Engineering steady states using jump-based feedback for multipartite entanglement generation

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Stevenson, Ross N.
Hope, Joseph J.
Carvalho, Andre R. R.
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2011
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Abstract

We investigate the use of quantum-jump-based feedback to manipulate the stability of multipartite entangled dark states in an open quantum system. Using the model proposed in Phys. Rev. A 76, 010301(R) (2007) for a pair of atoms, we show a general strategy to produce many-body singlet stationary entangled states for larger number of atoms. In the case of four qubits, we propose a simple local feedback control that, although not optimal, is realistic and stabilizes a highly entangled state. We discuss the limitations and analyze alternative strategies within the framework of direct jump feedback schemes.

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Physical Review A - Atomic, Molecular, and Optical Physics

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84

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2

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© 2012 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.

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Quantum Physics not elsewhere classified

Mathematical Sciences

Physical Sciences

Chemical Sciences

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