Process reconstruction from incomplete and/or inconsistent data

Details Process reconstruction from incomplete and/or inconsistent data Process reconstruction from incomplete and/or inconsistent data

2004-12-16

arxiv.org/abs/quant-ph/0412129v1

The European Physical Journal D 32, Vol.10,215 - 222 (2005)

Physics

Quantum Physics

9pages, 5 figures

Scientific paper

10.1140/epjd/e2005-00020-2

We analyze how an action of a qubit channel (map) can be estimated from the measured data that are incomplete or even inconsistent. That is, we consider situations when measurement statistics is insufficient to determine consistent probability distributions. As a consequence either the estimation (reconstruction) of the channel completely fails or it results in an unphysical channel (i.e., the corresponding map is not completely positive). We present a regularization procedure that allows us to derive physically reasonable estimates (approximations) of quantum channels. We illustrate our procedure on specific examples and we show that the procedure can be also used for a derivation of optimal approximations of operations that are forbidden by the laws of quantum mechanics (e.g., the universal NOT gate).

Affiliated with

Also associated with

No associations

Rating

Process reconstruction from incomplete and/or inconsistent data 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 Process reconstruction from incomplete and/or inconsistent data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process reconstruction from incomplete and/or inconsistent data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-629022