Macroscopic superposition and entanglement for displaced thermal fields induced by a single atom

Details Macroscopic superposition and entanglement for displaced thermal fields induced by a single atom Macroscopic superposition and entanglement for displaced thermal fields induced by a single atom

2012-03-07

arxiv.org/abs/1203.1458v1

Phys. Rev. A 75, 032114 (2007)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.75.032114

We show that a cavity field can evolve from an initial displaced mixed thermal state to a macroscopic superpositions of displaced thermal states via resonant interaction with a two-level atom. As a macroscopic system (meter) is really in a mixed state before coupling with the microscopic system at some temperature, our result is important for studying the quantum measurement problem and decoherence under real conditions. For the two-mode case, entanglement of displaced thermal states between the modes can be obtained.

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