Direct estimations of linear and non-linear functionals of a quantum state

Details Direct estimations of linear and non-linear functionals of a quantum state Direct estimations of linear and non-linear functionals of a quantum state

2002-03-04

arxiv.org/abs/quant-ph/0203016v1

Phys. Rev. Lett. 88, 217901 (2002)

Physics

Quantum Physics

This paper supersedes the paper quant-ph/0112073, titled "Universal Quantum Estimator". We emphasise the estimation of linear

Scientific paper

10.1103/PhysRevLett.88.217901

We present a simple quantum network, based on the controlled-SWAP gate, that can extract certain properties of quantum states without recourse to quantum tomography. It can be used used as a basic building block for direct quantum estimations of both linear and non-linear functionals of any density operator. The network has many potential applications ranging from purity tests and eigenvalue estimations to direct characterization of some properties of quantum channels. Experimental realizations of the proposed network are within the reach of quantum technology that is currently being developed.

Affiliated with

Also associated with

No associations

Rating

Direct estimations of linear and non-linear functionals of a quantum state 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 Direct estimations of linear and non-linear functionals of a quantum state, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct estimations of linear and non-linear functionals of a quantum state will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-76060