Optimal Quantum Thermometry with Coarse-Grained Measurements

  title={Optimal Quantum Thermometry with Coarse-Grained Measurements},
  author={Karen V. Hovhannisyan and M. R. V. J{\o}rgensen and Gabriel T. Landi and {\'A}lvaro M. Alhambra and Jonatan Bohr Brask and Mart{\'i} Perarnau-Llobet},
  journal={arXiv: Quantum Physics},
Precise thermometry for quantum systems is important to the development of new technology, and understanding the ultimate limits to precision presents a fundamental challenge. It is well known that optimal thermometry requires projective measurements of the total energy of the sample. However, this is infeasible in even moderately-sized systems, where realistic energy measurements will necessarily involve some coarse graining. Here, we explore the precision limits for temperature estimation… 

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