Differences between mean-field dynamics and N-particle quantum dynamics as a signature of entanglement
arXiv:0805.0531 · doi:10.1103/PhysRevLett.100.140408
Abstract
A Bose-Einstein condensate in a tilted double-well potential under the influence of time-periodic potential differences is investigated in the regime where the mean-field (Gross-Pitaevskii) dynamics become chaotic. For some parameters near stable regions, even averaging over several condensate oscillations does not remove the differences between mean-field and N-particle results. While introducing decoherence via piecewise deterministic processes reduces those differences, they are due to the emergence of mesoscopic entangled states in the chaotic regime.
four pages, five figures
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- Floquet analysis of the modulated two-mode Bose-Hubbard model
- Quantum switching at a mean-field instability of a Bose-Einstein condensate in an optical lattice
- Reproducible mesoscopic superpositions of Bose-Einstein condensates and mean-field chaos
- Trojan quasiparticles
- Influence of the particle number on the spin dynamics of ultracold atoms
- Emergence of nonlinear behavior in the dynamics of ultracold bosons
- Quasiparticle tunneling in a periodically driven bosonic Josephson junction
- Quantum recurrence and fractional dynamic localization in ac-driven perfect state transfer Hamiltonians