Protecting quantum states from decoherence of finite temperature using weak measurement

TL;DR

This paper introduces a method using measurement reversal from weak measurement to optimally protect quantum states and entanglement against decoherence at finite temperatures.

Contribution

It provides explicit formulas for protecting quantum states and entanglement, advancing quantum error mitigation techniques.

Findings

Effective protection of quantum states demonstrated.

Explicit formulas for protection are derived.

Protection method works at non-zero temperatures.

Abstract

We show how to optimally protect quantum states and quantum entanglement under non-zero temperature based on measurement reversal from weak measurement. In particular, we present explicit formulas of the protection.