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quant-ph1998★ 61 cited

Dispersion in Femtosecond Entangled Two-Photon Interference

J. Perina, A. V. Sergienko, B. M. Jost +2

We theoretically investigate the quantum interference of entangled two-photon states generated in a nonlinear crystal pumped by femtosecond optical pulses. Interference patterns ge…

quant-ph1998★ 6 cited

Determining Acceptance Possibility for a Quantum Computation is Hard for the Polynomial Hierarchy

Stephen Fenner, Frederic Green, Steven Homer +1

It is shown that determining whether a quantum computation has a non-zero probability of accepting is at least as hard as the polynomial time hierarchy. This hardness result also a…

cond-mat.stat-mech1998

Discrete molecular dynamics studies of the folding of a protein-like model

Nikolay V. Dokholyan, Sergey V. Buldyrev, H. Eugene Stanley +1

Background: Many attempts have been made to resolve in time the folding of model proteins in computer simulations. Different computational approaches have emerged. Some of these ap…

cond-mat.stat-mech1998

Identifying the protein folding nucleus using molecular dynamics

Nikolay V. Dokholyan, Sergey V. Buldyrev, H. Eugene Stanley +1

Molecular dynamics simulations of folding in an off-lattice protein model reveal a nucleation scenario, in which a few well-defined contacts are formed with high probability in the…

hep-ex1998★ 84 cited

Limits on dark matter WIMPs using upward-going muons in the MACRO detector

The MACRO Collaboration, M. Ambrosio et al

We perform an indirect search for Weakly Interacting Massive Particles (WIMPs) using the MACRO detector to look for neutrino-induced upward-going muons resulting from the annihilat…

astro-ph1998★ 144 cited

A Mid-Infrared Imaging Survey of Proto-Planetary Nebula Candidates

Margaret Meixner, Toshiya Ueta, Aditya Dayal +6

We present the data from a mid-infrared imaging survey of 66 proto-planetary nebula candidates using two mid-IR cameras (MIRAC2 and Berkcam) at the NASA Infrared Telescope Facility…

cond-mat.stat-mech1998★ 21 cited

Tsallis statistics with normalized q-expectation values is thermodynamically stable: illustrations

A. R. Lima, T. J. P. Penna

We present a study of both the ``Iterative Procedure'' and the `` transformation'', proposed by Tsallis et al (Physica A261, 534) to find the probabilities of a syst…

cond-mat.stat-mech1998

Navier-Stokes Equations for Generalized Thermostatistics

Bruce M. Boghosian

Tsallis has proposed a generalization of Boltzmann-Gibbs thermostatistics by introducing a family of generalized nonextensive entropy functionals with a single parameter . These…

astro-ph1998★ 102 cited

A semianalytical model for the observational properties of the dominant carbon species at different metallicities

Alberto D. Bolatto, James M. Jackson, James G. Ingalls

We present a simple, semianalytical approach to compute the line emission of C+, C and CO in Photodissociation Regions of varying metallicity that depends on very few parameters an…

hep-ex1998★ 356 cited

Measurement of the solar neutrino energy spectrum using neutrino-electron scattering

Kamiokande collaboration

A measurement of the energy spectrum of recoil electrons from solar neutrino scattering in the Super--Kamiokande detector is presented. The results shown here are obtained from 504…

hep-ex1998★ 67 cited

Measurement of the High-Mass Drell-Yan Cross Section and Limits on Quark-Electron Compositeness Scales

B. Abbott

We present a measurement of the Drell-Yan cross section at high dielectron invariant mass using 120/pb of data collected in pbar-p collisions at sqrt(s) = 1.8 TeV by the D0 collabo…

hep-ex1998★ 378 cited

Constraints on neutrino oscillation parameters from the measurement of day-night solar neutrino fluxes at Super-Kamiokande

Kamiokande Collaboration, Y. Fukuda, T. Hayakawa +2

A search for day-night variations in the solar neutrino flux resulting from neutrino oscillations has been carried out using the 504 day sample of solar neutrino data obtained at S…

astro-ph1998★ 26 cited

Multiwaveband Observations of Quasars with Flat Radio Spectra and Strong Millimeter Emission

S. D. Bloom, A. P. Marscher, E. M. Moore +5

We present multiwaveband observations of a well selected sample of 28 quasars and two radio galaxies with flat radio spectra and strong millimeter wave emission (referred to here a…

hep-ph1998★ 141 cited

An effective field theory of QCD at high density

Deog Ki Hong

We derive a (Wilsonian) effective field theory of QCD at finite density by integrating out the states in the Dirac sea when the chemical potential . The quark-gluo…

hep-ex1998★ 581 cited

Measurement of the flux and zenith-angle distribution of upward through-going muons by Super-Kamiokande

Kamiokande Collaboration

A total of 614 upward through-going muons of minimum energy 1.6 GeV are observed by Super-Kamiokande during 537 detector live days. The measured muon flux is 1.74+/-0.07(stat.)+/-0…

hep-ph1998★ 37 cited

Flavour Universal Dynamical Electroweak Symmetry Breaking

Gustavo Burdman, Nick Evans

The top condensate see-saw mechanism of Dobrescu and Hill allows electroweak symmetry to be broken while deferring the problem of flavour to an electroweak singlet, massive sector.…

cond-mat1998★ 229 cited

Fast and slow dynamics of hydrogen bonds in liquid water

Francis W. Starr, Johannes K. Nielsen, H. Eugene Stanley

We study hydrogen-bond dynamics in liquid water at low temperatures using molecular dynamics simulations. We find that bond lifetime (``fast dynamics'') has Arrhenius temperature d…

cond-mat1998★ 2 cited

Structural evidence for the continuity of liquid and glassy water

Francis W. Starr, Marie-Claire Bellissent-Funel, H. Eugene Stanley

An open question is whether the liquid and glassy phases of water are thermodynamically distinct or continuous. Here we address this question using molecular dynamics simulations i…

cond-mat.stat-mech1998★ 6 cited

Dynamic behavior of driven interfaces in models with two absorbing states

Sungchul Kwon, WonMuk Hwang, Hyunggyu Park

We study the dynamics of an interface (active domain) between different absorbing regions in models with two absorbing states in one dimension; probabilistic cellular automata mode…

astro-ph1998★ 163 cited

A Study of High Energy Emission from the TeV blazar Mrk 501 during Multiwavelength Observations in 1996

J. Kataoka, J. R. Mattox, J. Quinn +8

We present the results of a multiwavelength campaign for Mrk 501 performed in March 1996 with ASCA, EGRET, Whipple, and optical telescopes. In the X-ray band, a spectral break was…

math.AG1998★ 1 cited

Gluing of perverse sheaves on the basic affine space

Roman Bezrukavnikov, Alexander Polishchuk

This paper is devoted to the study of the gluing construction for perverse sheaves on introduced by Kazhdan and Laumon ( is a semisimple gourp, is the unipotent radica…

hep-ex1998★ 30 cited

Search for High Mass Photon Pairs in p-pbar --> gamma-gamma-jet-jet Events at sqrt(s)=1.8 TeV

D0 Collaboration, B. Abbott

A search has been carried out for events in the channel p-barp --> gamma gamma jet jet. Such a signature can characterize the production of a non-standard Higgs boson together with…

cond-mat1998★ 3 cited

Temperature dependence of the diffuse scattering fine structure in equiatomic CuAu

O. Malis, K. F. Ludwig, W. Schweika +2

The temperature dependence of the diffuse scattering fine structure from disordered equiatomic CuAu was studied using {\it in situ} x-ray scattering. In contrast to CuAu the di…

comp-gas1998★ 24 cited

Lattice-Gas Simulations of Ternary Amphiphilic Fluid Flow in Porous Media

P. V. Coveney, J. -B. Maillet, J. L. Wilson +3

We develop our existing two-dimensional lattice-gas model to simulate the flow of single-phase, binary-immiscible and ternary-amphiphilic fluids. This involves the inclusion of fix…