Quantum measurement and the Aharonov–Bohm effect with superposed magnetic fluxes

Quantum measurement and the Aharonov–Bohm effect with superposed magnetic fluxes We consider the magnetic flux in a quantum mechanical superposition of two values and find that the Aharonov–Bohm effect interference pattern contains information about the nature of the superposition, allowing information about the state of the flux to be extracted without disturbance. The information is obtained without transfer of energy or momentum and by accumulated nonlocal interactions of the vector potential $$\varvec{A}$$ A with many charged particles forming the interference pattern, rather than with a single particle. We suggest an experimental test using already experimentally realized superposed currents in a superconducting ring and discuss broader implications. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Quantum measurement and the Aharonov–Bohm effect with superposed magnetic fluxes

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Publisher
Springer US
Copyright
Copyright © 2013 by Springer Science+Business Media New York
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-013-0652-3
Publisher site
See Article on Publisher Site

Abstract

We consider the magnetic flux in a quantum mechanical superposition of two values and find that the Aharonov–Bohm effect interference pattern contains information about the nature of the superposition, allowing information about the state of the flux to be extracted without disturbance. The information is obtained without transfer of energy or momentum and by accumulated nonlocal interactions of the vector potential $$\varvec{A}$$ A with many charged particles forming the interference pattern, rather than with a single particle. We suggest an experimental test using already experimentally realized superposed currents in a superconducting ring and discuss broader implications.

Journal

Quantum Information ProcessingSpringer Journals

Published: Oct 17, 2013

References

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