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Conditional generation of highly excited Dicke states for N atoms via a single asymmetric atom–cavity interaction

Shi-Biao Zheng

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We propose a scheme for the generation of highly excited Dicke states for multiple atoms. In the scheme N + 1 atoms dispersively interact with a vacuum cavity, with the last atom having a different coupling and driven by a classical field. As the first N atoms are symmetric, they remain in the symmetric Dicke subspace, with the spacing of energy levels being unequal due to the vacuum light shift. Employing the Stark shift induced by the classical field, one can tune the last atom in resonance with the transition between two specific Dicke states of the first N atoms. So the detection of the state of the last atom conditionally collapses the first N atoms to the desired Dicke state.


PACS

42.50.Dv Quantum state engineering and measurements

03.65.Ud Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)

Subjects

Optics, quantum optics and lasers

Quantum information and quantum mechanics

Dates

Issue 8 (28 April 2009)

Received 29 December 2008, in final form 27 February 2009

Published 30 March 2009



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