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Portrait of Ville Maisi. Photo: Kennet Ruona

Ville Maisi

Assistant Professor, Coordinator Quantum Physics

Portrait of Ville Maisi. Photo: Kennet Ruona

Minimally Dissipative Information Erasure in a Quantum Dot via Thermodynamic Length


  • Matteo Scandi
  • David Barker
  • Sebastian Lehmann
  • Kimberly A. Dick
  • Ville F. Maisi
  • Martí Perarnau-Llobet

Summary, in English

In this Letter, we explore the use of thermodynamic length to improve the performance of experimental protocols. In particular, we implement Landauer erasure on a driven electron level in a semiconductor quantum dot, and compare the standard protocol in which the energy is increased linearly in time with the one coming from geometric optimization. The latter is obtained by choosing a suitable metric structure, whose geodesics correspond to optimal finite-time thermodynamic protocols in the slow driving regime. We show experimentally that geodesic drivings minimize dissipation for slow protocols, with a bigger improvement as one approaches perfect erasure. Moreover, the geometric approach also leads to smaller dissipation even when the time of the protocol becomes comparable with the equilibration timescale of the system, i.e., away from the slow driving regime. Our results also illustrate, in a single-electron device, a fundamental principle of thermodynamic geometry: optimal finite-time thermodynamic protocols are those with constant dissipation rate along the process.


  • NanoLund: Center for Nanoscience
  • Solid State Physics
  • Centre for Analysis and Synthesis

Publishing year





Physical Review Letters





Document type

Journal article


American Physical Society


  • Condensed Matter Physics
  • Other Physics Topics




  • ISSN: 0031-9007