Quantum measurements and high-precision control of quantum states

TL;DR

This paper introduces a fuzzy quantum measurement approach for high-precision quantum state estimation, effectively addressing decoherence and noise effects to improve quantum information processing accuracy.

Contribution

It develops a novel fuzzy measurement method for quantum state reconstruction that accounts for noise and decoherence, enhancing quantum information technology diagnostics.

Findings

Effective quantum state reconstruction under noise

Monitoring information loss due to quantum noise

Application to readout errors and phase relaxation

Abstract

The report presents a general approach for estimating quantum information technologies by means of fuzzy quantum measurements. The developed methods are used for precision reconstruction of quantum states under conditions of significant influence of decoherence and quantum noise. Monitoring of the amount of information about quantum states and their parameters, including the loss of information caused by the effect of quantum noise, is considered. Examples of the developed approach as applied to readout errors and phase relaxation are presented.