Physics – Quantum Physics
Scientific paper
2012-03-05
Physics
Quantum Physics
10 pages, 8 figures (comments welcomed)
Scientific paper
Reliable and well-characterized quantum resources are indispensable ingredients in quantum information processing. Typically, in a realistic characterization of these resources, imperfect apparatuses result in unavoidable uncertainties and thus give rise to systematic errors. While this is usually accounted for through careful calibration, the effect of such imperfections on the characterization of quantum resources has been largely overlooked in the literature. In this paper, we investigate the effect of systematic errors that arise from imperfect alignment of measurement bases. We show that characterization of quantum resources using quantum state tomography or entanglement witnesses can be undermined with an amount of systematic error that is not uncommon in the laboratories. Curiously, for quantum state tomography, we found that having entanglement can help to reduce the susceptibility to this kind of error. We also briefly discuss how a given entanglement witness can be modified to incorporate the effect of such errors.
Bancal Jean-Daniel
Ferretti-Schöbitz Raphael
Gisin Nicolas
Liang Yeong-Cherng
Rosset Denis
No associations
LandOfFree
Imperfect measurements settings: implications on quantum state tomography and entanglement witnesses 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 Imperfect measurements settings: implications on quantum state tomography and entanglement witnesses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Imperfect measurements settings: implications on quantum state tomography and entanglement witnesses will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-133038