Entanglement Energetics at Zero Temperature

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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.
4 pages, 2 figures

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Mesoscale and Nanoscale Physics, Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/22796

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0311647
 http://arxiv.org/abs/cond-mat/0311647
 Phys. Rev. Lett. 92, 247901 (2004)
 doi:10.1103/PhysRevLett.92.247901

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