Speaker
Dr
Daniel Rohrlich
(Ben-Gurion University of the Negev)
Description
We present a paradox involving a particle and a mirror. They exchange a nonlocal quantity - weak modular angular momentum, $\langle L_z ~\rm{mod}~2\hbar\rangle_w$ - but no local interaction between them seems to allow such an exchange. We demonstrate that the particle and mirror $do$ interact locally via a $local$ $current$ of $\langle L_z ~\rm{mod}~2\hbar\rangle_w$. In this sense, we transform the "interaction-free measurement" of Elitzur and Vaidman, in which two local quantities (the positions of a photon and a bomb in the two arms of a Mach-Zehnder interferometer) interact nonlocally, into a thought experiment in which two nonlocal quantities (the modular angular momentum of the particle and of the mirror) interact locally.
| Topic: | Mini-workshop: Quantum Foundations and Quantum Information |
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Authors
Prof.
Yakir Aharonov
(Tel Aviv University and Chapman University)
Mr
Tomer Landsberger
(Tel Aviv University)
Dr
Daniel Rohrlich
(Ben-Gurion University of the Negev)
