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Population Inversion and Superluminality

  • Raymond Y. Chiao

Abstract

For this Festschrift in honor of Professor Charles Hard Townes on the occasion of his 80th birthday, it seems appropriate to begin by thinking once again about ammonia, one of his favorite objects of study. The ammonia molecule, upon the inversion of its populations, was the active constituent of the first maser [1]. It was also the constituent of the first molecular cloud, which was discovered by Professor Townes and his coworkers in interstellar space. Here we shall return to ammonia in a laboratory setting, and discuss the possibility that population inversion in a medium such as ammonia gas can lead to further surprises, such as the recently predicted phenomena of superluminality [2–9] and parelectricity [6–9].

Keywords

Wave Packet Group Velocity Population Inversion Raman Gain Gaussian Wave Packet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag New York, Inc. 1996

Authors and Affiliations

  • Raymond Y. Chiao

There are no affiliations available

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