Physics – Quantum Physics
Scientific paper
2002-03-06
Physical Review A, 66, 033812 (2002)
Physics
Quantum Physics
17 pages, 5 figures. v2: Some changes in Appendix 1. Typos corrected
Scientific paper
10.1103/PhysRevA.66.033812
P representation techniques, which have been very successful in quantum optics and in other fields, are also useful for general bosonic quantum dynamical many-body calculations such as Bose-Einstein condensation. We introduce a representation called the gauge P representation which greatly widens the range of tractable problems. Our treatment results in an infinite set of possible time-evolution equations, depending on arbitrary gauge functions that can be optimized for a given quantum system. In some cases, previous methods can give erroneous results, due to the usual assumption of vanishing boundary conditions being invalid for those particular systems. Solutions are given to this boundary-term problem for all the cases where it is known to occur: two-photon absorption and the single-mode laser. We also provide some brief guidelines on how to apply the stochastic gauge method to other systems in general, quantify the freedom of choice in the resulting equations, and make a comparison to related recent developments.
Deuar Piotr
Drummond Peter D.
No associations
LandOfFree
Gauge P-representations for quantum-dynamical problems: Removal of boundary terms does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gauge P-representations for quantum-dynamical problems: Removal of boundary terms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gauge P-representations for quantum-dynamical problems: Removal of boundary terms will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-125275