Negative Kinetic Energy Between Past and Future State Vectors

Details Negative Kinetic Energy Between Past and Future State Vectors Negative Kinetic Energy Between Past and Future State Vectors

1994-06-29

arxiv.org/abs/cond-mat/9406116v1

Physics

Condensed Matter

Talk presented at the Conference on Fundamental Problems in Quantum Theory, Baltimore, MD, June 1994, 10 pp, plain TeX

Scientific paper

10.1111/j.1749-6632.1995.tb38982

An analysis of errors in measurement yields new insight into classically forbidden quantum processes. In addition to "physical" values, a realistic measurement can yield "unphysical" values; we show that in {\it sequences} of measurements, the "unphysical" values can form a consistent pattern. An experiment to isolate a particle in a classically forbidden region obtains a negative value for its kinetic energy. It is the {\it weak value} of kinetic energy between past and future state vectors.

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