Physics – Quantum Physics
Scientific paper
2009-07-03
Phys. Rev. A 81, 012103 (2010)
Physics
Quantum Physics
Extended version (5 pages), including double slit interference as an example and the resolution of Schroedinger`s cat paradox
Scientific paper
10.1103/PhysRevA.81.012103
The reconstruction of quantum states from a sufficient set of experimental data can be achieved with arbitrarily weak measurement interactions. Since such weak measurements have negligible back-action, the quantum state reconstruction is also valid for the post-selected sub-ensembles usually considered in weak measurement paradoxes. It is shown that post-selection can then be identified with a statistical decomposition of the initial density matrix into transient density matrices conditioned by the anticipated measurement outcomes. This result indicates that it is possible to ascribe the properties determined by the final measurement outcome to each individual quantum system before the measurement has taken place. The ``collapse'' of the pure state wavefunction in a measurement can then be understood in terms of the classical ``collapse'' of a probability distribution as new information becomes available.
No associations
LandOfFree
Complete characterization of post-selected quantum statistics using weak measurement tomography does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Complete characterization of post-selected quantum statistics using weak measurement tomography, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Complete characterization of post-selected quantum statistics using weak measurement tomography will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-705577