Measurement driven quantum evolution

Details Measurement driven quantum evolution Measurement driven quantum evolution

2005-09-23

arxiv.org/abs/quant-ph/0509173v1

Physics

Quantum Physics

7 pages, 1 figure

Scientific paper

10.1103/PhysRevA.73.012322

We study the problem of mapping an unknown mixed quantum state onto a known pure state without the use of unitary transformations. This is achieved with the help of sequential measurements of two non-commuting observables only. We show that the overall success probability is maximized in the case of measuring two observables whose eigenstates define mutually unbiased bases. We find that for this optimal case the success probability quickly converges to unity as the number of measurement processes increases and that it is almost independent of the initial state. In particular, we show that to guarantee a success probability close to one the number of consecutive measurements must be larger than the dimension of the Hilbert space. We connect these results to quantum copying, quantum deleting and entanglement generation.

Affiliated with

Also associated with

No associations

Rating

Measurement driven quantum evolution 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 Measurement driven quantum evolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement driven quantum evolution will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-71701