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- W4296593640 abstract "Quantum sensors outperform their classical counterparts in their estimation precision, given the same amount of resources. So far, quantum-enhanced sensitivity has been achieved by exploiting the superposition principle. This enhancement has been obtained for particular forms of entangled states, adaptive measurement basis change, critical many-body systems, and steady state of periodically driven systems. Here, we introduce a different approach to obtain quantum-enhanced sensitivity in a many-body probe through utilizing the nature of quantum measurement and its subsequent wave function collapse without demanding prior entanglement. Our protocol consists of a sequence of local measurements, without reinitialization, performed regularly during the evolution of a many-body probe. As the number of sequences increases, the sensing precision is enhanced beyond the standard limit, reaching the Heisenberg bound asymptotically. The benefits of the protocol are multifold as it uses a product initial state and avoids complex initialization (e.g., prior entangled states or critical ground states) and allows for remote quantum sensing." @default.
- W4296593640 created "2022-09-22" @default.
- W4296593640 creator A5020091882 @default.
- W4296593640 creator A5039235834 @default.
- W4296593640 creator A5044565348 @default.
- W4296593640 creator A5073273114 @default.
- W4296593640 date "2022-09-13" @default.
- W4296593640 modified "2023-10-18" @default.
- W4296593640 title "Sequential Measurements for Quantum-Enhanced Magnetometry in Spin Chain Probes" @default.
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- W4296593640 doi "https://doi.org/10.1103/physrevlett.129.120503" @default.
- W4296593640 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36179207" @default.