Is a quantum standing wave composed of two traveling waves?

B. W. Shore, P. Meystre, S. Stenholm

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


We compare the scattering of an atom by two different quantized standing-wave configurations. The first one is established in a cavity by a pair of fixed mirrors. The other consists of two independent counterpropagating traveling waves, as could occur in a ring configuration. We show that in the quantum regime (of small photon numbers) atoms are scattered differently by a true standing wave than by a superposition of two counterpropagating waves of equal amplitudes and opposite directions. This behavior is a manifestation of momentum conservation. In the case of traveling waves each wave depletes its momentum independently, whereas the standing wave that is fixed in space acts as a potentially infinite sink or source for momentum.

Original languageEnglish (US)
Pages (from-to)903-910
Number of pages8
JournalJournal of the Optical Society of America B: Optical Physics
Issue number4
StatePublished - Apr 1991

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics


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