Optimal control for Hamiltonian parameter estimation in non-commuting and bipartite quantum dynamics
Shushen Qin, Marcus Cramer, Christiane P. Koch, Alessio Serafini
SciPost Phys. 13, 121 (2022) · published 8 December 2022
- doi: 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.
Cited by 4
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 2 Shushen Qin,
- 3 Marcus Cramer,
- 4 Christiane Koch,
- 1 Alessio Serafini
- 1 University College London [UCL]
- 2 Centre for Quantum Technologies [CQT]
- 3 Q-CTRL
- 4 Freie Universität Berlin / Freie Universität Berlin [FU Berlin]