Measurements, errors, and negative kinetic energy

Yakir Aharonov, Sandu Popescu, Daniel Rohrlich, and Lev Vaidman
Phys. Rev. A 48, 4084 – Published 1 December 1993
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Abstract

An analaysis of errors in measurement yields insight into the penetration of quantum particles into classically forbidden regions. In addition to physical values, realistic measurements yield ‘‘unphysical’’ values which, we show, can form a consistent pattern. An experiment to isolate a particle in a classically forbidden region obtains negative values for its kinetic energy. These values realize the concept of a weak value, discussed in previous works.

  • Received 5 May 1993

DOI:https://doi.org/10.1103/PhysRevA.48.4084

©1993 American Physical Society

Authors & Affiliations

Yakir Aharonov

  • School of Physics and Astronomy, Tel-Aviv University, Ramat-Aviv, Tel-Aviv 69978 Israel
  • Department of Physics, University of South Carolina, Columbia, South Carolina 29208

Sandu Popescu

  • Université Libre de Bruxelles, Campus Plaine, Code Postal 225, Boulevard du Triomphe, B-1050 Bruxelles, Belgium

Daniel Rohrlich and Lev Vaidman

  • School of Physics and Astronomy, Tel-Aviv University, Ramat-Aviv, Tel-Aviv 69978 Israel

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Vol. 48, Iss. 6 — December 1993

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