Quantum System Identification by Bayesian Analysis of Noisy Data: Beyond Hamiltonian Tomography

Details Quantum System Identification by Bayesian Analysis of Noisy Data: Beyond Hamiltonian Tomography Quantum System Identification by Bayesian Analysis of Noisy Data: Beyond Hamiltonian Tomography

2009-11-06

arxiv.org/abs/0911.1367v1

Physics

Quantum Physics

6 pages, 3 figures

Scientific paper

10.1134/S1054660X10090434

We consider how to characterize the dynamics of a quantum system from a restricted set of initial states and measurements using Bayesian analysis. Previous work has shown that Hamiltonian systems can be well estimated from analysis of noisy data. Here we show how to generalize this approach to systems with moderate dephasing in the eigenbasis of the Hamiltonian. We illustrate the process for a range of three-level quantum systems. The results suggest that the Bayesian estimation of the frequencies and dephasing rates is generally highly accurate and the main source of errors are errors in the reconstructed Hamiltonian basis.

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