Entanglement Energetics at Zero Temperature

Details Entanglement Energetics at Zero Temperature Entanglement Energetics at Zero Temperature

2003-11-28

arxiv.org/abs/cond-mat/0311647v1

Phys. Rev. Lett. 92, 247901 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.92.247901

We show how many-body ground state entanglement information may be extracted from sub-system energy measurements at zero temperature. Generically, the larger the measured energy fluctuations are, the larger the entanglement is. Examples are given with the two-state system and the harmonic oscillator. Comparisons made with recent qubit experiments show this type of measurement provides another method to quantify entanglement with the environment.

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