Physics – Quantum Physics
Scientific paper
1998-10-06
Fortsch.Phys.46:741,1998
Physics
Quantum Physics
Latex 9 pages, 1 figure. Fundamental Problems in Quantum Theory, University of Maryland Baltimore, 1997
Scientific paper
John Wheeler devised a gedanken experiment in which a piece of apparatus can be altered just before the arrival of particle, and this ``delayed choice'' can, seemingly, alter the quantum state of the particle at a much earlier time, long before the choice is made. A slightly different gedanken experiment, which exhibits the same conceptual difficulty, is analyzed using the techniques of consistent history quantum theory. The idea that the future influences the past disappears when proper account is taken of the diversity of possible quantum descriptions of the world, and their mutual compatibility or incompatibility.
Griffiths Robert B.
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