[15p-K406-1~9] KS.2 Quantum Information Engineering Group

3:45 PM - 4:00 PM JST(6:45 AM - 7:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[15p-K406-9] Quantum Fisher Information under Feedback Control

〇(M1)Hayato Yunoki¹, Yoshihiko Hasegawa¹ (1.Univ. Tokyo)

Keywords:

quantum Fisher information,feedback control,quantum speed limit

Quantum Fisher information is a quantity that characterises the accuracy limit in the estimation of the parameters of quantum states. In this study, quantum Fisher information is derived analytically for the case of feedback from a jump measurement of a Poisson process and for the case of feedback from a homodyne measurement of a Gaussian process. This makes it possible to formulate quantum speed limits and quantum thermodynamic uncertainty relations under feedback control.