Kraus representation of a damped harmonic oscillator and its application
Kraus representation of a damped harmonic oscillator and its application
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DOI：
10.1103/physreva.70.042308
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发表时间：
2004-07
影响因子：
2.9
通讯作者：
Yu-xi Liu;S. Ozdemir;A. Miranowicz;N. Imoto
中科院分区：
文献类型：
--
作者：
Yu-xi Liu;S. Ozdemir;A. Miranowicz;N. Imoto
根据定义，受到环境影响的谐振子的克劳斯表示（建模为振幅阻尼或相位阻尼）由简单的算子代数解直接给出。作为示例和应用，我们首先给出单个量子位的克劳斯表示，其计算基础状态被定义为玻色真空和单粒子数状态。我们进一步讨论了环境对量子位的影响，其计算基础状态被定义为玻色子奇数相干态和偶数相干态。环境对两种不同计算基础定义的纠缠量子位的影响与保真度的使用进行了比较。
By definition, the Kraus representation of a harmonic oscillator suffering from the environment effect, modeled as the amplitude damping or the phase damping, is directly given by a simple operator algebra solution. As examples and applications, we first give a Kraus representation of a single qubit whose computational basis states are defined as bosonic vacuum and single particle number states. We further discuss the environment effect on qubits whose computational basis states are defined as the bosonic odd and even coherent states. The environment effects on entangled qubits defined by two different kinds of computational basis are compared with the use of fidelity.