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- W4296457140 abstract "In this work, we study temperature sensing with finite-sized strongly correlated systems exhibiting quantum phase transitions. We use the quantum Fisher information (QFI) approach to quantify the sensitivity in the temperature estimation, and apply a finite-size scaling framework to link this sensitivity to critical exponents of the system around critical points. We numerically calculate the QFI around the critical points for two experimentally-realizable systems: the spin-1 Bose-Einstein condensate and the spin-chain Heisenberg XX model in the presence of an external magnetic field. Our results confirm finite-size scaling properties of the QFI. Furthermore, we discuss experimentally-accessible observables that (nearly) saturate the QFI at the critical points for these two systems." @default.
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- W4296457140 date "2022-09-19" @default.
- W4296457140 modified "2023-10-09" @default.
- W4296457140 title "Critical quantum thermometry and its feasibility in spin systems" @default.
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- W4296457140 doi "https://doi.org/10.22331/q-2022-09-19-808" @default.
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