Backward evolving quantum states
Abstract
The basic concept of the twostate vector formalism, which is the time symmetric approach to quantum mechanics, is the backward evolving quantum state. However, due to the time asymmetry of the memory's arrow of time, the possible ways to manipulate a backward evolving quantum state differ from those for a standard, forward evolving quantum state. The similarities and the differences between forward and backward evolving quantum states regarding the nocloning theorem, nonlocal measurements and teleportation are discussed. The results are relevant not only in the framework of the twostate vector formalism, but also in the framework of retrodictive quantum theory.
 Publication:

Journal of Physics A Mathematical General
 Pub Date:
 March 2007
 DOI:
 10.1088/17518113/40/12/S23
 arXiv:
 arXiv:quantph/0606208
 Bibcode:
 2007JPhA...40.3275V
 Keywords:

 Quantum Physics
 EPrint:
 Contribution to the J.Phys. A special issue in honor of GianCarlo Ghirardi