Creation of Entanglement by Interaction with a Common Heat Bath

Details Creation of Entanglement by Interaction with a Common Heat Bath Creation of Entanglement by Interaction with a Common Heat Bath

2002-05-05

arxiv.org/abs/quant-ph/0205019v2

Phys. Rev. Lett. 89, 277901-4 (2002)

Physics

Quantum Physics

4 revtex pages, 1 eps figure; replaced with published version; short discussion on entanglement distillation added

Scientific paper

10.1103/PhysRevLett.89.277901

I show that entanglement between two qubits can be generated if the two qubits interact with a common heat bath in thermal equilibrium, but do not interact directly with each other. In most situations the entanglement is created for a very short time after the interaction with the heat bath is switched on, but depending on system, coupling, and heat bath, the entanglement may persist for arbitrarily long times. This mechanism sheds new light on the creation of entanglement. A particular example of two quantum dots in a closed cavity is discussed, where the heat bath is given by the blackbody radiation.

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