Showing 2004Show all

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cond-mat.mes-hall2004★ 19 cited

Molecular transistor coupled to phonons and Luttinger-liquid leads

So Takei, Yong Baek Kim, Aditi Mitra

We study the effects of electron-phonon interactions on the transport properties of a molecular quantum dot coupled to two Luttinger-liquid leads. In particular, we investigate the…

astro-ph2004★ 41 cited

Search for Point Sources of Ultra-High Energy Cosmic Rays Above 40 EeV Using a Maximum Likelihood Ratio Test

s Eye Collaboration, G. R. Farrar

We present the results of a search for cosmic ray point sources at energies above 40 EeV in the combined data sets recorded by the AGASA and HiRes stereo experiments. The analysis…

cond-mat.mes-hall2004★ 44 cited

Tilt Induced Localization and Delocalization in the Second Landau Level

G. A. Csathy, J. S. Xia, C. L. Vicente +6

We have investigated the behavior of electronic phases of the second Landau level under tilted magnetic fields. The fractional quantum Hall liquids at 2+1/5 and 2+4/5 and the s…

hep-ph2004★ 19 cited

Bose-Einstein or HBT correlations and the anomalous dimension of QCD

T. Csorgo, S. Hegyi, T. Novak +1

Bose-Einstein (or HBT) correlation functions are evaluated for the fractal structure of QCD jets. These correlation functions have a stretched exponential (or Levy-stable) form. Th…

cond-mat.other2004★ 121 cited

Spontaneous Symmetry Breaking in Photonic Lattices: Theory and Experiment

P. G. Kevrekidis, Zhigang Chen, B. A. Malomed +2

We examine an example of spontaneous symmetry breaking in a double-well waveguide with a symmetric potential. The ground state of the system beyond a critical power becomes asymmet…

cond-mat.mes-hall2004★ 117 cited

Measurements of the density-dependent many-body electron mass in 2D GaAs/AlGaAs Heterostructures

Y. -W. Tan, J. Zhu, H. L. Stormer +3

We determine the density-dependent electron mass, m*, in two-dimensional (2D) electron systems of GaAs/AlGaAs heterostructures by performing detailed low-temperature Shubnikov deHa…

astro-ph2004★ 860 cited

Evolution of the Solar Activity over Time and Effects on Planetary Atmospheres: I. High-energy Irradiances (1-1700 A)

I. Ribas, E. F. Guinan, M. Guedel +1

We report on the results of the Sun in Time multi-wavelength program (X-rays to the UV) of solar analogs with ages covering ~0.1-7 Gyr. The chief science goals are to study the sol…

cs.NI2004★ 110 cited

An Analysis of the Skype Peer-to-Peer Internet Telephony Protocol

Salman A. Baset, Henning Schulzrinne

Skype is a peer-to-peer VoIP client developed by KaZaa in 2003. Skype claims that it can work almost seamlessly across NATs and firewalls and has better voice quality than the MSN…

nucl-ex2004★ 22 cited

Relevance of baseline hard proton-proton spectra for high-energy nucleus-nucleus physics

David d'Enterria

We discuss three different cases of hard inclusive spectra in proton-proton collisions: high single hadron production at 20 GeV and at = 62.4 GeV…

astro-ph2004★ 38 cited

The Helium-Rich Cataclysmic Variable ES Ceti

Catherine Espaillat, Joseph Patterson, Brian Warner +1

We report photometry of the helium-rich cataclysmic variable ES Ceti during 2001-2004. The star is roughly stable at V ~ 17.0 and has a light curve dominated by a single period of…

math.AG2004★ 7 cited

A study of the Hilbert-Mumford criterion for the stability of projective varieties

J. Ross, R. P. Thomas

We make a systematic study of the Hilbert-Mumford criterion for different notions of stability for polarised algebraic varieties ; in particular for K- and Chow stability. F…

math.NT2004★ 54 cited

Benford's Law, Values of L-functions and the 3x+1 Problem

Alex V. Kontorovich, Steven J. Miller

We show the leading digits of a variety of systems satisfying certain conditions follow Benford's Law. For each system proving this involves two main ingredients. One is a structur…

hep-ex2004★ 12 cited

A Search for Anomalous Heavy-Flavor Quark Production in Association with W Bosons

D0 Collaboration, V. M. Abazov

We present a search for anomalous production of heavy-flavor quark jets in association with a W boson at the Fermilab Tevatron ppbar Collider. This search is conducted through an e…

astro-ph2004★ 150 cited

PSR J1756-2251: a new relativistic double neutron star system

A. J. Faulkner, M. Kramer, A. G. Lyne +9

We report the discovery during the Parkes Multibeam Pulsar Survey of PSR J1756-2251, a 28.5 ms pulsar in a relativistic binary system. Subsequent timing observations showed the pul…

astro-ph2004★ 38 cited

Identification of an Extended Accretion Disk Corona in the Hercules X-1 Low State: Moderate Optical Depth, Precise Density Determination, and Verification of CNO Abundances

Mario A. Jimenez-Garate, John C. Raymond, Duane A. Liedahl +1

We identify an accretion disk atmosphere and corona from the high resolution X-ray spectrum of Hercules X-1, and we determine its detailed physical properties. More than two dozen…

cond-mat.str-el2004★ 7 cited

Comment on "A Tale of Two Theories: Quantum Griffiths Effects in Metallic Systems" by A. H. Castro-Neto and B. A. Jones

A. J. Millis, D. K. Morr, J. Schmalian

In a recent paper Castro-Neto and Jones argue that because the observability of quantum Griffiths-McCoy effects in metals is controlled by non-universal quantities, the quantum Gri…

cond-mat.mes-hall2004★ 26 cited

Observation of collapse of pseudospin order in bilayer quantum Hall ferromagnets

Stefano Luin, Vittorio Pellegrini, Aron Pinczuk +3

The Hartree-Fock paradigm of bilayer quantum Hall states with finite tunneling at filling factor =1 has full pseudospin ferromagnetic order with all the electrons in the lowest…

cond-mat.mes-hall2004

Geometric spin dephasing of carriers with strong spin-orbit coupling

Yuri A. Serebrennikov

It has been shown that the geometric Berry-phase shift acquired by the components of the light hole (LH) spinor during an adiabatic collision is equal to the angular distance trave…

hep-th2004★ 59 cited

Asyzygies, modular forms, and the superstring measure II

Eric D'Hoker, D. H. Phong

Precise factorization constraints are formulated for the three-loop superstring chiral measure, in the separating degeneration limit. Several natural Ansätze in terms of polynomial…

astro-ph2004★ 71 cited

Optical and GeV-TeV flashes from gamma-ray bursts

Andrei M. Beloborodov

The synchrotron optical flash caught in GRB 990123 overlaps with the MeV radiation front, and the optical-emitting electrons must also produce GeV-TeV emission by inverse Compton s…

hep-th2004★ 38 cited

Asyzygies, modular forms, and the superstring measure I

Eric D'Hoker, D. H. Phong

The goal of this paper and of a subsequent continuation is to find some viable ansatze for the three-loop superstring chiral measure. For this, two alternative formulas are derived…

q-bio.QM2004★ 105 cited

An Information-Theoretic Approach to Network Modularity

Etay Ziv, Manuel Middendorf, Chris Wiggins

Exploiting recent developments in information theory, we propose, illustrate, and validate a principled information-theoretic algorithm for module discovery and resulting measure o…

astro-ph2004★ 325 cited

The GALEX-VVDS Measurement of the Evolution of the Far-Ultraviolet Luminosity Density and the Cosmic Star Formation Rate

D. Schiminovich, O. Ilbert, S. Arnouts +10

In a companion paper (Arnouts et al. 2004) we presented new measurements of the galaxy luminosity function at 1500 Angstroms out to z~1 using GALEX-VVDS observations (1039 galaxies…

astro-ph2004★ 217 cited

The GALEX-VVDS Measurement of the Evolution of the 1500A Luminosity Function

S. Arnouts, D. Schiminovich, O. Ilbert +8

We present the first measurement of the galaxy luminosity function at 1500A between 0.2<z<1.2 based on GALEX-VVDS observations (1000 spectroscopic redshifts for galaxies with NUV<2…