Finding a state in a haystack

Details Finding a state in a haystack Finding a state in a haystack

2001-05-11

arxiv.org/abs/quant-ph/0105046v1

Physical Review A 66, 044302 (2002)

Physics

Quantum Physics

11 pages

Scientific paper

10.1103/PhysRevA.65.044302

We consider the problem to single out a particular state among $2^n$ orthogonal pure states. As it turns out, in general the optimal strategy is not to measure the particles separately, but to consider joint properties of the $n$-particle system. The required number of propositions is $n$. There exist $2^n!$ equivalent operational procedures to do so. We enumerate some configurations for three particles, in particular the Greenberger-Horne-Zeilinger (GHZ)- and W-states, which are specific cases of a unitary transformation For the GHZ-case, an explicit physical meaning of the projection operators is discussed.

Affiliated with

Also associated with

No associations

Rating

Finding a state in a haystack 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 Finding a state in a haystack, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Finding a state in a haystack will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-127822