CAS: Physics: Scholarly Papers
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Squeezing in the weakly interacting uniform BoseEinstein condensate
(AMERICAN PHYSICAL SOC, 20061001)We investigate the presence of squeezing in the weakly repulsive uniform Bose gas, in both the condensate mode and in the nonzero oppositemomenta mode pairs, using two different variational formulations. We explore the ... 
Optimal path to epigenetic switching
(AMERICAN PHYSICAL SOC, 20050101)We use large deviation methods to calculate rates of noiseinduced transitions between states in multistable genetic networks. We analyze a synthetic biochemical circuit, the toggle switch, and compare the results to those ... 
Transition temperature of dilute, weakly repulsive Bose gas
(20021225)Within a quasiparticle framework, we reconsider the issue of computing the BoseEinstein condensation temperature (T_c) in a weakly nonideal Bose gas. The main result of this and previous investigations is that T_c increases ... 
Transverse spin diffusion in a dilute spinpolarized degenerate Fermi gas
(SPRINGER/PLENUM PUBLISHERS, 19980801)We reexamine the calculation of the transverse spindiffusion coefficient in a dilute degenerate spinpolarized Fermi gas, for the case of swave scattering. The special feature of this limit is that the dependence of the ... 
Chargegap and spingap formation in exactly solvable Hubbard chains with longrange hopping
(AMERICAN PHYSICAL SOC, 19940415)We discuss the transition from a metal to charge or spininsulating phases characterized by the opening of a gap in the charge or spinexcitation spectra, respectively. These transitions are addressed within the context ... 
Quantum vertex model for reversible classical computing
(NATURE PUBLISHING GROUP, 20170512)Mappings of classical computation onto statistical mechanics models have led to remarkable successes in addressing some complex computational problems. However, such mappings display thermodynamic phase transitions that ... 
Bose condensation without broken symmetries
(KLUWER ACADEMIC/PLENUM PUBL, 20001201)This paper considers the issue of Bose–Einstein condensation in a weakly interacting Bose gas with a fixed total number of particles. We use an old current algebra formulation of nonrelativistic many body systems due to ... 
Band crossing and novel lowenergy behaviour in a mean field theory of a threeband model on a CuO lattice
(IOP PUBLISHING LTD, 19980420)We study correlation effects in a threeband extended Hubbard model of Cu  O planes within the 1/N mean field approach in the infinite U limit. We investigate the emerging phase diagram and discuss the low energy scales ... 
Spinflavor separation and nonFermiliquid behavior in the multichannel Kondo problem: a largeN approach
(AMERICAN PHYSICAL SOC, 19930906)We present an analytical solution of a SU(N)×SU(M) generalization of the multichannel singleimpurity Kondo model in the limit N→∞, M→∞, with γ=M/N fixed. NonFermiliquid behavior of the single electron Green function and ... 
Lowtemperature spindiffusion in a spinpolarized Fermi gas
(AMERICAN PHYSICAL SOC, 19950227)We present a finite temperature calculation of the transverse spindiffusion coefficient D⊥ in a dilute degenerate Fermi gas, in the presence of a small external magnetic field H. While the longitudinal diffusion coefficient ...