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Search for exchange-antisymmetric two-photon states

Physical Review Letters, ISSN: 1079-7114, Vol: 83, Issue: 20, Page: 3978-3981
1999
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Atomic two-photon J = 0 ↔ J′ = 1 transitions are forbidden for photons of the same energy. This selection rule is related to the fact that photons obey Bose-Einstein statistics. We have searched for small violations of this selection rule by studying transitions in atomic Ba. We set a limit on the probability v that photons are in exchange-antisymmetric states: v < 1.2 × 10. © 1999 The American Physical Society.

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