Noise-robust quantum sensing via optimal multi-probe spectroscopy

被引：21

作者：

Mueller, Matthias M. ^{[1
,2
,3
,4
]}

Gherardini, Stefano ^{[1
,2
,3
,4
]}

Caruso, Filippo ^{[1
,2
,3
,4
]}

机构：

[1] QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy

[2] CNR, INO, Largo Enrico Fermi 6, I-50125 Florence, Italy

[3] LENS, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy

[4] Univ Firenze, Dipartimento Fis & Astron, Via Giovanni Sansone 1, I-50019 Sesto Fiorentino, Italy

来源：

SCIENTIFIC REPORTS | 2018年 / 8卷

关键词：

Spectral Leakage; Fisher Information; Filter Operation Time; Pulse Transition Function; Dephasing Rate;

D O I：

10.1038/s41598-018-32434-x

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The dynamics of quantum systems are unavoidably influenced by their environment, but in turn observing a quantum system (probe) can allow one to measure its environment: Measurements and controlled manipulation of the probe such as dynamical decoupling sequences as an extension of the Ramsey interference measurement allow to spectrally resolve a noise field coupled to the probe. Here, we introduce fast and robust estimation strategies for the characterization of the spectral properties of classical and quantum dephasing environments. These strategies are based on filter function orthogonalization, optimal control filters maximizing the relevant Fisher Information and multi-qubit entanglement. We investigate and quantify the robustness of the schemes under different types of noise such as finite-precision measurements, dephasing of the probe, spectral leakage and slow temporal fluctuations of the spectrum.

引用

页数：17