Simple scheme for extracting work with a single bath

Anna Napoli, Benedetto Militello, Anna Napoli, Nicolò Piccione, Benedetto Militello, Bruno Bellomo

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We propose a simple protocol exploiting the thermalization of a storage bipartite system S to extract work from a resource system R. The protocol is based on a recent work definition involving only a single bath. A general description of the protocol is provided without specifying the characteristics of S. We quantify both the extracted work and the ideal efficiency of the process, also giving maximum bounds for them. Then, we apply the protocol to two cases: two interacting qubits and the Rabi model. In both cases, for very strong couplings, an extraction of work comparable with the bare energies of the subsystems of S is obtained and its peak is reached for finite values of the bath temperature, T. We finally show, in the Rabi model at T=0, how to transfer the work stored in S to an external device, permitting thus a cyclic implementation of the whole work-extraction protocol. Our proposal makes use of simple operations not needing fine control.
Lingua originaleEnglish
pagine (da-a)032143-1-032143-12
Numero di pagine12
Stato di pubblicazionePublished - 2019

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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    Napoli, A., Militello, B., Napoli, A., Piccione, N., Militello, B., & Bellomo, B. (2019). Simple scheme for extracting work with a single bath. PHYSICAL REVIEW. E, 100, 032143-1-032143-12.