Optimal quantum circuits for general phase estimation

Details Optimal quantum circuits for general phase estimation Optimal quantum circuits for general phase estimation

2006-09-20

arxiv.org/abs/quant-ph/0609160v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

We address the problem of estimating the phase phi given N copies of the phase rotation gate u(phi). We consider, for the first time, the optimization of the general case where the circuit consists of an arbitrary input state, followed by any arrangement of the N phase rotations interspersed with arbitrary quantum operations, and ending with a POVM. Using the polynomial method, we show that, in all cases where the measure of quality of the estimate phi' for phi depends only on the difference phi'-phi, the optimal scheme has a very simple fixed form. This implies that an optimal general phase estimation procedure can be found by just optimizing the amplitudes of the initial state.

Affiliated with

Also associated with

No associations

Rating

Optimal quantum circuits for general phase estimation 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 Optimal quantum circuits for general phase estimation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optimal quantum circuits for general phase estimation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-135300