用薛定谔猫使量子位失相
Dephasing of qubits by the Schrödinger cat
摘要：
我们研究了耦合到玻色子浴的单个量子比特的退相。特别是，我们调查的情况下，当浴最初准备在一个纯粹的状态称为薛定谔猫。在明确的对比，初始相干态的时间演化，纯度和相干因子的时间演化现在取决于特定的选择薛定谔猫状态。我们还证明了两量子比特系统的纠缠演化也以类似的方式依赖于初始条件。
英文摘要：
We study the dephasing of a single qubit coupled to a bosonic bath. In particular, we investigate the case when the bath is initially prepared in a pure state known as the Schrödinger cat. In clear contradistinction to the time-evolution of an initial coherent state, the time evolutions of the purity and the coherence factor now depend on the particular choice of the Schrödinger cat state. We also demonstrate that the evolution of the entanglement of a two--qubit system depends on the initial conditions in a similar way.
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