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Negative Kinetic Energy between Past and Future State Vectors a
Author(s) -
ROHRLICH DANIEL,
AHARONOV YAKIR,
POPESCU SANDU,
VAIDMAN LEV
Publication year - 1995
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1995.tb38982.x
Subject(s) - tel aviv , library science , physics , computer science
An analysis of errors in measurement yields new insight into classicallyforbidden quantum processes. In addition to "physical" values, a realisticmeasurement can yield "unphysical" values; we show that in {\it sequences} ofmeasurements, the "unphysical" values can form a consistent pattern. Anexperiment to isolate a particle in a classically forbidden region obtains anegative value for its kinetic energy. It is the {\it weak value} of kineticenergy between past and future state vectors.Comment: Talk presented at the Conference on Fundamental Problems in Quantum Theory, Baltimore, MD, June 1994, 10 pp, plain Te