Evolution-free Hamiltonian parameter estimation through Zeeman markers

Daniel Burgarth, Ashok Ajoy

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20 Citations (SciVal)
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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.
Original languageEnglish
Article number030402
JournalPhysical Review Letters
Issue number3
Publication statusPublished - 21 Jul 2017


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