Dynamical entanglement transfer for quantum-information networks

Mauro Paternostro, W. Son, Myungshik Kim, G. Falci, Massimo Palma

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

Abstract

A key element in the architecture of a quantum-information processing network is a reliable physical interface between fields and qubits. We study a process of entanglement transfer engineering, where two remote qubits respectively interact with an entangled two-mode continuous-variable (CV) field. We quantify the entanglement induced in the qubit state at the expenses of the loss of entanglement in the CV system. We discuss the range of mixed entangled states which can be obtained with this setup. Furthermore, we suggest a protocol to determine the residual entangling power of the light fields inferring, thus, the entanglement left in the field modes which, after the interaction, are no longer in a Gaussian state. Two different setups are proposed: a cavity-QED system and an interface between superconducting qubits and field modes. We address in detail the practical difficulties inherent in these two proposals, showing that the latter is promising in many aspects.
Original languageEnglish
Pages (from-to)022320-022321
Number of pages2
JournalPhysical Review A
Volume70
Issue number2
DOIs
Publication statusPublished - Aug 2004

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)

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