Work fluctuations in bosonic Josephson junctions

Gioacchino Massimo Palma, Gabriele De Chiara, De Chiara

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We calculate the first two moments and full probability distribution of the work performed on a system of bosonic particles in a two-mode Bose-Hubbard Hamiltonian when the self-interaction term is varied instantaneously or with a finite-time ramp. In the instantaneous case, we show how the irreversible work scales differently depending on whether the system is driven to the Josephson or Fock regime of the bosonic Josephson junction. In the finite-time case, we use optimal control techniques to substantially decrease the irreversible work to negligible values. Our analysis can be implemented in present-day experiments with ultracold atoms and we show how to relate the work statistics to that of the population imbalance of the two modes.
Original languageEnglish
Number of pages9
JournalPhysical Review A
Volume93
Publication statusPublished - 2016

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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