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

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

中国物理B ›› 2010, Vol. 19 ›› Issue (3): 34205-034205.doi: 10.1088/1674-1056/19/3/034205

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

吕海燕, 於亚飞, 张智明

Laboratory of Photonic Information Technology, SIPSE & LQIT, South China Normal University, Guangzhou 510006, China

收稿日期:2009-06-30 修回日期:2009-08-10 出版日期:2010-03-15 发布日期:2010-03-15
基金资助:
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).

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

LÜ Hai-Yan(吕海燕), Yu Ya-Fei(於亚飞), and Zhang Zhi-Ming(张智明)^†

Laboratory of Photonic Information Technology, SIPSE & LQIT, South China Normal University, Guangzhou 510006, China

Received:2009-06-30 Revised:2009-08-10 Online:2010-03-15 Published:2010-03-15
Supported by:
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).

摘要/Abstract

摘要： 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.

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.

Key words: Raman-coupled model, quantum computation, quantum phase gate

中图分类号: (Quantum computation architectures and implementations)

03.67.Lx

42.50.Pq (Cavity quantum electrodynamics; micromasers)

吕海燕, 於亚飞, 张智明. One-step implementation of an N-qubit quantum phase gate through a double Raman passage[J]. 中国物理B, 2010, 19(3): 34205-034205.

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[J]. Chin. Phys. B, 2010, 19(3): 34205-034205.

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

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

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