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Phys. Rev. Lett. 62, 2813–2816 (1989)

Degenerate quantum-beat laser: Lasing without inversion and inversion without lasing

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Marlan O. Scully and Shi-Yao Zhu
Center for Advanced Studies and Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131
Max-Planck-Institut für Quantenoptik, D-8046 Garching, Federal Republic of Germany

Athanasios Gavrielides
Air Force Weapons Laboratory, ARBM Kirtland Air Force Base, New Mexico 87117-6009

Received 10 February 1989; published in the issue dated 12 June 1989

A single lasing mode driven by a three-level ‘‘quantum-beat’’ atomic configuration can show gain without population inversion or optical absorption into an excited state without spontaneous or stimulated emission.

© 1989 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.62.2813
DOI:
10.1103/PhysRevLett.62.2813
PACS:
42.50.Md, 42.55.-f