Super-Heisenberg scaling in a triple point criticality
Abstract
We investigate quantum-enhanced metrology in a triple point criticality and discover that quantum criticality can not always enhance measuring precision. We have developed suitable adiabatic evolution protocols approaching a final point around the triple point to effectively restrain excitations, which could accelerate the adiabatic evolutions and lead to an exponential super-Heisenberg scaling. This scaling behavior is quite valuable in practical parameter estimating experiments with limited coherence time. The super-Heisenberg scaling will degrade into a sub-Heisenberg scaling if the adiabatic parameter modulations adopted can not reduce excitations and weaken the slowing down effect. Additionally, a feasible experimental scheme is also suggested to achieve the anticipated exponential super-Heisenberg scaling. Our findings strongly indicate that criticality-enhanced metrology can indeed significantly enhance measuring precision to a super-Heisenberg scaling when combining a triple point and beneficial parameter modulations in the adiabatic evolution, which will be conducive to the exploration of other super-Heisenberg scaling and their applications.
Keywords
Cite
@article{arxiv.2409.14048,
title = {Super-Heisenberg scaling in a triple point criticality},
author = {Jia-Ming Cheng and Yong-Chang Zhang and Xiang-Fa Zhou and Zheng-Wei Zhou},
journal= {arXiv preprint arXiv:2409.14048},
year = {2025}
}