1995/11/13 by Arlen Anderson, Anderson, Arlen
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Quantum Mechanics and Applications #Quantum Physics (quant-ph) #gr-qc #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/9511014
Latex, 16 pp. This is a contribution to the proceedings of the 4th Drexel Symposium on Quantum Nonintegrability, Drexel University, Sep. 1994
arxiv created 1995/11/13 · openalex publication_date 1995/11/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Experimentally, certain degrees of freedom may appear classical because their quantum fluctuations are smaller than the experimental error associated with measuring them. An approximation to a fully quantum theory is described in which the self-interference of such ``quasiclassical'' variables is neglected so that they behave classically when not coupled to other quantum variables. Coupling to quantum variables can lead to evolution in which quasiclassical variables do not have definite values, but values which are correlated to the state of the quantum variables. A mathematical description implementing this backreaction of the quantum variables on the quasiclassical variables is critically discussed.