Small quantum networks operating as quantum thermodynamic machines

Details Small quantum networks operating as quantum thermodynamic machines Small quantum networks operating as quantum thermodynamic machines

2006-04-07

arxiv.org/abs/cond-mat/0604202v2

Europhys. Lett., 76 (6), pp. 1057-1063 (2006)

Physics

Condensed Matter

Statistical Mechanics

RevTeX, 4 pages, 7 figures. Replaced by version accepted for publication in EPL

Scientific paper

10.1209/epl/i2006-10408-x

We show that a 3-qubit system as studied for quantum information purposes can alternatively be used as a thermodynamic machine when driven in finite time and interfaced between two split baths. The spins are arranged in a chain where the working spin in the middle exercises Carnot cycles the area of which defines the exchanged work. The cycle orientation (sign of the exchanged work) flips as the difference of bath temperatures goes through a critical value.

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