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.

Lena, R., Palma, G., De Chiara, G. (2016). Work fluctuations in bosonic Josephson junctions. PHYSICAL REVIEW A, 93(5) [10.1103/PhysRevA.93.053618].

Work fluctuations in bosonic Josephson junctions

PALMA, Gioacchino Massimo;
2016-01-01

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.
2016
Lena, R., Palma, G., De Chiara, G. (2016). Work fluctuations in bosonic Josephson junctions. PHYSICAL REVIEW A, 93(5) [10.1103/PhysRevA.93.053618].
File in questo prodotto:
File Dimensione Formato  
2016 Sara PhysRevA.93.053618.pdf

accesso aperto

Dimensione 678.47 kB
Formato Adobe PDF
678.47 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/228260
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 8
social impact