Reference : Post-Ehrenfest many-body quantum interferences in ultracold atoms far out of equilibrium
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/225677
Post-Ehrenfest many-body quantum interferences in ultracold atoms far out of equilibrium
English
Tomsovic, Steven [> >]
Schlagheck, Peter mailto [Université de Liège - ULiège > Département de physique > Physique quantique statistique >]
Ullmo, Denis [> >]
Urbina, Juan-Diego [> >]
Richter, Klaus [> >]
2018
Physical Review. A
American Physical Society
97
061606(R)
Yes (verified by ORBi)
International
1050-2947
1094-1622
MD
[en] 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.
Researchers
http://hdl.handle.net/2268/225677
10.1103/PhysRevA.97.061606

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