Dynamics of a Raman coupled model: entanglement and quantum computation

Larson, J and Garraway, B M (2004) Dynamics of a Raman coupled model: entanglement and quantum computation. Journal of Modern Optics, 51 (11). pp. 1691-1704. ISSN 0950-0340

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Abstract

The evolution of a Raman coupled three-level N-atom with two quantized cavity modes is studied in the large detuning case; i.e. when the upper atomic level can be adiabatically eliminated. Particularly the situation when the two modes are prepared in initial coherent or squeezed states, with a large average number of photons, is investigated. It is found that the atom, after specific interaction times, disentangles from the two modes, leaving them, in certain cases, in entangled SchrC6dinger cat states. These disentanglement times can be controlled by adjusting the ratio between average numbers of photons in the two modes. It is also shown how this effective model may be used for implementing quantum information processing. Especially it is demonstrated how to generate various entangled states, such as EPR and GHZ states, and quantum logic operations, such as the control-not and the phase gate.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Barry Garraway
Date Deposited: 06 Feb 2012 20:00
Last Modified: 05 Jul 2013 12:20
URI: http://sro.sussex.ac.uk/id/eprint/23492
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