Phys. Rev. Lett. 86, 1919–1922 (2001)Search for Exchange-Antisymmetric States for Spin-0 Particles at the 10-11 LevelReceived 23 August 2000; published in the issue dated 5 March 2001 We set a new upper limit of 1.7×10-11 to the probability that two spin-0 16O nuclei are in forbidden exchange-antisymmetric states, testing the validity of fundamental principles of quantum mechanics. A newly designed difference-frequency spectrometer is used to look for the existence of these states. The experimental test was performed by tuning the spectrometer across a molecular transition of 12C16O2 belonging to the rovibrational band at 4.25 μm, connecting the forbidden states (0000,J = 25) and (0001,J = 26). © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.1919
DOI:
10.1103/PhysRevLett.86.1919
PACS:
05.30.Jp, 21.10.Hw, 33.20.-t, 42.62.Fi
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