Journal
PHYSICAL REVIEW LETTERS
Volume 114, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.080403
Keywords
-
Categories
Funding
- EU (Marie Curie) [CIG 293993/ENFOQI]
- EU (ERC Starting Grant GEDENTQOPT)
- EU (FET Project QWAD)
- EU (ERC QOLAPS)
- BMBF (Chist-Era Project QUASAR)
- Brazilian agency CAPES, through the program Science without Borders
- Elite Network of Bavaria (PhD program QCCC)
- Elite Network of Bavaria (PhD program ExQM)
Ask authors/readers for more resources
Common tools for obtaining physical density matrices in experimental quantum state tomography are shown here to cause systematic errors. For example, using maximum likelihood or least squares optimization to obtain physical estimates for the quantum state, we observe a systematic underestimation of the fidelity and an overestimation of entanglement. Such strongly biased estimates can be avoided using linear evaluation of the data or by linearizing measurement operators yielding reliable and computational simple error bounds.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available