摘要An alternative protocol is proposed to implement three-qubit phase gate between photon and atoms in a high-Q bimodel optical cavity. The idea can be extended to directly implement N-qubit phase gate, and the gating time that is required to implement the protocol does not rise with increasing number of qubits. The influence of cavity decay and atomic spontaneous emission on the gate fidelity is also discussed.
Abstract：An alternative protocol is proposed to implement three-qubit phase gate between photon and atoms in a high-Q bimodel optical cavity. The idea can be extended to directly implement N-qubit phase gate, and the gating time that is required to implement the protocol does not rise with increasing number of qubits. The influence of cavity decay and atomic spontaneous emission on the gate fidelity is also discussed.
FAN Qiu-Bo. One-Step Implementation of Mulitqubit Quantum Phase Gate in a Cavity QED System[J]. 中国物理快报, 2008, 25(2): 379-382.
FAN Qiu-Bo. One-Step Implementation of Mulitqubit Quantum Phase Gate in a Cavity QED System. Chin. Phys. Lett., 2008, 25(2): 379-382.
[1] Sleator T and Weinfurter H 1995 Phys. Rev. Lett. 74 4087 [2]Charron E, Cirone M A, Negretti A, Schmiedmayer J and Calarco T2006 Phys. Rev. A 74 012308 [3]Chen C Y, Feng M, Zhang X L and Gao K L 2006 Phys. Rev. A 73 032344 [4]Unanyan R G and Fleischhauer M 2004 Phys. Rev. A 69 050302(R) [5]Kiesel N, Schmid C, Weber U, Ursin R and Weinfurter H 2005 Phys. Rev. Lett. 95 210505 [6]Zheng S B 2005 Phys. Rev. Lett. 95 080502 Zheng S B 2006 Phys. Rev. A 74 032322 Zheng S B 2007 Phys. Lett. A 362 165 [7]Song J, Xia Y, Song H S, Guo J L and Nie J 2007 Europhys.Lett. 80 60001 [8]Xia Y and Song H S 2007 Phys. Lett. A 364 117 [9]Zhu A D, Zhang S, Yeon K H, Yu S C and Um C I 2007 Chin.Phys. 16 1599 [10]Xiao Y F, Zou X B, Han Z F and Guo G C 2006 Phys. Rev. A 74 044303 [11]]Xiao Y F, Zou X B and Guo G C 2007 Phys. Rev. A 75 054303 [12]Shao X Q, Zhu A D, Zhang S, Chung J S andYeon K H 2007 Phys.Rev. A 75 034307 [13]Zou X B, Dong Y L and Guo G C 2006 Phys. Rev. A 74 032325 [14]Zou X B, Xiao Y F, Li S B, Yang Y and Guo G C 2007 Phys.Rev. A 75 064301 [15]Biswas A and Agarwal G S 2004 Phys. Rev. A 69 062306 [16]Garcia-Maraver R, Corbal\'{an R, Eckert K, Rebi\'{c S,Artoni M and Mompart J 2004 Phys. Rev. A 70 062324 [17]Joshi A and Xiao M 2006 Phys. Rev. A 74 052318 [18]Shu J, Zou X B, Xiao Y F and Guo G C 2007 Phys. Rev. A 75 044302 [19]Dasgupta S, Biswas A and Agarwal G S 2005 Phys. Rev. A 71 012333
2008, Vol. 25 
