Physics – Condensed Matter – Quantum Gases
Scientific paper
2010-08-02
Phys. Rev. A 82, 023620 (2010)
Physics
Condensed Matter
Quantum Gases
7 pages, 7 png figures, accepted for publication in Phys. Rev. A
Scientific paper
10.1103/PhysRevA.82.023620
In a parameter regime for which the mean-field (Gross-Pitaevskii) dynamics becomes chaotic, mesoscopic quantum superpositions in phase space can occur in a double-well potential which is shaken periodically. For experimentally realistic initial states like the ground state of some 100 atoms, the emergence of mesoscopic quantum superpositions in phase space is investigated numerically. It is shown to be reproducible even if the initial conditions slightly change. While the final state is not a perfect superposition of two distinct phase-states, the superposition is reached an order of magnitude faster than in the case of the collapse and revival phenomenon. Furthermore, a generator of entanglement is identified.
Arlinghaus Stephan
Gertjerenken Bettina
Teichmann Niklas
Weiss Christoph
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