Nondestructive interaction-free atom-photon controlled-NOT gate

Details Nondestructive interaction-free atom-photon controlled-NOT gate Nondestructive interaction-free atom-photon controlled-NOT gate

2007-08-17

arxiv.org/abs/0708.2302v1

Physical Review A, 75, 032342 (2007); Virtual Journal of Quantum Information, Volume 7, Issue 4

Physics

Quantum Physics

20 pages, 5 figures, Web page: http://m3k.grad.hr/pavicic

Scientific paper

10.1103/PhysRevA.75.032342

We present a probabilistic (ideally 50%) nondestructive interaction-free atom-photon controlled-NOT gate, where nondestructive means that all four outgoing target photon modes of the gate are available and feed-forwardable. Individual atoms are controlled by a stimulated Raman adiabatic passage transition and photons by a ring resonator with two outgoing ports. Realistic estimates we obtain for ions confined in a Paul trap around which the resonator is mounted show that a strong atom-photon coupling can be achieved. It is also shown how the resonator can be used for controlling superposition of atom states.

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