Nonlocal Appearance of a Macroscopic Angular Momentum |
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| Authors: | G. S. Paraoanu R. Healey |
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| Affiliation: | (1) Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria;(2) Low Temperature Laboratory, Aalto University, P.O. Box 15100, 00076 Aalto, Finland;(3) Department of Philosophy, University of Arizona, Tucson, AZ 85721, USA |
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| Abstract: | We discuss a type of measurement in which a macroscopically large angular momentum (spin) is “created” nonlocally by the measurement of just a few atoms from a double Fock state. This procedure apparently leads to a blatant nonconservation of a macroscopic variable—the local angular momentum. We argue that while this gedankenexperiment provides a striking illustration of several counter-intuitive features of quantum mechanics, it does not imply a non-local violation of the conservation of angular momentum. |
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