Accumulation of entanglement in a continuous variable memory

Abstract

We study the accumulation of entanglement in a memory device built out of two continuous variable (CV) systems. We address the case of a qubit mediating an indirect joint interaction between the CV systems. We show that, in striking contrast with respect to registers built out of bidimensional Hilbert spaces, entanglement superior to a single ebit can be efficiently accumulated in the memory, even though no entangled resource is used. We study the protocol in an immediately implementable setup, assessing the effects of the main imperfections.

4 pages, 3 figures, RevTeX4

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Cited by in corpus (10)

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• Nested entangled states for distributed quantum channels
• Reducing quantum control for spin-spin entanglement distribution
• Broadcasting of continuous variable entanglement
• Entanglement reciprocation using three level atoms in a lambda configuration
• Entanglement accumulation, retrieval, and concentration in cavity QED
• Thermally induced entanglement of atomic oscillators
• Entanglement sharing in $E\otimes \epsilon$ Jahn-Teller model in the presence of a magnetic field
• Qubit Mediated Time Robust Entangling of Oscillators in Thermal Environments
• Distributed manipulation of two-qubit entanglement with coupled continuous variables