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We provide a protocol for Hamiltonian parameter estimation which relies only on the Zeeman eﬀect. No time-dependent quantities need to be measured, it fully suﬃces to observe spectral shifts induced by ﬁelds applied to local ‘markers’. We demonstrate the idea with a simple tight-binding Hamiltonian and numerically show stability with respect to Gaussian noise on the spectral measurements. Then we generalize the result to show applicability to a wide range of systems, including quantum spin chains, networks of qubits, and coupled harmonic oscillators, and suggest potential experimental implementations.
|Journal||Physical Review Letters|
|Publication status||Published - 21 Jul 2017|
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- Faculty of Business and Physcial Sciences, Department of Mathematics - Honorary Appointment
- 1 Finished
Control characterisation of noisy quantum devices
Engineering and Physical Sciences Research Council
01 Jun 2015 → 30 Sept 2016
Project: Externally funded research