On macroscopic quantum coherence: 'Brightened' emissions from collective atoms and molecules

Collective behaviors of quantum particles are one of the most intriguing phenomena in quantum optics. When quantum particles behave collectively as a whole due to the buildup of macroscopic quantum coherence, they emit a burst of light referred to as superradiance. In this talk, I will begin with Dicke superradiance and introduce new cascade superradiance model. Selected experimental studies exploring superradiance in rubidium, cesium and sodium atomic vapors will be discussed. Finally, I will explain a deferred buildup of macroscopic quantum coherence for molecular vibrational states.