Achieving the Landau bound to precision of quantum thermometry in systems with vanishing gap
Articolo
Data di Pubblicazione:
2016
Citazione:
Achieving the Landau bound to precision of quantum thermometry in systems with vanishing gap / M.G.A. Paris. - In: JOURNAL OF PHYSICS. A, MATHEMATICAL AND THEORETICAL. - ISSN 1751-8113. - 49:3(2016 Jan 22). [10.1088/1751-8113/49/3/03LT02]
Abstract:
We address estimation of temperature for finite quantum systems at thermal equilibrium and show that the Landau bound to precision δT2 ∝ T2, originally derived for a classical not too small system being a portion of a large isolated system at thermal equilibrium, may be also achieved by energy measurement in microscopic quantum systems exhibiting vanishing gap as a function of some control parameter. On the contrary, for any quantum system with a nonvanishing gap Δ, precision of any temperature estimator diverges as δT2 ≳ T4eΔ/T.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Landau bound; quantum estimation; quantum thermometry; statistical and nonlinear physics; statistics and probability; modeling and simulation; mathematical physics; physics and astronomy (all)
Elenco autori:
M.G.A. Paris
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