The paper derives an exact solution for a two-qubit system coupling to a quantized cavity field driven by two different types of external fields when the cavity is initially in a coherent field state. The two-qubit quantum coherence via the Jensen–Shannon divergence and the two-qubit entanglement via the negativity are investigated under the effects of the physical parameters. The results are depicted that, the generated two-qubit effects depend on the external-qubit and the external-field detunings as well as the initial cavity coherent intensity. It is found that the increase of the parameters of the initial coherent states, the detuning between the cavity field and the external classical field, and the detuning between the qubit and the external classical fields are played a key role in the dynamics of the population inversion and the generated entropic qubit-cavity entanglement. The oscillation amplitudes of the atomic population can be improved when the classical-field detuning is equal to the qubit detuning, and they can be weakened dramatically when the qubit detuning is smaller than the classical-field detuning. The qubit-cavity entanglement can be improved when the classical-field detuning is larger than the qubit detuning, and vice versa.

该论文推导出了当腔最初处于相干场状态时，耦合到由两种不同类型的外部场驱动的量化腔场的双量子位系统的精确解。在物理参数的影响下研究了通过 Jensen-Shannon 散度的双量子位量子相干性和通过负性的双量子位纠缠。结果表明，产生的双量子位效应取决于外量子位和外场失谐以及初始腔相干强度。发现随着初始相干态参数的增加，腔场与外部经典场的失谐，量子位与外部经典场之间的失谐在粒子数反转和产生的熵量子位腔纠缠的动力学中起着关键作用。当经典场失谐等于量子位失谐时，原子群的振荡幅度可以得到改善，而当量子位失谐小于经典场失谐时，它们可以显着减弱。当经典场失谐大于量子位失谐时，可以改善量子位腔纠缠，反之亦然。