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理论物理通讯：英文版

A Scheme of Conditional Quantum Phase Gate for Dissipative Cavity QED System

Cai, Jianwu, Fang, Mao-Fa, Liao, Xiangping, Zheng Zheng, Xiao-Juan

Published Jan 1, 2006• 0 citations
OpenAlex

Abstract

我们建议一个计划实现 two-qubit 经由四水平的原子由古典激光帮助了的一个单个模式洞和串联的有条件的量阶段门。量信息在洞模式的 Fock 状态和原子的二个亚稳的地面状态上被编码。甚至在系统的驱散的条件下面，这个计划能也与 98.6% 的忠实和 0.767 的成功概率被认识到。

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我们建议一个计划实现 two-qubit 经由四水平的原子由古典激光帮助了的一个单个模式洞和串联的有条件的量阶段门。量信息在洞模式的 Fock 状态和原子的二个亚稳的地面状态上被编码。甚至在系统的驱散的条件下面，这个计划能也与 98.6% 的忠实和 0.767 的成功概率被认识到。
A scheme is proposed to realize a two-qubit quantum phase gate for the intracavity modes. In the scheme, two qubits are encoded in zero- and one-photon Fock states of two intracavity modes, and the three-level $\ensuremath{\Lambda}$-type atom trapped in a high-QQQ cavity mediates the conditional phase gate within a given interaction time. The influence of cavity decay and atomic spontaneous emission on the gate fidelity is also discussed.