Bringing Entanglement to the High Temperature Limit

2010/10/25 by Fernando Galve, Leonardo A. Pachón, David Zueco · 1 voice
Physics and Astronomy · Computer Science · #Advanced Thermodynamics and Statistical Mechanics #Quantum Information and Cryptography #Quantum Mechanics and Applications

paper · doi:10.1103/physrevlett.105.180501

openalex publication_date 2010/10/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Decoherence due to contact with a hot environment typically restricts quantum phenomena to the low temperature limit, k_BT/ℏω≪1 (ℏω is the typical energy of the system). Here we report the existence of a nonequilibrium state for two coupled, parametrically driven, dissipative harmonic oscillators which, contrary to generalized intuition, has stationary entanglement at high temperatures. This clarifies the role of temperature and could lighten the burden on quantum experiments requiring delicate precooling setups.

Citations

• Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?
• Quantum tunnelling in a dissipative system
• Decoherence, einselection, and the quantum origins of the classical
• Putting Mechanics into Quantum Mechanics

Discussions

• Think about two particles or spheres entangled (you need a cooling rate to be greater than the heating rate or those interactions), now you add some thermal noise (Temp) to one of them. As long as the [stackexchange, 1 points]

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