanfeng Zhang; Hui Chen; Siyuan Yu

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Generalised Hermite-Gaussian modes (gHG modes), an extended notion of Hermite-Gaussian modes (HG modes), are formed by the summation of normal HG modes with a characteristic function $\alpha$, which can be used to unite conventional HG modes and Laguerre-Gaussian modes (LG modes). An infinite number of normalised orthogonal modes can thus be obtained by modulation of the function $\alpha$. The gHG mode notion provides a useful tool in analysis of the deformation and transformation phenomena...

Topics: Optics, Physics

Source: http://arxiv.org/abs/1607.05475

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2.0

Jun 29, 2018
06/18

by
Xingang Chen; Mohammad Hossein Namjoo; Yi Wang

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Since Hubble and Lamaitre's discovery of the expanding universe using galaxies till the recent discovery of the accelerating universe using standard candles, direct measurements of the evolution of the scale factor of the universe a(t) have played central roles in establishing the standard model of cosmology. In this letter, we show that such a measurement may be extended to the primordial universe using massive fields as standard clocks, providing a direct evidence for the scenario responsible...

Topics: High Energy Physics - Theory, Astrophysics, High Energy Physics - Phenomenology, Cosmology and...

Source: http://arxiv.org/abs/1608.01299

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Sep 18, 2013
09/13

by
Xun-Tuan Su; Yi Wang

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Many sequences of binomial coefficients share various unimodality properties. In this paper we consider the unimodality problem of a sequence of binomial coefficients located in a ray or a transversal of the Pascal triangle. Our results give in particular an affirmative answer to a conjecture of Belbachir et al which asserts that such a sequence of binomial coefficients must be unimodal. We also propose two more general conjectures.

Source: http://arxiv.org/abs/0809.1579v1

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2.0

Jun 30, 2018
06/18

by
Chien-Yi Wang; Shirin Saeedi Bidokhti; Michele Wigger

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Improved lower bounds on the average and the worst-case rate-memory tradeoffs for the Maddah-Ali&Niesen coded caching scenario are presented. For any number of users and files and for arbitrary cache sizes, the multiplicative gap between the exact rate-memory tradeoff and the new lower bound is less than 2.315 in the worst-case scenario and less than 2.507 in the average-case scenario.

Topics: Information Theory, Computing Research Repository, Mathematics

Source: http://arxiv.org/abs/1702.04834

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2.0

Jun 29, 2018
06/18

by
Chien-Yi Wang; Michèle Wigger; Abdellatif Zaidi

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This work investigates the downlink of a cloud radio access network (C-RAN) in which a central processor communicates with two mobile users through two base stations (BSs). The BSs act as relay nodes and cooperate with each other through error-free rate-limited links. We develop and analyze two coding schemes for this scenario. The first coding scheme is based on Liu-Kang scheme for C-RANs without BS cooperation; and extends it to scenarios allowing conferencing between the BSs. Among few other...

Topics: Information Theory, Computing Research Repository, Mathematics

Source: http://arxiv.org/abs/1610.09407

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Sep 22, 2013
09/13

by
Yi Wang; Michael Schapira; Jennifer Rexford

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Please Note: This document was written to summarize and facilitate discussion regarding (1) the benefits of changing the way BGP selects routes to selecting the most preferred route allowed by export policies, or more generally, to selecting BGP routes on a per-neighbor basis, (2) the safety condition that guarantees global routing stability under the Neighbor-Specific BGP model, and (3) ways of deploying this model in practice. A paper presenting the formal model and proof of the stability...

Source: http://arxiv.org/abs/0906.3846v1

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Sep 22, 2013
09/13

by
Miao Li; Yi Wang

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We investigate the implications of the entropic force formalism proposed by Verlinde. We show that an UV/IR relation proposed by Cohen et al, as well as an uncertainty principle proposed by Hogan can be derived from the entropic force formalism. We show that applying the entropic force formalism to cosmology, there is an additional term in the Friedmann equation, which can be identified as holographic dark energy. We also propose an intuitive picture of holographic screen, which can be thought...

Source: http://arxiv.org/abs/1001.4466v4

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4.0

Jun 29, 2018
06/18

by
Joohyung Lee; Yi Wang

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Markov Logic Networks (MLN) and Probabilistic Soft Logic (PSL) are widely applied formalisms in Statistical Relational Learning, an emerging area in Artificial Intelligence that is concerned with combining logical and statistical AI. Despite their resemblance, the relationship has not been formally stated. In this paper, we describe the precise semantic relationship between them from a logical perspective. This is facilitated by first extending fuzzy logic to allow weights, which can be also...

Topics: Artificial Intelligence, Computing Research Repository

Source: http://arxiv.org/abs/1606.08896

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3.0

Jun 29, 2018
06/18

by
Lirui Feng; Yi Wang; Jianhong Wu

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We consider semiflows in general Banach spaces motivated by monotone cyclic feedback systems or differential equations with integer-valued Lyapunov functionals. These semiflows enjoy strong monotonicity properties with respect to cones of high ranks, which imply order-related structures on the $\omega$-limit sets of precompact semi-orbits. We show that for a pseudo-ordered precompact semi-orbit the $\omega$-limit set $\Omega$ is either ordered, or is contained in the set of equilibria, or...

Topics: Dynamical Systems, Mathematics

Source: http://arxiv.org/abs/1603.05129