2017/11/30 by Steven Tomsovic, Peter Schlagheck, Denis Ullmo +2
Physics and Astronomy · #Classical mechanics #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Interference (communication) #Physics #Quantum #Quantum chaos #Quantum dynamics #Quantum many-body systems #Quantum mechanics #Quantum, superfluid, helium dynamics #Semiclassical physics #Statistical physics #cond-mat.quant-gas #quant-ph
paper · pdf · doi:10.1103/physreva.97.061606
published as Phys. Rev. A 97, 061606 (2018) · 6 pages, 2 figures - the second version has a new Fig 1 with a new caption and remarks, more discussion around Eq. 2, and a changed final paragraph
arxiv created 2018/03/04 · openalex publication_date 2018/06/14 · arxiv updated 2018/06/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Far out-of-equilibrium many-body quantum dynamics in isolated systems necessarily generates interferences beyond an Ehrenfest timescale, where quantum and classical expectation values diverge. Of great recent interest is the role these interferences play in the spreading of quantum information across the many degrees of freedom, i.e., scrambling. Ultracold atomic gases provide a promising setting to explore these phenomena. Theoretically speaking, the heavily-relied-upon truncated Wigner approximation leaves out these interferences. We develop a semiclassical theory which bridges classical and quantum concepts in many-body bosonic systems and properly incorporates such missing quantum effects. For mesoscopically populated Bose-Hubbard systems, it is shown that this theory captures post-Ehrenfest quantum interference phenomena very accurately, and contains relevant phase information to perform many-body spectroscopy with high precision.