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 back-reaction due to the quantum measurement.
Cite
@article{arxiv.quant-ph/9708043,
title = {Quantum Measurement Back-Reaction and Induced Toplogical Phases},
author = {Y. Aharonov and T. Kaufherr and S. Popescu and B. Reznik},
journal= {arXiv preprint arXiv:quant-ph/9708043},
year = {2009}
}
Comments
7 pages, Latex. Revised article. A detailed description of the regime of validity has been added. To appear in Phys. Rev. Lett