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Phys. Rev. Lett. 66, 256–259 (1991)

New test of quantum mechanics: Is Planck’s constant unique?

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Ephraim Fischbach
Department of Physics, Purdue University, West Lafayette, Indiana 47907

Geoffrey L. Greene
National Institute of Standards and Technology, Gaithersburg, Maryland 20899

Richard J. Hughes
Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

Received 20 August 1990; published in the issue dated 21 January 1991

We discuss the possibility that different realms of physics are described by distinct quantization constants. From the consistency of existing data, we infer limits on the differences between hypothetically distinct quantization constants for different elementary particles. Since the existence of multiple Planck constants implies violations of space-time symmetries, these limits may be viewed as precise tests of fundamental conservation laws, including the conservation of linear momentum and energy.

© 1991 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.66.256
DOI:
10.1103/PhysRevLett.66.256
PACS:
03.65.Bz