Improving the entanglement transfer from continuous-variable systems to localized qubits using non-Gaussian states
作者： Federico Casagrande , Alfredo Lulli , Matteo G. A. Paris
DOI: 10.1103/PHYSREVA.75.032336
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摘要: We investigate the entanglement transfer from a bipartite continuous-variable (CV) system to pair of localized qubits assuming that each CV mode couples one qubit via off-resonance Jaynes-Cummings interaction with different times for two subsystems. First, we consider case prepared in Bell-like superposition and conditions maximum transfer. Then analyze general two-mode states can be represented by Schmidt decomposition Fock number basis. This class includes both Gaussian non-Gaussian states, as, example, twin-beam (TWB) pair-coherent (TMC, also known as two-mode-coherent) respectively. Under resonance conditions, equal initial preparations, find is more efficient TMC than TWB states. In perspective applications such cavity QED or superconducting qubits, detail effects interactions (detuning) discuss preserve
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