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Revisiting the quantum Szilard engine with fully quantum considerations | | Hai Li
; Jian Zou
; Jun-Gang Li
; Bin Shao
; Lian-Ao Wu
; | | Date: |
20 Aug 2012 | | Abstract: | By considering level shifting during the insertion process we revisit the
quantum Szilard engine (QSZE) with fully quantum consideration. We derive the
general expressions of the heat absorbed from thermal bath and the total work
done to the environment by the system in a cycle with two different cyclic
strategies. We find that only the quantum information contributes to the
absorbed heat, and the classical information acts like a feedback controller
and has no direct effect on the absorbed heat. This is the first demonstration
of the different effects of quantum information and classical information for
extracting heat from the bath in the QSZE. Moreover, when the well width
$L
ightarrow infty $ or the temperature of the bath $T
ightarrow infty $
the QSZE reduces to the classical Szilard engine (CSZE), and the total work
satisfies the relation $W_{mathtt{tot}}=k_{B}T mathtt{ln}2$ as obtained by
Sang Wook Kim et al. [Phys. Rev. Lett. 106, 070401 (2011)] for one particle
case. | | Source: | arXiv, 1208.3985 | | Services: | Forum | Review | PDF | Favorites | |
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