Entanglement in thermal equilibrium states

Entanglement in thermal equilibrium states

We reconsider the problem of entanglement of thermal equilibrium states of composite systems. We introduce characteristic, viz., critical, temperatures--and bounds for them--marking transitions from entanglement to separability, or vice versa. We present examples for the various possible thermal ent...

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Veröffentlicht in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2005-12, Vol.72 (6)
Hauptverfasser: Osenda, O., Raggio, G. A.
Format: Artikel
Sprache:eng
Schlagworte:
ATOMIC AND MOLECULAR PHYSICS
CRITICAL TEMPERATURE
ENERGY LEVELS
QUANTUM COMPUTERS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUBITS
THERMAL EQUILIBRIUM
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Zusammenfassung:We reconsider the problem of entanglement of thermal equilibrium states of composite systems. We introduce characteristic, viz., critical, temperatures--and bounds for them--marking transitions from entanglement to separability, or vice versa. We present examples for the various possible thermal entanglement scenarios in bipartite qubit-qubit and qubit-qutrit systems.
ISSN:1050-2947
1094-1622
DOI:10.1103/PHYSREVA.72.0