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arXiv · 0808.0676

System-bath entanglement in nanothermodynamics

Stefanie Hilt·Eric Lutz
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Abstract

We consider a quantum harmonic oscillator linearly coupled to a bath of harmonic oscillators and evaluate the degree of entanglement between system and bath using the negativity as an exact entanglement measure. We establish the existence of a critical temperature above which the system-bath negativity vanishes. Our results imply that system-bath entanglement is not responsible for the violation of the Clausius inequality observed in the low temperature/strong coupling regime [Phys. Rev. Lett. 85, 1799 (2000)], as the latter still occurs well above the critical temperature.

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Stefanie Hilt, Eric Lutz. 2008-08-05. System-bath entanglement in nanothermodynamics. https://doi.org/10.1103/physreva.79.010101

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