Technical Digest. Summaries of Papers Presented at the International Quantum Electronics Conference. Conference Edition. 1998 Technical Digest Series, Vol.7 (IEEE Cat. No.98CH36236), 2000
ABSTRACT Experimental techniques for the production and manipulation of Bose-Einstein condensates... more ABSTRACT Experimental techniques for the production and manipulation of Bose-Einstein condensates have now advanced to the stage where macroscopic coherence effects have been observed. The usual method for theoretical investigation of the bulk properties of a Bose-Einstein condensate with collisions is to use the Gross-Pitaevski equation, which ignores any contribution made by quantum noise within a condensate
A diagram approach to classical nonlinear stochastic field theory is introduced. This approach is... more A diagram approach to classical nonlinear stochastic field theory is introduced. This approach is intended to serve as a link between quantum and classical field theories, resulting in an independent constructive characterisation of the measure in Feynman path integrals in terms of stochastic differential equations for the paths.
We describe quantum-field-theoretical (QFT) techniques for mapping quantum problems onto c-number... more We describe quantum-field-theoretical (QFT) techniques for mapping quantum problems onto c-number stochastic problems. This approach yields results which are identical to phase-space techniques [C.W. Gardiner, {\em Quantum Noise} (1991)] when the latter result in a Fokker-Planck equation for a corresponding pseudo-probability distribution. If phase-space techniques do not result in a Fokker-Planck equation and hence fail to produce a stochastic representation,
We analyse scattering of a heavy atom off a weakly bound molecule comprising an identical heavy a... more We analyse scattering of a heavy atom off a weakly bound molecule comprising an identical heavy and a light atom in the Born-Oppenheimer approximation. We focus on the situation where the heavy atoms are bosons, which was realized in several experiments. The elastic and inelastic cross sections for the atom-molecular scattering exhibit a series of resonances corresponding to three-body Efimov
Collisional damping of the excitations in a Bose-condensed gas is investigated over the wide rang... more Collisional damping of the excitations in a Bose-condensed gas is investigated over the wide range of energies and temperatures. Numerical results for the damping rate are presented and a number of asymptotic and interpolating expressions for it are derived.
Technical Digest. Summaries of Papers Presented at the International Quantum Electronics Conference. Conference Edition. 1998 Technical Digest Series, Vol.7 (IEEE Cat. No.98CH36236), 2000
ABSTRACT Experimental techniques for the production and manipulation of Bose-Einstein condensates... more ABSTRACT Experimental techniques for the production and manipulation of Bose-Einstein condensates have now advanced to the stage where macroscopic coherence effects have been observed. The usual method for theoretical investigation of the bulk properties of a Bose-Einstein condensate with collisions is to use the Gross-Pitaevski equation, which ignores any contribution made by quantum noise within a condensate
A diagram approach to classical nonlinear stochastic field theory is introduced. This approach is... more A diagram approach to classical nonlinear stochastic field theory is introduced. This approach is intended to serve as a link between quantum and classical field theories, resulting in an independent constructive characterisation of the measure in Feynman path integrals in terms of stochastic differential equations for the paths.
We describe quantum-field-theoretical (QFT) techniques for mapping quantum problems onto c-number... more We describe quantum-field-theoretical (QFT) techniques for mapping quantum problems onto c-number stochastic problems. This approach yields results which are identical to phase-space techniques [C.W. Gardiner, {\em Quantum Noise} (1991)] when the latter result in a Fokker-Planck equation for a corresponding pseudo-probability distribution. If phase-space techniques do not result in a Fokker-Planck equation and hence fail to produce a stochastic representation,
We analyse scattering of a heavy atom off a weakly bound molecule comprising an identical heavy a... more We analyse scattering of a heavy atom off a weakly bound molecule comprising an identical heavy and a light atom in the Born-Oppenheimer approximation. We focus on the situation where the heavy atoms are bosons, which was realized in several experiments. The elastic and inelastic cross sections for the atom-molecular scattering exhibit a series of resonances corresponding to three-body Efimov
Collisional damping of the excitations in a Bose-condensed gas is investigated over the wide rang... more Collisional damping of the excitations in a Bose-condensed gas is investigated over the wide range of energies and temperatures. Numerical results for the damping rate are presented and a number of asymptotic and interpolating expressions for it are derived.
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Papers by L. Plimak