Achieving the Landau bound to precision of quantum thermometry in systems with vanishing gap

@article{Paris2016AchievingTL,
  title={Achieving the Landau bound to precision of quantum thermometry in systems with vanishing gap},
  author={Matteo G. A. Paris},
  journal={Journal of Physics A},
  year={2016},
  volume={49}
}
  • Matteo G. A. Paris
  • Published 2016
  • Physics
  • Journal of Physics A
  • We address estimation of temperature forfinite quantum systems at thermal equilibrium and show that the Landau bound to precision TT 22 Er , originally derived for a classicalnot too smallsystem being a portion of a large isolated system at thermal equilibrium, may be also achieved by energy measurement in microscopicquantumsystems exhibiting vanishing gap as a function of some control parameter. On the contrary, for any quantum system with a nonvanishing gapΔ, precision of any temperature… CONTINUE READING

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