Measurements, errors, and negative kinetic energy

Details Measurements, errors, and negative kinetic energy Measurements, errors, and negative kinetic energy

1993-05-17

arxiv.org/abs/hep-th/9305075v1

Physics

High Energy Physics

High Energy Physics - Theory

22 pp, TAUP 1850-90

Scientific paper

10.1103/PhysRevA.48.4084

An analysis of errors in measurement yields new 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 {\it weak value}, discussed in previous works.

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