Implementation of a many-qubit Grover search by cavity QED  

作　　者：范浩权 杨万里 黄学人 冯芒 

机构地区：[1]State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences [2]Graduate School of the Chinese Academy of Sciences

出　　处：《Chinese Physics B》2009年第11期4893-4900,共8页中国物理B（英文版）

基　　金：Project supported by National Natural Science Foundation of China (Grant Nos 10474118, 60490280 and 10774161);partly by the National Fundamental Research Program of China (Grants Nos 2005CB724502 and 2006CB921203)

摘　　要：We explore the possibility of an N-qubit （N 〉 3） Grover search in cavity QED, based on a fast operation of an N-qubit controlled phase-flip with atoms in resonance with the cavity mode. We demonstrate both analytically and numerically that our scheme can be achieved efficiently to find a marked state with high fidelity and high success probability. As an example, a ten-qubit Grover search is simulated specifically under the discussion of experimental feasibility and challenge. We argue that our scheme is applicable to the case involving an arbitrary number of qubits. As cavity decay is involved in our quantum trajectory treatment, we can analytically understand the implementation of a Grover search subject to dissipation, which will be very helpful for relevant experiments.We explore the possibility of an N-qubit （N 〉 3） Grover search in cavity QED, based on a fast operation of an N-qubit controlled phase-flip with atoms in resonance with the cavity mode. We demonstrate both analytically and numerically that our scheme can be achieved efficiently to find a marked state with high fidelity and high success probability. As an example, a ten-qubit Grover search is simulated specifically under the discussion of experimental feasibility and challenge. We argue that our scheme is applicable to the case involving an arbitrary number of qubits. As cavity decay is involved in our quantum trajectory treatment, we can analytically understand the implementation of a Grover search subject to dissipation, which will be very helpful for relevant experiments.

关 键 词：cavity QED Grover search controlled phase flip gate 

分 类 号：O431.2[机械工程—光学工程]