Feng Ling-Juan, Ni Jia, Gong Shang-Qing
Opt Express. 2024 Feb 12;32(4):5117-5130. doi: 10.1364/OE.507086.
Photon blockade (PB) is an important quantum phenomenon in cavity quantum electrodynamics (QED). Here, we investigate the PB effect in the simplest cavity QED systems (one cavity containing first a single atom and then two atoms), where only the atoms are weakly driven. Via the analytical calculation and numerical simulation, we show that the strong PB can be generated even with the weak-coupling regime at the total resonance. This blockade is ascribed to the two-photon absorption, which is fundamentally different from the conventional and unconventional blockade mechanisms. Therefore, our study provides an alternative approach to produce the PB in the atom-driven cavity QED system.
光子阻塞（PB）是腔量子电动力学（QED）中的一种重要量子现象。在此，我们研究最简单的腔QED系统（一个腔中先包含单个原子，然后包含两个原子）中的PB效应，其中仅原子受到弱驱动。通过解析计算和数值模拟，我们表明即使在总共振的弱耦合 regime下也能产生强PB。这种阻塞归因于双光子吸收，这与传统和非传统的阻塞机制有根本区别。因此，我们的研究为在原子驱动的腔QED系统中产生PB提供了一种替代方法。
