Showing 2012Show all

582 papers · 1 filter

cs.LG2012★ 3 cited

Bethe Bounds and Approximating the Global Optimum

Adrian Weller, Tony Jebara

Inference in general Markov random fields (MRFs) is NP-hard, though identifying the maximum a posteriori (MAP) configuration of pairwise MRFs with submodular cost functions is effi…

hep-ex2012★ 36 cited

Multi-channel search for squarks and gluinos in sqrt(s)=7 TeV pp collisions with the ATLAS detector

ATLAS Collaboration

A search for supersymmetric particles in final states with zero, one, and two leptons, with and without jets identified as originating from b-quarks, in 4.7 fb-1 of sqrt(s)=7 TeV p…

math-ph2012★ 110 cited

Wave packets in Honeycomb Structures and Two-Dimensional Dirac Equations

Charles L. Fefferman, Michael I. Weinstein

In a recent article [10], the authors proved that the non-relativistic Schrödinger operator with a generic honeycomb lattice potential has conical (Dirac) points in its dispersion…

astro-ph.SR2012★ 79 cited

BK Lyncis: The Oldest Old Nova?... And a Bellwether for Cataclysmic-Variable Evolution

Joseph Patterson, Helena Uthas, Jonathan Kemp +21

We summarize the results of a 20-year campaign to study the light curves of BK Lyncis, a nova-like star strangely located below the 2-3 hour orbital period gap in the family of cat…

cs.GT2012

The Inverse Shapley Value Problem

Anindya De, Ilias Diakonikolas, Rocco A. Servedio

For a weighted voting scheme used by voters to choose between two candidates, the \emph{Shapley-Shubik Indices} (or {\em Shapley values}) of provide a measure of ho…

cond-mat.str-el2012★ 86 cited

Energetics of superconductivity in the two dimensional Hubbard model

Emanuel Gull, Andrew J. Millis

The energetics of the interplay between superconductivity and the pseudogap in high temperature superconductivity is examined using the eight-site dynamical cluster approximation t…

cond-mat.mes-hall2012★ 1.8k cited

Hofstadter's butterfly in moire superlattices: A fractal quantum Hall effect

C. R. Dean, L. Wang, P. Maher +12

Electrons moving through a spatially periodic lattice potential develop a quantized energy spectrum consisting of discrete Bloch bands. In two dimensions, electrons moving through…

astro-ph.HE2012★ 44 cited

Discovery of TeV Gamma-ray Emission from CTA 1 by VERITAS

E. Aliu, S. Archambault, T. Arlen +88

We report the discovery of TeV gamma-ray emission coincident with the shell-type radio supernova remnant (SNR) CTA 1 using the VERITAS gamma-ray observatory. The source, VER J0006+…

nucl-ex2012★ 56 cited

Medium modification of jet fragmentation in Au+Au collisions at sqrt(s_NN)=200 GeV measured in direct photon-hadron correlations

A. Adare, S. Afanasiev, C. Aidala +559

The jet fragmentation function is measured with direct photon-hadron correlations in p+p and Au+Au collisions at sqrt(s_NN)=200 GeV. The p_T of the photon is an excellent approxima…

astro-ph.SR2012★ 20 cited

Measurements of Anisotropic Ion Temperatures, Non-Thermal Velocities, and Doppler Shifts in a Coronal Hole

M. Hahn, D. W. Savin

We present a new diagnostic allowing one to measure the anisotropy of ion temperatures and non-thermal velocities as well as Doppler shifts with respect to the ambient magnetic fie…

physics.geo-ph2012★ 17 cited

Melt-Enhanced Rejuvenation of Lithospheric Mantle: Insights from the Colorado Plateau

Mousumi Roy, Rodrigo Osuna Orozco, Ben Holtzman +1

The stability of the lithospheric mantle beneath the ancient cratonic cores of continents is primarily a function of chemical modification during the process of melt extraction. Pr…

astro-ph.GA2012★ 136 cited

Constraints on Hydrodynamical Subgrid Models from Quasar Absorption Line Studies of the Simulated Circumgalactic Medium

Cameron Hummels, Greg Bryan, Britton Smith +1

Cosmological hydrodynamical simulations of galaxy evolution are increasingly able to produce realistic galaxies, but the largest hurdle remaining is in constructing subgrid models…

astro-ph.CO2012★ 139 cited

How Gravitational-wave Observations Can Shape the Gamma-ray Burst Paradigm

Imre Bartos, Patrick Brady, Szabolcs Marka

By reaching through shrouding blastwaves, efficiently discovering off-axis events, and probing the central engine at work, gravitational wave (GW) observations will soon revolution…

stat.ME2012★ 3 cited

From Boundary Crossing of Non-Random Functions to Boundary Crossing of Stochastic Processes

Mark Brown, Victor de la Pena, Tony Sit

One problem of wide interest involves estimating expected crossing-times. Several tools have been developed to solve this problem beginning with the works of Wald and the theory of…

cond-mat.mes-hall2012★ 1 cited

Evidence of inter-layer interaction in magneto-luminescence spectra of electron bilayers

Ilirjan Aliaj, Vittorio Pellegrini, Andrea Gamucci +4

Magneto-luminescence studies in electron bilayers reveal the hallmarks of the even-denominator and other quantum Hall states in the intensities and energies of the inter-band optic…

math.NT2012★ 8 cited

A Recursion Formula for Moments of Derivatives of Random Matrix Polynomials

S. Ali Altug, Sandro Bettin, Ian Petrow +2

We give asymptotic formulae for random matrix averages of derivatives of characteristic polynomials over the groups USp(2N), SO(2N) and O^-(2N). These averages are used to predict…

physics.optics2012★ 17 cited

Near-infrared Hong-Ou-Mandel interference on a silicon quantum photonic circuit

Xinan Xu, Zhenda Xie, Jiangjun Zheng +9

Near-infrared Hong-Ou-Mandel quantum interference is observed in silicon nanophotonic directional couplers with raw visibilities on-chip at 90.5%. Spectrally-bright 1557-nm two-pho…

cond-mat.str-el2012★ 153 cited

Numerically Exact Long Time Magnetization Dynamics at the Nonequilibrium Kondo Crossover of the Anderson Impurity Model

Guy Cohen, Emanuel Gull, David R. Reichman +2

We investigate the dynamical and steady-state spin response of the nonequilibrium Anderson model to magnetic fields, bias voltage, and temperature using a numerically exact method…

hep-lat2012★ 69 cited

Long distance contribution to the mass difference

N. H. Christ, T. Izubuchi, C. T. Sachrajda +2

We develop and demonstrate techniques needed to compute the long distance contribution to the - mass difference, , in lattice QCD and carry out a first, explora…

hep-ex2012★ 21 cited

A search for prompt lepton-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

ATLAS Collaboration

We present a search for a light (mass < 2 GeV) boson predicted by Hidden Valley supersymmetric models that decays into a final state consisting of collimated muons or electrons, de…

astro-ph.CO2012★ 5.1k cited

Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results

G. Hinshaw, D. Larson, E. Komatsu +18

We present cosmological parameter constraints based on the final nine-year WMAP data, in conjunction with additional cosmological data sets. The WMAP data alone, and in combination…

astro-ph.CO2012★ 2.4k cited

Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results

C. L. Bennett, D. Larson, J. L. Weiland +18

We present the final nine-year maps and basic results from the WMAP mission. We provide new nine-year full sky temperature maps that were processed to reduce the asymmetry of the e…

hep-ex2012★ 557 cited

Observation of Associated Near-side and Away-side Long-range Correlations in sqrt(s_NN)=5.02 TeV Proton-lead Collisions with the ATLAS Detector

ATLAS Collaboration

Two-particle correlations in relative azimuthal angle (Delta-phi) and pseudorapidity (Delta-eta) are measured in sqrt(s_NN) = 5.02 TeV p+Pb collisions using the ATLAS detector at t…

cs.IT2012★ 7 cited

On the Capacity Region and the Generalized Degrees of Freedom Region for the MIMO Interference Channel with Feedback

Mehdi Ashraphijuo, Vaneet Aggarwal, Xiaodong Wang

In this paper, we study the effect of feedback on two-user MIMO interference channels. The capacity region of MIMO interference channels with feedback is characterized within a con…