# Practical and Reliable Error Bars in Quantum Tomography.

@article{Faist2016PracticalAR, title={Practical and Reliable Error Bars in Quantum Tomography.}, author={P. Faist and R. Renner}, journal={Physical review letters}, year={2016}, volume={117 1}, pages={ 010404 } }

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… CONTINUE READING

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