Europhys. Lett.
Volume 72, Number 5, December 2005
Page(s) 747 - 753
Section Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics
Published online 03 November 2005
Europhys. Lett., 72 (5), pp. 747-753 (2005)
DOI: 10.1209/epl/i2005-10317-6

Entangling movable mirrors in a double-cavity system

M. Pinard1, A. Dantan1, D. Vitali2, O. Arcizet1, T. Briant1 and A. Heidmann1

1  Laboratoire Kastler Brossel, Université Pierre et Marie Curie Case 74, 4 place Jussieu, 75252 Paris Cedex 05, France
2  Dipartimento di Fisica, Università di Camerino - I-62032 Camerino, Italy

received 29 July 2005; accepted in final form 5 October 2005
published online 3 November 2005

We propose a double-cavity set-up capable of generating a stationary entangled state of two movable mirrors at cryogenic temperatures. The scheme is based on the optimal transfer of squeezing of input optical fields to mechanical vibrational modes of the mirrors, realized by the radiation pressure of the intracavity light. We show that the presence of macroscopic entanglement can be demonstrated by an appropriate readout of the output light of the two cavities.

42.50.Lc - Quantum fluctuations, quantum noise, and quantum jumps.
03.67.Mn - Entanglement production, characterization and manipulation.
05.40.Jc - Brownian motion.

© EDP Sciences 2005