Improving cutoff frequency estimation via optimized π-pulse sequence

• Published in: Chinese physics B Vol. 34; no. 1; pp. 10309 - 10314
• Main Authors: Zheng, Wang-Sheng, Zhang, Chen-Xia, Gong, Bei-Li
• Format: Journal Article
• Language: English
• Published: Chinese Physical Society and IOP Publishing Ltd 01.01.2025
• Subjects: environment parameters estimation; optimized; pulse sequence; quantum Fisher information

The cutoff frequency is one of the crucial parameters that characterize the environment. In this paper, we estimate the cutoff frequency of the Ohmic spectral density by applying the π -pulse sequences (both equidistant and optimized) to a quantum probe coupled to a bosonic environment. To demonstra...