论文标题
由空腔真空场控制的量子电子传输
Quantum electron transport controlled by cavity vacuum fields
论文作者
论文摘要
我们从理论上探讨了与腔吸真空场的耦合如何由于光 - 摩擦相互作用的反旋转波术语而影响量子导体中的电子传输。我们根据有效电子哈密顿量预测的传输系数确定量子电导。裸电子状态之间的耦合是由涉及中间状态的虚拟过程介导的，其中一个电子（或一个孔）在费米海的顶部和一个虚拟腔光子上。我们研究了在人造或无序的单粒子电位的存在以及空间变化的腔体模式下的量子电导的行为。作为说明性示例，我们将理论应用于一维导体和无序的2D量子霍尔系统。我们展示了腔度真空场如何导致弹道态中电子电导的大大增强或抑制，以及对电导量化和波动的修改。
We explore theoretically how the coupling to cavity vacuum fields affects the electron transport in quantum conductors due to the counter-rotating-wave terms of light-matter interaction. We determine the quantum conductance in terms of the transmission coefficients predicted by an effective electron Hamiltonian. The coupling between bare electronic states is mediated by virtual processes involving intermediate states with one electron (or one hole) on top of the Fermi sea and one virtual cavity photon. We study the behavior of the quantum conductance in the presence of artificial or disordered single-particle potentials, as well as a spatially varying cavity mode. As illustrative examples, we apply our theory to 1D conductors and to disordered 2D quantum Hall systems. We show how the cavity vacuum fields can lead to both large enhancement or suppression of electron conductance in the ballistic regime, as well as modification of the conductance quantization and fluctuations.
