Achieving sub-shot-noise sensing at finite temperatures

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Achieving sub-shot-noise sensing at finite temperatures

We investigate sensing of magnetic fields using quantum spin chains at finite temperature and exploit quantum phase crossovers to improve metrological bounds on the estimation of the chain parameters. In particular, we analyze the XX spin chain and show that the magnetic sensitivity of this system i...

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Bibliographic Details
Main Authors:	Mehboudi, Mohammad, Correa, Luis A., Sanpera, Anna
Format:	Article
Published:	American Physical Society 2016
Online Access:	https://eprints.nottingham.ac.uk/46867/

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