title: 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 a pure separable Gaussian field with high excitation. We show that it is possible to retrieve the entanglement back to qubits from the entangled CV systems. The deposition of multiple ebits from qubits to the initially separable CV systems is also pointed out. We show that the entanglement transfer and retrieval are done at a quasisteady state.
authors.affiliation: Department of Physics and Quantum Photonic Science Research Center, Hanyang University, Seoul 133-791, Korea.
authors.forename: Jinhyoung
authors.initials: J
authors.lastname: Lee
authors.forename: M
authors.initials: M
authors.lastname: Paternostro
authors.forename: M S
authors.initials: MS
authors.lastname: Kim
authors.forename: S
authors.initials: S
authors.lastname: Bose