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Phys. Rev. Lett. 80, 2023–2026 (1998)

Quantum Measurement Backreaction and Induced Topological Phases

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Y. Aharonov1,2, T. Kaufherr1,*, S. Popescu3a,3b,†, and B. Reznik4,‡
1School of Physics and Astronomy, Tel-Aviv University, Tel Aviv 69978, Israel
2Department of Physics, University of South Carolina, Columbia, South Carolina 29208
3aIsaac Newton Institute, Cambridge University, 20 Clarkson Road, Cambridge, CB3 OEH, United Kingdom
3band BRIMS, Hewlett-Packard Laboratories, Bristol BS12 6QZ, United Kingdom
4Theoretical Division, T-6, MS B288, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

Received 25 August 1997; published in the issue dated 9 March 1998

It is shown that a topological vector potential (Berry phase) is induced by the act of measuring angular momentum in a direction defined by a reference particle. This vector potential appears as a consequence of the backreaction due to the quantum measurement.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.2023
DOI:
10.1103/PhysRevLett.80.2023
PACS:
03.65.Bz

*Electronic address: trka@ccsg.tau.ac.il

Electronic address: sp230@newton.cam.ac.uk

Electronic address: reznik@t6-serv.lanl.gov