Subradiance with saturated atoms: population enhancement of the long-lived states.
CIPRIS, Ana; MOREIRA, Noel Araujo; ESPIRITO SANTO, Tiago Santiago do; WEISS, Patrizia; VILLAS-BOAS, C. J.; KAISER, Robin; GUERIN, William; BACHELARD, Romain.
CIPRIS, Ana; MOREIRA, Noel Araujo; ESPIRITO SANTO, Tiago Santiago do; WEISS, Patrizia; VILLAS-BOAS, C. J.; KAISER, Robin; GUERIN, William; BACHELARD, Romain.
Abstract: Dipole-dipole interactions are at the origin of long-lived collective atomic states, often called subradiant, which are explored for their potential use in novel photonic devices or in quantum protocols. Here, we study subradiance beyond the single-excitation regime and experimentally demonstrate a 200-fold increase in the population of these modes, as the saturation parameter of the driving field is increased. We attribute this enhancement to a mechanism similar to optical pumping through the well-coupled superradiant states. The lifetimes are unaffected by the pump strength, as the system is ultimately driven toward the single-excitation sector. Our study is a new step in the exploration of the many-body dynamics of large open systems.
@article={003023040,author = {CIPRIS, Ana; MOREIRA, Noel Araujo; ESPIRITO SANTO, Tiago Santiago do; WEISS, Patrizia; VILLAS-BOAS, C. J.; KAISER, Robin; GUERIN, William; BACHELARD, Romain.},title={Subradiance with saturated atoms: population enhancement of the long-lived states},journal={Physical Review Letters},note={v. 126, n. 10, p. 103604-1-103604-6 + supplemental material},year={2021}}