Entanglement reciprocation between qubits and continuous variables

Abstract

We investigate how entanglement can be transferred between qubits and continuous variable (CV) systems. We find that one ebit borne in maximally entangled qubits can be fully transferred to two CV systems which are initially prepared in pure separable Gaussian field with high excitation. We show that it is possible, though not straightforward, to retrieve the entanglement back to qubits from the entangled CV systems. The possibility of deposition of multiple ebits from qubits to the initially unentangled CV systems is also pointed out.

4 pages, 3 figures, RevTeX4

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• Qubit Mediated Time Robust Entangling of Oscillators in Thermal Environments
• Distributed manipulation of two-qubit entanglement with coupled continuous variables
• Qubit-Initialisation and Readout with Finite Coherent Amplitudes in Cavity QED