论文标题
由不完美腔控制的单光子散射
Single-photon scattering controlled by an imperfect cavity
论文作者
论文摘要
我们研究了由不完美腔控制的耦合谐振器波导（CRW）中的单光子传输。引入了Lorentzian频谱来描述耗散。我们发现，尽管不完美的腔是遗传系统，但概率电流的保护可能会被损坏。不完美的腔与CRW之间的耦合强度在谐振频率附近具有显着影响。随着耦合强度的增加，传输系数变小。光谱宽度在非谐振条件下起主要作用，在频谱宽度的增加中，透射系数极大地抑制了。当跳跃幅度足够大时，我们还观察到传输和反射系数的突然跳跃。所有独特的行为都与不完善的腔所引起的复杂有效电位密切相关。
We study the single-photon transport in the coupled-resonator waveguide (CRW) controlled by an imperfect cavity. A Lorentzian spectrum is introduced to describe the dissipation. We find that the probability current conservation can be broken, although the imperfect cavity is a Hermitian system. The coupling strength between the imperfect cavity and the CRW has significant influences near the resonant frequency. With the increase of the coupling strength, the transmission coefficient becomes smaller. The spectral width plays a dominant role under the off-resonant condition, where the transmission coefficient is greatly suppressed with the increase of the spectral width. We also observe an abrupt jump of the transmission and reflection coefficients when the hopping amplitude is large enough. All the distinctive behaviors are closely related to the complex effective potential induced by the imperfect cavity.
