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quant-ph2023
Error tradeoff relation for estimating the unitary-shift parameter of a relativistic spin-1/2 particle
Shin Funada, Jun Suzuki
The purpose of this paper is to discuss the existence of a nontrivial tradeoff relation for estimating two unitary-shift parameters in a relativistic spin-1/2 system. It is shown t…
quant-ph2023
Bayesian Nagaoka-Hayashi Bound for Multiparameter Quantum-State Estimation Problem
Jun Suzuki
In this work we propose a Bayesian version of the Nagaoka-Hayashi bound when estimating a parametric family of quantum states. This lower bound is a generalization of a recently pr…