Effect of the Förster interaction and the pulsed pumping on the quantum correlations of a two quantum dot-microcavity system in the strong coupling regime
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引用次数: 0
Abstract
The quantum correlations of a system of two quantum dots with Föster interaction () in a microcavity with strongly coupled dissipation and a single mode of the electromagnetic field and driven by a laser pulse were studied theoretically, using the formalism of the master equation in Lindbland form. The energy eigenvalues of the system were studied as a function of detuning for the first and second excitation varieties. Concurrence (), formation entanglement (), mutual information () and quantum discord () are studied as a function of time considering different values of Föster coupling, varying the pump times of the simulated laser pulse and pulse intensity. We found a discrepancy between and as entanglement quantifiers, noting that concurrence reaches much higher values than ; so concurrence can indicate results that are well above the . The presence of the Föster interaction favors that the quantum discord is the dominant correlation in the system, which indicates that the system maintains quantum correlations even when the entanglement of the system has disappeared, but that it is affected by the increase in the laser pump time.
我们利用林德布兰德形式的主方程公式,从理论上研究了在具有强耦合耗散和电磁场单模的微腔中由两个具有福斯特相互作用(Γ)的量子点组成的系统在激光脉冲驱动下的量子相关性。研究了该系统的能量特征值与第一和第二激发品种的失谐函数的关系。考虑到弗斯特耦合的不同值,改变模拟激光脉冲的泵浦时间和脉冲强度,研究了作为时间函数的一致性(C)、形成纠缠(EoF)、互信息(I)和量子不和谐(Q)。我们发现,作为纠缠量化指标,EoF 和 C 之间存在差异。福斯特相互作用的存在有利于量子不和是系统中的主要相关性,这表明即使系统的纠缠消失,系统仍能保持量子相关性,但会受到激光泵浦时间增加的影响。
期刊介绍:
Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work.
Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas:
-Magnetism
-Materials physics
-Nanostructures and nanomaterials
-Optics and optical materials
-Quantum materials
-Semiconductors
-Strongly correlated systems
-Superconductivity
-Surfaces and interfaces