| 报告题目： |
Berry curvature as a lower bound for multiparameter estimation |
| 报告人： |
王晓光 |
| 报告人单位： |
浙江大学 |
| 报告时间： |
2018年5月18日下午16点 |
| 报告地点： |
引力中心三楼会议室 |
| 报告摘要： |
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Quantum Fisher information (QFI) is a key concept in quantum state estimation, and Berry curvature (BC) is another basic concept to describe geometric properties of quantum states. In this paper, we consider pure states undergoing unitary parametrization processes and show that the BC serves as a lower bound for the product of QFIs corresponding to two different parameters through the Heisenberg uncertainty relation. This relation between QFI and BC implies that the estimation precisions of two different parameters are mutually restrictive due to finite BC, and the notion of QFI squeezing is introduced. A scenario of general su(2) parametrization is considered in detail to verify the relation between the QFI and BC. |
| 报告人简介： |
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1995年硕士毕业于东北师范大学，1998年博士毕业于长春光机所。先后在中科院物理所，丹麦Klaus Molmer组，意大利Paolo Zanardi组，澳大利亚Barry C Sanders组进行博士后研究。目前为浙江大学物理系教授。2010年获得国家杰出青年基金。目前主要从事量子参数估计，量子力学基本问题，量子信息理论等领域的研究，已发表文章200多篇，总引用5400余次，H因子37。单篇最高引用460余次，引用超过一百的文章13篇。 |
