Coupling bosonic modes with a qubit: entanglement dynamics at zero and finite-temperatures

Details Coupling bosonic modes with a qubit: entanglement dynamics at zero and finite-temperatures Coupling bosonic modes with a qubit: entanglement dynamics at zero and finite-temperatures

2005-11-11

arxiv.org/abs/quant-ph/0511114v1

Physics

Quantum Physics

8 pages, 7 figures

Scientific paper

10.1016/j.physleta.2006.07.067

We consider a system of two iso-spectral bosonic modes coupled with a single two-level systems i.e., a qubit. The dynamics is described by a mode-symmetric two-modes Jaynes-Cummings. The entanglement, induced between the two bosonic modes, is analyzed and quantified by negativity. We computed the time evolution of negativity starting from an initial thermal state of the bosonic sector for both zero and finite temperature. We also studied the entangling power of the interaction as a function of mode-qubit detuning and its resilience against temperature increase. Finally a two-qubit gates based on bosonic virtual subsystem is discussed.

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