Issue
EPL
Volume 85, Number 2, January 2009
Article Number 20007
Number of page(s) 6
Section General
DOI http://dx.doi.org/10.1209/0295-5075/85/20007
Published online 30 January 2009
EPL, 85 (2009) 20007
DOI: 10.1209/0295-5075/85/20007

Steady-state entanglement between hybrid light-matter qubits

D. G. Angelakis1, 2, S. Bose3 and S. Mancini4

1   Science Department, Technical University of Crete - 73100 Chania, Greece, EU
2   Centre for Quantum Technologies, National University of Singapore - 2 Science Drive 3, 117542 Singapore
3   Department of Physics and Astronomy, University College London - London WC1E 6BT, UK, EU
4   Dipartimento di Fisica, Università di Camerino - 62032 Camerino, Italy, EU

dimitris.angelakis@gmail.com

received 12 October 2008; accepted in final form 18 December 2008; published January 2009
published online 30 January 2009

Abstract
We study the case of two polaritonic qubits localized in two separate cavities coupled by a fiber/additional cavity. We show that classical driving of the intermediate cavity/fiber can lead to the creation of entanglement between the two ends in the steady state. The stationary nature of this entanglement and its survival under dissipation opens possibilities for its production under realistic laboratory conditions. To facilitate the verification of the entanglement in an experiment we also construct the relevant entanglement witness measurable by accessing only a few local variables of each polaritonic qubit.

PACS
03.67.Mn - Entanglement measures, witnesses and other characterizations.
42.50.Ct - Quantum description of interaction of light and matter; related experiments.
03.65.Yz - Decoherence; open systems; quantum statistical methods.

© EPLA 2009