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Showing 2015Show all

115 papers · 1 filter

cs.IT2015★ 1 cited

Sending a Bivariate Gaussian Source Over a Gaussian MAC with Unidirectional Conferencing Encoders

Shraga I. Bross, Yaron Laufer

We consider the transmission of a memoryless bivariate Gaussian source over a two-user additive Gaussian multiple-access channel with unidirectional conferencing encoders. Here, pr…

cond-mat.str-el2015★ 14 cited

Emergence of helical edge conduction in graphene at the ν=0 quantum Hall state

Pavel Tikhonov, Efrat Shimshoni, H. A. Fertig +1

The conductance of graphene subject to a strong, tilted magnetic field exhibits a dramatic change from insulating to conducting behavior with tilt-angle, regarded as evidence for t…

cond-mat.str-el2015★ 19 cited

Holographic Maps of Quasiparticle Interference

Emanuele G. Dalla Torre, Yang He, Eugene Demler

The analysis of Fourier-transformed scanning-tunneling-microscopy (STM) images with subatomic resolution is a common tool for studying properties of quasiparticle excitations in st…

cs.LG2015★ 3 cited

Risk Minimization in Structured Prediction using Orbit Loss

Danny Karmon, Joseph Keshet

We introduce a new surrogate loss function called orbit loss in the structured prediction framework, which has good theoretical and practical advantages. While the orbit loss is no…

math.CA2015★ 31 cited

Fourier quasicrystals and discreteness of the diffraction spectrum

Nir Lev, Alexander Olevskii

We prove that a positive-definite measure in with uniformly discrete support and discrete closed spectrum, is representable as a finite linear combination of Dirac c…

quant-ph2015

Notes on Adiabatic Quantum Computers

Boaz Tamir, Eliahu Cohen

We discuss in this chapter the basics of adiabatic computation, as well as some physical implementations. After a short introduction of the quantum circuit model, we describe quant…

cond-mat.dis-nn2015★ 60 cited

Energy transport in the Anderson insulator

D. B. Gutman, I. V. Protopopov, A. L. Burin +3

We study the heat conductivity in Anderson insulators in the presence of power-law interaction. Particle-hole excitations built on localized electron states are viewed as two-level…

cs.DL2015★ 1 cited

A new methodology for comparing Google Scholar and Scopus

Henk F. Moed, Judit Bar-Ilan, Gali Halevi

A new methodology is proposed for comparing Google Scholar (GS) with other citation indexes. It focuses on the coverage and citation impact of sources, indexing speed, and data qua…

physics.soc-ph2015★ 40 cited

Percolation properties in a traffic model

Feilong Wang, Daqing Li, Xiaoyun Xu +2

As a dynamical complex system, traffic is characterized by a transition from free flow to congestions, which is mostly studied in highways. However, despite its importance in devel…

math.CO2015

On the Correlation of Increasing Families

Gil Kalai, Nathan Keller, Elchanan Mossel

The classical correlation inequality of Harris asserts that any two monotone increasing families on the discrete cube are nonnegatively correlated. In 1996, Talagrand established a…

cond-mat.str-el2015★ 6 cited

Bulk Entanglement Spectrum in Gapped Spin Ladders

Raul A. Santos, Chao-Ming Jian, Rex Lundgren

We study the bulk entanglement of a series of gapped ground states of spin ladders, representative of the Haldane phase. These ground states of spin ladders generalize the va…

physics.class-ph2015

An Underlying Geometrical Manifold for Hamiltonian Mechanics

L. P. Horwitz, A. Yahalom, J. Levitan +1

We show that there exists an underlying manifold with a conformal metric and compatible connection form, and a metric type Hamiltonian (which we call the geometrical picture) that…

cond-mat.quant-gas2015★ 12 cited

Buckling transitions and clock order of two-dimensional Coulomb crystals

Daniel Podolsky, Efrat Shimshoni, Giovanna Morigi +1

Crystals of repulsively interacting ions in planar traps form hexagonal lattices, which undergo a buckling instability towards a multi-layer structure as the transverse trap freque…

math.GR2015★ 2 cited

A Practical Cryptanalysis of the Algebraic Eraser

Adi Ben-Zvi, Simon R. Blackburn, Boaz Tsaban

Anshel, Anshel, Goldfeld and Lemieaux introduced the Colored Burau Key Agreement Protocol (CBKAP) as the concrete instantiation of their Algebraic Eraser scheme. This scheme, based…

cs.DS2015★ 7 cited

Waste Makes Haste: Bounded Time Protocols for Envy-Free Cake Cutting with Free Disposal

Erel Segal-Halevi, Avinatan Hassidim, Yonatan Aumann

We consider the classic problem of envy-free division of a heterogeneous good ("cake") among several agents. It is known that, when the allotted pieces must be connected, the probl…

q-bio.NC2015★ 14 cited

Broadband Macroscopic Cortical Oscillations Emerge from Intrinsic Neuronal Response Failures

Amir Goldental, Roni Vardi, Shira Sardi +2

Broadband spontaneous macroscopic neural oscillations are rhythmic cortical firing which were extensively examined during the last century, however, their possible origination is s…

cs.SD2015

A Hybrid Approach for Speech Enhancement Using MoG Model and Neural Network Phoneme Classifier

Shlomo E. Chazan, Jacob Goldberger, Sharon Gannot

In this paper we present a single-microphone speech enhancement algorithm. A hybrid approach is proposed merging the generative mixture of Gaussians (MoG) model and the discriminat…

math.LO2015

An extension of the Ehrenfeucht-Fraisse game for first order logics augmented with Lindstrom quantifiers

Simi Haber, Saharon Shelah

We propose an extension of the Ehrenfeucht-Fraisse game able to deal with logics augmented with Lindstrom quantifiers. We describe three different games with varying balance betwee…

cs.CY2015★ 26 cited

Debunking in a World of Tribes

Fabiana Zollo, Alessandro Bessi, Michela Del Vicario +5

Recently a simple military exercise on the Internet was perceived as the beginning of a new civil war in the US. Social media aggregate people around common interests eliciting a c…

cond-mat.str-el2015★ 17 cited

Collective Bulk and Edge Modes through the Quantum Phase Transition in Graphene at

Ganpathy Murthy, Efrat Shimshoni, H. A. Fertig

Undoped graphene in a strong, tilted magnetic field exhibits a radical change in conduction upon changing the tilt-angle, which can be attributed to a quantum phase transition from…

math.NT2015★ 8 cited

Nodal domains of Maass forms II

Amit Ghosh, Andre Reznikov, Peter Sarnak

In Part I we gave a polynomial growth lower-bound for the number of nodal domains of a Hecke-Maass cuspform in a compact part of the modular surface, assuming a Lindelöf hypothesis…

cond-mat.quant-gas2015★ 28 cited

Non equilibrium phase transitions and Floquet Kibble-Zurek scaling

Angelo Russomanno, Emanuele G. Dalla Torre

We study the slow crossing of non-equilibrium quantum phase transitions in periodically-driven systems. We explicitly consider a spin chain with a uniform time-dependent magnetic f…

cs.GT2015★ 29 cited

Monotonicity and Competitive Equilibrium in Cake-cutting

Erel Segal-Halevi, Balázs Sziklai

We study the monotonicity properties of solutions in the classic problem of fair cake-cutting --- dividing a heterogeneous resource among agents with different preferences. Resourc…

cs.SD2015★ 41 cited

A Variational EM Algorithm for the Separation of Time-Varying Convolutive Audio Mixtures

Dionyssos Kounades-Bastian, Laurent Girin, Xavier Alameda-Pineda +2

This paper addresses the problem of separating audio sources from time-varying convolutive mixtures. We propose a probabilistic framework based on the local complex-Gaussian model…