• Rapid Communication

Entangling two defects via a surrounding crystal

T. Fogarty, E. Kajari, B. G. Taketani, A. Wolf, Th. Busch, and Giovanna Morigi
Phys. Rev. A 87, 050304(R) – Published 28 May 2013

Abstract

We theoretically show how two impurity defects in a crystalline structure can be entangled through coupling with the crystal. We demonstrate this with a harmonic chain of trapped ions in which two ions of a different species are embedded. Entanglement is found for sufficiently cold chains and for a certain class of initial, separable states of the defects. It results from the interplay between localized modes which involve the defects and the interposed ions, it is independent of the chain size, and it decays slowly with the distance between the impurities. These dynamics can be observed in systems exhibiting spatial order; viable realizations are optical lattices, optomechanical systems, or cavity arrays in circuit QED.

  • Received 6 August 2012

DOI:https://doi.org/10.1103/PhysRevA.87.050304

©2013 American Physical Society

Authors & Affiliations

T. Fogarty1,2, E. Kajari3, B. G. Taketani3, A. Wolf3, Th. Busch1,2, and Giovanna Morigi3,4

  • 1Physics Department, University College Cork, Cork, Ireland
  • 2Quantum Systems Unit, Okinawa Institute of Science and Technology, Okinawa 904-0495, Japan
  • 3Theoretische Physik, Universität des Saarlandes, D-66123 Saarbrücken, Germany
  • 4Departament de Fisíca, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 87, Iss. 5 — May 2013

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×