Implementing Non-Projective Measurements via Linear Optics: an Approach Based on Optimal Quantum State Discrimination

Physics – Quantum Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

final published version

Scientific paper

10.1103/PhysRevA.73.062320

We discuss the problem of implementing generalized measurements (POVMs) with linear optics, either based upon a static linear array or including conditional dynamics. In our approach, a given POVM shall be identified as a solution to an optimization problem for a chosen cost function. We formulate a general principle: the implementation is only possible if a linear-optics circuit exists for which the quantum mechanical optimum (minimum) is still attainable after dephasing the corresponding quantum states. The general principle enables us, for instance, to derive a set of necessary conditions for the linear-optics implementation of the POVM that realizes the quantum mechanically optimal unambiguous discrimination of two pure nonorthogonal states. This extends our previous results on projection measurements and the exact discrimination of orthogonal states.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Implementing Non-Projective Measurements via Linear Optics: an Approach Based on Optimal Quantum State Discrimination 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 Implementing Non-Projective Measurements via Linear Optics: an Approach Based on Optimal Quantum State Discrimination, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Implementing Non-Projective Measurements via Linear Optics: an Approach Based on Optimal Quantum State Discrimination will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-475979

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.