At low temperatures steady-state macroscopic superpositions can be generated in the field of a micromaser pumped by a stream of two-level atoms injected in a coherent superposition of their upper and lower states. The onset of these superpositions resembles a second-order phase transition, with the control parameter being the ratio of the atomic injection rate to the cavity damping rate.
© 1990 Optical Society of America
Original Manuscript: September 8, 1989
Manuscript Accepted: December 18, 1989
Published: February 15, 1990
John J. Slosser, Pierre Meystre, and Ewan M. Wright, "Generation of macroscopic superpositions in a micromaser," Opt. Lett. 15, 233-235 (1990)