Qin, Shushen;
Cramer, Marcus;
Koch, Christiane P;
Serafini, Alessio;
(2022)
Optimal control for Hamiltonian parameter estimation in non-commuting and bipartite quantum dynamics.
SciPost Physics
, 13
(6)
, Article 121. 10.21468/SciPostPhys.13.6.121.
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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.
| Type: | Article |
|---|---|
| Title: | Optimal control for Hamiltonian parameter estimation in non-commuting and bipartite quantum dynamics |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.21468/SciPostPhys.13.6.121 |
| Publisher version: | https://doi.org/10.21468/SciPostPhys.13.6.121 |
| Language: | English |
| Additional information: | Copyright S. Qin et al. This work is licensed under the Creative Commons Attribution 4.0 International License. Published by the SciPost Foundation. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, METROLOGY |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10165637 |
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