Dynamical creation of entanglement by homodyne-mediated feedback

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Title Dynamical creation of entanglement by homodyne-mediated feedback
Author Wang, Jin; Wiseman, Howard Mark; Milburn, G.J.
Journal Name Physical Review A
Year Published 2005
Place of publication USA
Publisher American Physical Society
Abstract For two two-level atoms coupled to a single Bosonic mode that is driven and heavily damped, the steady state can be entangled by resonantly driving the system [S. Schneider and G. J. Milburn, Phys. Rev. A 65, 042107 (2002)]. We present a scheme to significantly increase the steady-state entanglement by using homodyne-mediated feedback, in which the Bosonic mode is that of an electromagnetic cavity, the output of which is measured and the resulting homodyne photocurrent is used to modulate the field driving the qubits. Such feedback can increase the nonlinear response to both the decoherence process of the two-qubit system and the coherent evolution of individual qubits. We present the properties of the entangled states using the SO(3) Q function.
Peer Reviewed Yes
Published Yes
Publisher URI http://pra.aps.org/
Alternative URI http://dx.doi.org/10.1103/PhysRevA.71.042309
Copyright Statement Copyright 2005 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 71
Page from 042309.1
Page to 042309.9
ISSN 1050-2947
Date Accessioned 2006-02-23
Language en_AU
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science
Subject PRE2009-Quantum Optics and Lasers
URI http://hdl.handle.net/10072/4931
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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