One-step implementation of an N-qubit quantum phase gate through a double Raman passage

doi:10.1088/1674-1056/19/3/034205

Abstract We propose a scheme for controllably implementing an N-qubit phase gate by one step within a ground-state subspace of N three-state atoms trapped in a cavity through a double Raman passage. We can extend our scheme to the realisation of an arbitrary N-qubit phase gate by appropriately adjusting coupling strengths and detunings between atoms and external driving fields. The advantage of this one-step scheme is its robustness against decoherence.

Keywords: Raman-coupled model quantum computation quantum phase gate

Received: 30 June 2009
Revised: 10 August 2009
Accepted manuscript online:

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

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos.~60578055 and 60978009) and the National Basic Research Program of China(Grant Nos.~2007CB925204 and 2009CB929604).

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LÜ Hai-Yan(吕海燕), Yu Ya-Fei(於亚飞), and Zhang Zhi-Ming(张智明) One-step implementation of an N-qubit quantum phase gate through a double Raman passage 2010 Chin. Phys. B 19 034205

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One-step implementation of an N-qubit quantum phase gate through a double Raman passage

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