【报告题目】Quantum-enhanced sensing via sequential measurements
【报告人】Victor Montenegro, Postdoctor, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China
【摘要】In this talk, I will present our latest findings in the quantum sensing field, which permits quantum-enhanced sensitivity via a finite number of sequential measurements . Indeed, the superiority of quantum sensors over classical counterparts is manifested in their enhanced sensitivity and resource efficiency. So far, all the existing protocols for quantum-enhanced sensing rely on quantum superposition. Here, we propose a new remote quantum sensing protocol by exploiting the wave-function collapse of quantum measurements, as another unique quantum feature, for obtaining quantum-enhanced sensitivity. A sequence of local measurements followed by free evolution of a spin-chain probe allows estimating a local field remotely. For a given time resource, increasing the number of the sequence enhances the precision beyond the standard limit, reaching the ultimate precision bound.
 V. Montenegro, G. S. Jones, S. Bose, and A. Bayat, Phys. Rev. Lett. 129, 120503 (2022).
【报告人简介】Dr. Montenegro was born in Santiago de Chile in the mid-80s. He did the course of the Physics program at Universidad Catolica de Chile (a.k.a, PUC), and obtained B.Sc and M.Sc degree in Physics under the supervision of Prof. Miguel Orszag. His research was focused on Quantum Optics and Quantum Information in cQED. In 2011, he was awarded a 4-year scholarship from the Chilean government (Conicyt) to course a Ph.D. degree at University College London (a.k.a UCL), this time under Prof. Sougato Bose’s supervision. During this time, he investigated on cavity quantum optomechanics and hybrid spin-optomechanical systems. After the Ph.D. degree, he returned to PUC to work as the principal investigator with Prof. Orszag. Currently, he is part of Prof. Abolfazl’s group in Chengdu under the Talent Introduction Program, focused on quantum metrology.