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Chaos and two-level dynamics of the Atomtronic Quantum Interference Device

We study the Atomtronics Quantum Interference Device employing a semiclassical perspective. We consider an $M$ site ring that is described by the Bose-Hubbard Hamiltonian. Coherent Rabi oscillations in the flow of the current are feasible, with an enhanced frequency due to to chaos-assisted tunneling. We highlight the consequences of introducing a weak-link into the circuit. In the latter context we clarify the phase-space considerations that are involved in setting up an effective "systems plus bath" description in terms of Josephson-Caldeira-Leggett Hamiltonian.

preprint2015arXivOpen access
Geva ArwasDoron Cohen
cond-mat.quant-gasquant-ph
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Geva ArwasDoron Cohen

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