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Entanglement energetics in the ground state
|Published in||Journal of Modern Optics. 2004, vol. 51, no. 16-18, p. 2405-2414|
|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.|
|Keywords||Theoretical study — Thermodynamic analysis — Probability distribution — Energy distribution — Weak coupling — Harmonic oscillators — Information extraction — Quantum information — N-body problems — Ground states — Entangled states — Quantum entanglement|
|JORDAN, Andrew N., BUTTIKER, Markus. Entanglement energetics in the ground state. In: Journal of Modern Optics, 2004, vol. 51, n° 16-18, p. 2405-2414. https://archive-ouverte.unige.ch/unige:4197|