Scheme for Implementing an N-Qubit Phase Gate via Selective Atom--Field Interaction with Cavity Quantum Electrodynamics
SHAO Xiao-Qiang1, JIN Xing-Ri1, ZHU Ai-Dong1,2, ZHANG Shou1,2, YEON Kyu-Hwang3
1Department of Physics, College of Science, Yanbian University, Yanji 133002 2Center for the Condensed-Matter Science and Technology, Harbin Institute of Technology, Harbin 1500013BK21 Program Physics & Department of Physics, College of Natural Science, Chungbuk National University, Cheonju, Chungbuk 361-763, Republic of Korea
Scheme for Implementing an N-Qubit Phase Gate via Selective Atom--Field Interaction with Cavity Quantum Electrodynamics
1Department of Physics, College of Science, Yanbian University, Yanji 133002 2Center for the Condensed-Matter Science and Technology, Harbin Institute of Technology, Harbin 1500013BK21 Program Physics & Department of Physics, College of Natural Science, Chungbuk National University, Cheonju, Chungbuk 361-763, Republic of Korea
摘要A scheme for implementing a two-qubit phase gate with atoms sent through a high-Q optical cavity is proposed by choosing nonidentical coupling constants between the atoms and cavity. The atomic spontaneous emission can be suppressed due to the large atom--field detuning. Moreover, the scheme can be generalized to implement an N-qubit phase gate and the gating time does not change with an increase of the number of qubits.
A scheme for implementing a two-qubit phase gate with atoms sent through a high-Q optical cavity is proposed by choosing nonidentical coupling constants between the atoms and cavity. The atomic spontaneous emission can be suppressed due to the large atom--field detuning. Moreover, the scheme can be generalized to implement an N-qubit phase gate and the gating time does not change with an increase of the number of qubits.
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2008, Vol. 25 
