publication . Research . Preprint . 2015

Practical, Reliable Error Bars in Quantum Tomography

Faist, Philippe; Renner, Renato;
Open Access English
  • Published: 22 Sep 2015
  • Publisher: Cornell University
  • Country: Switzerland
Abstract
Precise characterization of quantum devices is usually achieved with quantum tomography. However, most methods which are currently widely used in experiments, such as maximum likelihood estimation, lack a well-justified error analysis. Promising recent methods based on confidence regions are difficult to apply in practice or yield error bars which are unnecessarily large. Here, we propose a practical yet robust method for obtaining error bars. We do so by introducing a novel representation of the output of the tomography procedure, the "quantum error bars". This representation is (i) concise, being given in terms of few parameters, (ii) intuitive, providing a fa...
Subjects
free text keywords: Quantum Physics
Funded by
EC| GEQIT
Project
GEQIT
Generalized (quantum) information theory
  • Funder: European Commission (EC)
  • Project Code: 258932
  • Funding stream: FP7 | SP2 | ERC
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publication . Research . Preprint . 2015

Practical, Reliable Error Bars in Quantum Tomography

Faist, Philippe; Renner, Renato;