Quantum logic operations on two distant atoms trapped in two optical-fibre-connected cavities

doi:10.1088/1674-1056/20/12/120310

Abstract Based on the coupling of two distant three-level atoms in two separate optical cavities connected with two optical fibres, schemes on the generation of several two-qubit logic gates are discussed under the conditions of $\varDelta=\delta-2\nu\cos\pi k/2\gg g/2$ and $\nu\sim g$. Discussion and analysis of the fidelity, gate time and experimental setups show that our schemes are feasible with current optical cavity, atomic trap and optical fibre techniques. Moreover, the atom--cavity--fibre coupling can be used to generate an $N$-qubit nonlocal entanglement and transfer quantum information among $N$ distant atoms by arranging $N$ atom--cavity assemblages in a line and connecting each two adjacent cavities with two optical fibres.

Keywords: quantum logic gate cavity QED optical fibre

Received: 18 April 2011
Revised: 17 May 2011
Accepted manuscript online:

PACS:	03.67.Lx	(Quantum computation architectures and implementations)
	42.50.Pq	(Cavity quantum electrodynamics; micromasers)

Cite this article:

Zhang Ying-Qiao(张英俏), Zhang Shou(张寿), Yeon Kyu-Hwang, and Yu Seong-Cho Quantum logic operations on two distant atoms trapped in two optical-fibre-connected cavities 2011 Chin. Phys. B 20 120310

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Quantum logic operations on two distant atoms trapped in two optical-fibre-connected cavities

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