Multi-Particle Quantum Szilard Engine with Optimal Cycles Assisted by a Maxwell's Demon

Details Multi-Particle Quantum Szilard Engine with Optimal Cycles Assisted by a Maxwell's Demon Multi-Particle Quantum Szilard Engine with Optimal Cycles Assisted by a Maxwell's Demon

2011-11-22

arxiv.org/abs/1111.5074v2

Phys. Rev. E 85, 031114 (2012)

Physics

Quantum Physics

14 pages, 9 figures

Scientific paper

10.1103/PhysRevE.85.031114

We present a complete-quantum description of multi-particle Szilard engine which consists of a working substance and a Maxwell's demon. The demon is modeled as a multi-level quantum system with specific quantum control and the working substance consists of identical particles obeying Bose-Einstein or Fermi-Dirac statistics. In this description, a reversible scheme to erase the demon's memory by a lower temperature heat bath is used. We demonstrate that (1) the quantum control of the demon can be optimized for single-particle Szilard engine so that the efficiency of the demon-assisted thermodynamic cycle could reach the Carnot cycle's efficiency; (2) the low-temperature behavior of the working substance is very sensitive to the quantum statistics of the particles and the insertion position of the partition.

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