Identification of open quantum systems from observable time traces

TL;DR

This paper introduces a new method for estimating parameters of Markovian open quantum systems using measurement time traces, leveraging system realization theory to improve quantum system identification.

Contribution

It generalizes previous Hamiltonian identification techniques to include open quantum systems with Markovian dynamics, enhancing parameter estimation capabilities.

Findings

Effective parameter estimation from measurement data

Applicable to Markovian open quantum systems

Builds on and extends previous Hamiltonian identification methods

Abstract

Estimating the parameters that dictate the dynamics of a quantum system is an important task for quantum information processing and quantum metrology, as well as fundamental physics. In this paper we develop a method for parameter estimation for Markovian open quantum systems using a temporal record of measurements on the system. The method is based on system realization theory and is a generalization of our previous work on identification of Hamiltonian parameters [Phys. Rev. Lett. 113, 080401 (2014)].