6533b7d6fe1ef96bd1266697
RESEARCH PRODUCT
Work fluctuations in bosonic Josephson junctions
R. G. LenaG. De ChiaraG. M. Palmasubject
---Josephson effectPopulationFOS: Physical sciences01 natural sciencesSettore FIS/03 - Fisica Della Materia010305 fluids & plasmasFock spacesymbols.namesakequant-phUltracold atomQuantum mechanics0103 physical sciences010306 general physicseducationPhysicsCondensed Matter::Quantum GasesQuantum Physicseducation.field_of_studyOptimal controlAtomic and Molecular Physics and OpticsQuantum Gases (cond-mat.quant-gas)symbolsProbability distributionCondensed Matter - Quantum GasesHamiltonian (quantum mechanics)Quantum Physics (quant-ph)cond-mat.quant-gasdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-03-18 |