Quantum boomerang effect for interacting particles
arXiv:2003.09903 · doi:10.1103/PhysRevA.102.013303
Abstract
When a quantum particle is launched with a finite velocity in a disordered potential, it may surprisingly come back to its initial position at long times and remain there forever. This phenomenon, dubbed ``quantum boomerang effect'', was introduced in [Phys. Rev. A 99, 023629 (2019)]. Interactions between particles, treated within the mean-field approximation, are shown to partially destroy the boomerang effect: the center of mass of the wave packet makes a U-turn, but does not completely come back to its initial position. We show that this phenomenon can be quantitatively interpreted using a single parameter, the average interaction energy.
arXiv comment7 + 2 pages, 9 + 2 figures, added discussion about strong disorder case in Conclusion
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- Quantum boomerang effect in systems without time reversal symmetry
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