Entanglement Energetics in the Ground State
arXiv:quant-ph/0501017 · doi:10.1080/09500340408231799
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.
7 pages, 3 figures, Conference proceeding for the Physics of Quantum Electronics; Utah, USA, January 2004
References in corpus (8)
- Shot Noise Spectrum of Open Dissipative Quantum Two-level Systems
- Entanglement between a qubit and the environment in the spin-boson model
- Coulomb blockade of a noisy metallic box: A realization of Bose-Fermi Kondo models
- Entanglement Energetics at Zero Temperature
- Evidence of two-dimensional macroscopic quantum tunneling of a current-biased DC-SQUID
- One-shot quantum measurement using a hysteretic DC-SQUID
- Thermodynamics and small quantum systems
- Activation-like processes at zero temperature