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Maxwell's demon in a double quantum dot with continuous charge detection

  • Björn Annby-Andersson
  • Peter Samuelsson
  • Ville F. Maisi
  • Patrick P. Potts
Publishing year: 2020-04-06
Language: English
Publication/Series: Physical Review B
Volume: 101
Issue: 16
Document type: Journal article
Publisher: American Physical Society

Abstract english

Converting information into work has, during the past decade, gained renewed interest as it gives insight into the relation between information theory and thermodynamics. Here, we theoretically investigate an implementation of Maxwell's demon in a double quantum dot and demonstrate how heat can be converted into work using only information. This is accomplished by continuously monitoring the charge state of the quantum dots and transferring electrons against a voltage bias using a feedback scheme. We investigate the electrical work produced by the demon and find a non-Gaussian work distribution. To illustrate the effect of a realistic charge detection scheme, we develop a model taking into account noise as well as a finite delay time and show that an experimental realization is feasible with present day technology. Depending on the accuracy of the measurement, the system is operated as an implementation of Maxwell's demon or a single-electron pump.


  • Atom and Molecular Physics and Optics
  • Control Engineering


  • ISSN: 2469-9950
Portrait of Patrick Potts
E-mail: patrick [dot] potts [at] teorfys [dot] lu [dot] se

Postdoctoral fellow

Mathematical Physics


Postdoctoral fellow