Connecting Classical and Quantum Mode Theories for Coupled Lossy Cavity Resonators Using Quasinormal Modes

We present a quantized quasinormal mode approach to rigorously describe coupled lossy resonators and quantify the quantum coupling parameters as function of distance between resonators. also make direct connection classical theories, offering new insights into open cavities. detailed calculations for microdisk show striking interference effects that depend on phase modes, an effect is significant high-quality-factor modes. Our results demonstrate commonly adopted master equations such systems are generally not applicable we discuss physics captured using mode-coupling how these relate parameters. Using insights, several models fix failures dissipative Jaynes–Cummings-type Additionally, improve lossless (i.e., normal modes) by employing nondiagonal expansion based knowledge eigenfrequencies analytical theory accurately capture high-quality factors.