Controlling Quantum State Reduction

Details Controlling Quantum State Reduction Controlling Quantum State Reduction

1998-05-12

arxiv.org/abs/quant-ph/9805033v1

Phys.Lett. A282 (2001) 336-342

Physics

Quantum Physics

9 pages, REVTeX

Scientific paper

Every measurement leaves the object in a family of states indexed by the possible outcomes. This family, called the posterior states, is usually a family of the eigenstates of the measured observable, but it can be an arbitrary family of states by controlling the object-apparatus interaction. A potentially realizable object-apparatus interaction measures position in such a way that the posterior states are the translations of an arbitrary wave function. In particular, position can be measured without perturbing the object in a momentum eigenstate.

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