Physics

Experimental critical quantum metrology with the Heisenberg scaling

R. Liu, Y. Chen, et al.

Explore the cutting-edge advancements in critical quantum metrology! This innovative study introduces an adiabatic scheme based on a perturbed Ising spin model with first-order quantum phase transitions, showcasing how precision can achieve Heisenberg scaling at the critical point. Authored by a talented team from leading institutions, this research highlights ease of implementation and impressive robustness against decay.

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Abstract

Critical quantum metrology, utilizing quantum critical systems for parameter estimation, is gaining traction. This paper proposes an adiabatic scheme on a perturbed Ising spin model with a first-order QPT, experimentally implemented using nuclear magnetic resonance. At the critical point, precision achieves Heisenberg scaling (1/T). The scheme's advantages include ease of implementation, robustness against decay, and tunable energy gap.

Publisher

npj Quantum Information

Published On

Dec 13, 2021

Authors

Ran Liu, Yu Chen, Min Jiang, Xiaodong Yang, Ze Wu, Yuchen Li, Haidong Yuan, Xinhua Peng, Jiangfeng Du

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