Enhanced dynamical entanglement transfer with multiple qubits

A. Serafini, Mauro Paternostro, Myungshik Kim, S. Bose

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


We present two strategies to enhance the dynamical entanglement transfer from continuous-variable (CV) to finite-dimensional systems by employing multiple qubits. First, we consider the entanglement transfer to a composite finite-dimensional system of many qubits simultaneously interacting with a bipartite CV field. We show that, considering realistic conditions in the generation of CV entanglement, a small number of qubits resonantly coupled to the CV system are sufficient for an almost complete dynamical transfer of the entanglement. Our analysis also sheds further light on the transition between the microscopic and macroscopic behaviors of composite finite-dimensional systems coupled to bosonic fields (like atomic clouds interacting with light). Furthermore, we present a protocol based on sequential interactions of the CV system with some ancillary qubit systems and on subsequent measurements, allowing us to probabilistically convert CV entanglement into "almost-perfect" Bell pairs of two qubits. Our proposals are suited for realizations in various experimental settings, ranging from cavity-QED to cavity-integrated superconducting devices.
Original languageEnglish
Pages (from-to)022312-022313
Number of pages2
JournalPhysical Review A
Issue number2
Publication statusPublished - 2006

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Atomic and Molecular Physics, and Optics


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