在量子计量中利用自适应与因果叠加对抗噪声
量子物理
2023-08-31 v2
摘要
我们推导了最一般自适应量子计量场景下可达精度的新界限。证明了这些界限在渐近意义下可饱和，并且在信道使用次数很大时等价于已知的并行方案界限。这完全解决了量子计量领域中关于并行与自适应策略渐近等价性的长期猜想。新界限也便于轻松评估采用非标准因果叠加策略的潜在益处，对于此类策略，我们同样证明了其在渐近上相对于并行策略并无优势，与自适应情形类似。
引用
@article{arxiv.2212.08106,
title = {Using adaptiveness and causal superpositions against noise in quantum metrology},
author = {Stanislaw Kurdzialek and Wojciech Gorecki and Francesco Albarelli and Rafal Demkowicz-Dobrzanski},
journal= {arXiv preprint arXiv:2212.08106},
year = {2023}
}
备注
We added proof that the causal superposition channel from appendix C is well defined. We showed how to obtain a tighter bound for a parallel case (appendix D3)