Conditional quantum thermometry—enhancing precision by measuring less
Akira Sone,
Diogo O Soares-Pinto,
Sebastian Deffner
Abstract:Taking accurate measurements of the temperature of quantum systems is a challenging task. The mathematical peculiarities of quantum information make it virtually impossible to measure with infinite precision. In the present paper, we introduce a generalize thermal state, which is conditioned on the pointer states of the available measurement apparatus. We show that this conditional thermal state outperforms the Gibbs state in quantum thermometry. The origin for the enhanced precision can be sought in its asymm… Show more
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