Measurement of Stochastic Entropy Production

Details Measurement of Stochastic Entropy Production Measurement of Stochastic Entropy Production

2006-07-17

arxiv.org/abs/cond-mat/0607407v1

Phys. Rev. Lett. 97, 050602 (2006)

Physics

Condensed Matter

Statistical Mechanics

Phys. Rev. Lett., in press

Scientific paper

10.1103/PhysRevLett.97.050602

Using fluorescence spectroscopy we directly measure entropy production of a single two-level system realized experimentally as an optically driven defect center in diamond. We exploit a recent suggestion to define entropy on the level of a single stochastic trajectory (Seifert, Phys. Rev. Lett. {\bf 95}, 040602 (2005)). Entropy production can then be split into one of the system itself and one of the surrounding medium. We demonstrate that the total entropy production obeys various exact relations for finite time trajectories.

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