Transferring entanglement to the steady state of flying qubits

Yanqiang Guo*, Jie Li, Tiancai Zhang, Mauro Paternostro

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The transfer of entanglement from optical fields to qubits provides a viable approach to entangling remote qubits in a quantum network. In cavity quantum electrodynamics, the scheme relies on the interaction between a photonic resource and two stationary intracavity atomic qubits. However, it might be hard in practice to trap two atoms simultaneously and synchronize their coupling to the cavities. To address this point, we propose and study entanglement transfer from cavities driven by an entangled external field to controlled flying qubits. We consider two exemplary non-Gaussian driving fields: NOON and entangled coherent states. We show that in the limit of long coherence time of the cavity fields, when the dynamics is approximately unitary, entanglement is transferred from the driving field to two atomic qubits that cross the cavities. On the other hand, a dissipation-dominated dynamics leads to very weakly quantum-correlated atomic systems, as witnessed by vanishing quantum discord.

Original languageEnglish
Article number052315
Number of pages7
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Volume86
Issue number5
DOIs
Publication statusPublished - 12 Nov 2012

Keywords

  • HIGH-NOON STATES
  • SINGLE-ATOM
  • QUANTUM METROLOGY
  • GENERATION
  • OPTICS
  • CAVITY

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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