Estimating temperature via sequential measurements

Antonella De Pasquale, Kazuya Yuasa, Vittorio Giovannetti

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    We study the efficiency of estimation procedures in which the temperature of an external bath is indirectly recovered by monitoring the transformations induced on a probing system that is put in thermal contact with the bath. In particular we compare the performances of sequential measurement schemes - where the probe is initialized only once and measured repeatedly during its interaction with the bath - with those of measure and re-prepare approaches where instead, after each interaction and measurement stage, the probe is reinitialized into the same fiduciary state. From our analysis it is revealed that the sequential approach, while being in general not capable of providing the best accuracy achievable, is nonetheless more versatile with respect to the choice of the initial state of the probe, yielding on average smaller indetermination levels.

    Original languageEnglish
    Article number012316
    JournalPhysical Review A
    Volume96
    Issue number1
    DOIs
    Publication statusPublished - 2017 Jul 11

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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