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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >A fermionic bath induced antibunching and coherence in Mollow spectra
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A fermionic bath induced antibunching and coherence in Mollow spectra

机译：铁离子浴在莫洛光谱中诱导反聚束和相干

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In this work, we have derived the modified Bloch equation from the generalized master equation due to the fermionic bath where one needs to consider Grassmann algebra to obtain the similar mathematical structure of the reduced system dynamics, as in the case of a bosonic bath. There is an enhancement of antibunching in the photon emission with an increase in effective temperature. This is in principle a manifestation of the antisymmetric two-particle dynamic anticorrelation in the fermionic bath with a defined chemical potential characterized by the forbidden overlapping. This is evident from the modified fluctuation–dissipation relation. We have compared it thoroughly with an experimental result in the temperature dependent emission characteristics within an environment of quantum dots in a Hanburry-Brown–Twiss set-up. For the fermionic bath, an effective temperature assisted coherence phenomenon is induced in the system dynamics, which is reflected in the resonance fluorescence spectrum with the variation of chemical potential. In the Mollow’s absorption spectra, when the Rabi frequency is sufficiently low, the side peaks appear as chemical potential induced coherence phenomenon rather than the traditional field induced one. The subsequent gain in the probe wave is evidently of thermal origin, where the energy is fully supplied by the fermionic bath at non-zero temperatures. This is not possible for a bosonic bath—an example of the extraction of coherence from the fermionic bath.
机译：在这项工作中，由于费米离子浴，我们需要从广义主方程派生出经过修改的Bloch方程，其中需要考虑Grassmann代数来获得降低的系统动力学的类似数学结构，例如在玻色浴中。随着有效温度的增加，光子发射中的反聚束增强。原则上，这是铁离子浴中具有对称化学势的反对称两粒子动态反相关的表现，化学势的特征是禁止重叠。从修改后的涨落－耗散关系可以明显看出这一点。我们已经将其与Hanburry-Brown-Twiss装置中量子点环境中与温度相关的发射特性的实验结果进行了彻底的比较。对于铁离子浴，在系统动力学中诱发了有效的温度辅助相干现象，该现象在化学势变化的共振荧光光谱中反映出来。在Mollow的吸收光谱中，当Rabi频率足够低时，侧峰以化学势诱发的相干现象出现，而不是传统的场致现象。探测波中的后续增益显然是热源，在非零温度下，能量由铁离子浴完全提供。玻色浴不可能做到这一点-这是从铁离子浴中提取相干性的一个例子。

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