Optical bipolaron’s stability and decoherence confined in the symmetric quantum dot are investigated utilizing the modified Lee, Low, and Pines variational method. The binding energy of optical bipolaron in symmetrical quantum dot systems is obtained by computing the energy of the fundamental state, the energy of the ground state of the single polaron, and the prime state excited energy. The formation of the bipolaron in quantum dot structures is thus obtained. Optical bipolaron stability appears to be quite sensitive to the dimensionality of the quantum dot and the material, where α and η material parameters are considered. By investigating information processing, it is possible to compute Shannon’s entropy to study a qubit’s decoherence when in the superimposed state of the fundamental and the prime state excited. We see that decoherence time grows and shrinks with the dielectric constant and the dispersion coefficient. Thus, there exists a threshold dielectric constant and dispersion coefficient which maximizes decoherence time. This threshold dielectric constant and dispersion coefficient increases with the reduction in electron–phonon coupling. This study gives a guideline for the appropriate materials used in the construction of nanodevice.

利用改进的Lee，Low和Pines变分方法研究了对称对称量子点内光学双极化子的稳定性和退相干性。对称量子点系统中光学双极化子的结合能是通过计算基态的能量，单极化子的基态的能量和原始状态的激发能而获得的。由此获得了在量子点结构中双极化子的形成。光学双极化子稳定性似乎对量子点和材料的尺寸非常敏感，其中考虑了α和η材料参数。通过研究信息处理，可以计算香农的熵，以研究在基态和本素激发态的叠加状态下的量子位退相干。我们看到，退相干时间随着介电常数和色散系数的增长而缩小。因此，存在使退相干时间最大化的阈值介电常数和色散系数。该阈值介电常数和色散系数随着电子-声子耦合的减少而增加。这项研究为纳米器件的构造中使用的适当材料提供了指导。