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Phys. Rev. Lett. 83, 3978–3981 (1999)

Search for Exchange-Antisymmetric Two-Photon States

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D. DeMille1, D. Budker2a,2b, N. Derr3,*, and E. Deveney3,†
1Department of Physics, Yale University, New Haven, Connecticut 06520
2aDepartment of Physics, University of California, Berkeley, California 94720-7300
2band Lawrence Berkeley National Laboratory, Berkeley, California 94720
3Department of Physics, Amherst College, Amherst, Massachusetts 01002

Received 12 May 1999; published in the issue dated 15 November 1999

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<1.2×10-7.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.3978
DOI:
10.1103/PhysRevLett.83.3978
PACS:
03.65.Bz, 05.30.Jp, 32.80.-t, 42.50.Ar

*Present address: MIT, Lincoln Laboratory, 244 Wood St., Lexington, MA 02420.

†Present address: Physics Department, Bridgewater State College, Bridgewater, MA 02325.

 
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