Entanglement, correlations, and the energy gap in many-body quantum systems

What correlations are present in the ground state of a many-body Hamiltonian? We study the relationship between ground-state correlations, especially entanglement, and the energy gap between the ground and first excited states. We prove several general inequalities which show quantitatively that gro...

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Veröffentlicht in:	Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2004-03, Vol.69 (3), Article 032303
Hauptverfasser:	Haselgrove, Henry L., Nielsen, Michael A., Osborne, Tobias J.
Format:	Artikel
Sprache:	eng
Schlagworte:	ATOMIC AND MOLECULAR PHYSICS CORRELATIONS ENERGY GAP EXCITED STATES GROUND STATES HAMILTONIANS MANY-BODY PROBLEM
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