Optimal control for Hamiltonian parameter estimation in non-commuting and bipartite quantum dynamics
Qin S, Cramer M, Koch C, Serafini A (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 13
Article Number: 121
Journal Issue: 6
DOI: 10.21468/SciPostPhys.13.6.121
Abstract
The ability to characterise a Hamiltonian with high precision is crucial for the implementation of quantum technologies. In addition to the well-developed approaches utilising optimal probe states and optimal measurements, the method of optimal control can be used to identify time-dependent pulses applied to the system to achieve higher precision in the estimation of Hamiltonian parameters, especially in the presence of noise. Here, we extend optimally controlled estimation schemes for single qubits to non-commuting dynamics as well as two interacting qubits, demonstrating improvements in terms of maximal precision, time-stability, as well as robustness over uncontrolled protocols.
Involved external institutions
Freie Universität Berlin
Germany (DE)
University College London (UCL)
United Kingdom (GB)
Q-CTRL
Australia (AU)
Germany (DE)
University College London (UCL)
United Kingdom (GB)
Q-CTRL
Australia (AU)
How to cite
APA:
Qin, S., Cramer, M., Koch, C., & Serafini, A. (2022). Optimal control for Hamiltonian parameter estimation in non-commuting and bipartite quantum dynamics. SciPost Physics, 13(6). https://doi.org/10.21468/SciPostPhys.13.6.121
MLA:
Qin, Shushen, et al. "Optimal control for Hamiltonian parameter estimation in non-commuting and bipartite quantum dynamics." SciPost Physics 13.6 (2022).
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