30140421
Superfluid dynamics of the fractional quantum Hall state.
Cet effet Hall est du a un nouvel etat de la matiere ayant des proprietes reminescentes de superfluidite. La derivation de l'equation d'Euler et de la contrainte quantique qui determinent la dynamique du superfluide permettent d'expliquer l'incompressibilite du liquide, les excitations des magnetophonons et d'etudier les forces agissant sur des vortex dont l'ancrage est responsable du plateau dans la resistance Hall
121710395
Deconfinement and chiral symmetry restoration at finite temperatures in SU(2) and SU(3) gauge theories
At zero temperature SU(2) and SU(3) gauge theories confine quarks and spontaneously break chiral symmetry. At some non-zero temperatures T/sub c/(T/sub F/) these gauge theories lose confinement (chiral-symmetry breaking). We have studied the order of these phase transitions and the relation between T/sub c/ and T/sub F/ using simulation methods which neglect internal fermion loops. For SU(2) both transitions are second order and 1 less than or equal to T/sub F//T/sub c/ < 1.30. For SU(3) the transitions are first order and we find 1 less than or equal to T/sub F//T/sub c/ less than or equal to 1.05, with T/sub c/ approx. = 200 MeV.
49271770
Problems with Finite Density Simulations of Lattice QCD
We present a discussion of problems that have arisen in attempts to understand the behavior of lattice QCD at high densities. The effects observed in the lattice simulations do not seem to be consistent with what we expect from the usual ideas of chiral symmetry breaking. In particular, at zero quark mass, there does not seem to be a massive baryon at finite density.
33893527
Edge waves in the quantum Hall effect and quantum dots.
We have studied numerically the spectrum of low-energy excitations for quantum dots containing up to 400 electrons near densities corresponding to the quantum-Hall-effect filling fraction \ensuremath{\nu}=1. The results show that, despite strong Coulomb interaction effects, the edge modes are well described as weakly interacting chiral boson edge waves.
11439667
Schur functions, chiral bosons, and the quantum-Hall-effect edge states.
I demonstrate how the many-body wave function may be used to describe the bosonization of the edge excitations of a droplet of \ensuremath{\nu}=1 quantum-Hall liquid. In particular, I exhibit an isomorphism between the charge-neutral edge-state excitations of the droplet and the space of universal symmetric polynomials. There are two natural bases for this space; the first, the Schur functions, correspond to the fermion picture; the second, generated by the power sums, yields the Bose picture and the Kac-Moody algebra. I also show explicitly how the loop group LU(1) acts to create the coherent-state deformations of the droplet shape used in path-integral bosonization and in the quantization of chiral bosons.
124848823
Six lectures on lattice field theory
29081438
Systematics of the release of residual nuclei from relativistic nucleus-nucleus interactions.
We have examined relativistic nuclei of krypton, xenon, holmium, and gold, accelerated in a partially stripped state to a maximum rigidity of about 5.6 GeV, interacting with targets of aluminum, carbon, and polyethylene. For each projectile and target combination we determined the total and partial charge changing cross sections for the production of lighter fragments. From these measurements we have developed a new representation of the dependence of the total charge changing cross sections on beam and target charge. We have also identified simple representations of the variation of the partial cross sections with the charge of the produced fragments and shown that they are dependent on the charge and energy of the beam. The fission of gold nuclei at high energies in these various targets has also been studied.
8364889
Determination of the cross sections for the production of fragments from relativistic nucleus-nucleus interactions. II. Parametric fits.