Entanglement Energetics in the Ground State
Quantum Physics
2009-11-11 v1 Mesoscale and Nanoscale Physics
Abstract
We show how many-body ground state entanglement information may be extracted from sub-system energy measurements at zero temperature. A precise relation between entanglement and energy fluctuations is demonstrated in the weak coupling limit. Examples are given with the two-state system and the harmonic oscillator, and energy probability distributions are calculated. Comparisons made with recent qubit experiments show this type of measurement provides another method to quantify entanglement with the environment.
Cite
@article{arxiv.quant-ph/0501017,
title = {Entanglement Energetics in the Ground State},
author = {Andrew N. Jordan and Markus Buttiker},
journal= {arXiv preprint arXiv:quant-ph/0501017},
year = {2009}
}
Comments
7 pages, 3 figures, Conference proceeding for the Physics of Quantum Electronics; Utah, USA, January 2004