Abstract Decoherence of a two-qubit system is studied when each qubit interacts with a Markovian environment in an indefinite way. It is assumed that which environment of the two interacts with each qubit is determined by a controller qubit. This leads to indefiniteness of the environments. When information conveyed by the controller qubit is discarded, the quantum channel of the two qubits is given by a statistical mixture of the two Markovian channels. When appropriate projective measurement is performed on the controller qubit, it is found that the indefiniteness of the two environments significantly affects the output state of the two qubits. Once a specific measurement outcome is obtained, the output state becomes the Bell singlet state even if an initial state of the two qubit has no quantum correlation. Even when the measurement yields the other outcome, the entanglement, the Bell-inequality violation and the quantum discord can be enhanced.

中文翻译：

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两个具有不确定性的独立环境中的双量子位相关性

摘要 研究了当每个量子位以不确定的方式与马尔可夫环境相互作用时双量子位系统的去相干性。假设两者中的哪个环境与每个量子位交互是由控制器量子位决定的。这导致环境的不确定性。当控制器量子位传递的信息被丢弃时，两个量子位的量子通道由两个马尔可夫通道的统计混合给出。当对控制器量子位进行适当的投影测量时，发现两种环境的不确定性显着影响了两个量子位的输出状态。一旦获得特定的测量结果，即使两个量子位的初始状态没有量子相关性，输出状态也会变成贝尔单线态。