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Quantum Optics$
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John Garrison and Raymond Chiao

Print publication date: 2008

Print ISBN-13: 9780198508861

Published to Oxford Scholarship Online: September 2008

DOI: 10.1093/acprof:oso/9780198508861.001.0001

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Cavity quantum electrodynamics

Cavity quantum electrodynamics

Chapter:
(p.381) 12 Cavity quantum electrodynamics
Source:
Quantum Optics
Author(s):

J. C. Garrison

R. Y. Chiao

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198508861.003.0013

This chapter shows that the radiative behavior of a two-level atom in free space is drastically modified when the atom is confined to a cavity with dimensions comparable to the emitted wavelength. In the latter situation the photon cannot escape to infinity, but is instead reflected from the cavity walls to re-excite the atom. In the resonant wave approximation, the evolution of the atom-photon system in a cavity is described by the Jaynes-Cummings model. For an atom initially in the excited state, the excited-state occupation probability first collapses to an apparent steady-state value of 1/2, but later experiences a revival with oscillations around 1/2. This system has been experimentally realized by a device called a micromaser.

Keywords:   Jaynes-Cummings model, collapse, revival, micromaser

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