Related papers: Topological quantum thermometry

Topological quantum thermometry

URL: http://arxiv.org/abs/2311.14524v1
Date: Fri, 24 Nov 2023 14:49:44 GMT
Title: Topological quantum thermometry
Authors: Anubhav Kumar Srivastava, Utso Bhattacharya, Maciej Lewenstein, and Marcin P{\l}odzie\'n
Abstract summary: An optimal local quantum thermometer saturates the fundamental lower bound for the thermal state temperature estimation accuracy. We show that the optimal local quantum thermometer can be realized in an experimentally feasible system of spinless fermions confined in a one-dimensional optical lattice.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: An optimal local quantum thermometer is a quantum many-body system that saturates the fundamental lower bound for the thermal state temperature estimation accuracy [L. Correa, et. al., Phys. Rev. Lett. 114, 220405 (2015)]. Such a thermometer has a particular energy level structure with a single ground state and highly degenerated excited states manifold, with an energy gap proportional to the estimated temperature. In this work, we show that the optimal local quantum thermometer can be realized in an experimentally feasible system of spinless fermions confined in a one-dimensional optical lattice described by the Rice-Mele model. We characterize the system's sensitivity to temperature changes in terms of quantum Fisher information and the classical Fisher information obtained from experimentally available site occupation measurements.

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