title: Maxwell's demon assisted thermodynamic cycle in superconducting quantum circuits.
abstract: We study a new quantum heat engine (QHE), which is assisted by a Maxwell's demon. The QHE requires three steps: thermalization, quantum measurement, and quantum feedback controlled by the Maxwell demon. We derive the positive-work condition and operation efficiency of this composite QHE. Using controllable superconducting quantum circuits as an example, we show how to construct our QHE. The essential role of the demon is explicitly demonstrated in this macroscopic QHE.
authors.affiliation: Frontier Research System, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan.
authors.forename: H T
authors.initials: HT
authors.lastname: Quan
authors.forename: Y D
authors.initials: YD
authors.lastname: Wang
authors.forename: Yu-xi
authors.initials: YX
authors.lastname: Liu
authors.forename: C P
authors.initials: CP
authors.lastname: Sun
authors.forename: Franco
authors.initials: F
authors.lastname: Nori