General quantum phase estimation and calibration of a timepiece in a quantum dot system

TL;DR

This paper proposes a physical scheme for quantum phase estimation using double quantum-dot molecules in a microcavity, enabling simultaneous phase estimation and timepiece calibration without requiring identical quantum dots.

Contribution

It introduces a novel method for quantum phase estimation and time calibration in quantum dot systems that does not depend on identical quantum dots and can be generalized to other platforms.

Findings

Successful implementation of quantum phase estimation in quantum dot systems

Calibration of a timepiece based on estimated phase during the process

Method applicable to various quantum systems like atoms and trapped ions

Abstract

We present a physical scheme for implementing quantum phase estimation via weakly coupled double quantum-dot molecules embedded in a microcavity. During the same process of implementation, we can also realize the calibration of a timepiece based on the estimated phase. We use the electron-hole pair states in coupled double quantum-dot molecules to encode quantum information, where the requirement that two quantum dots are exactly identical is not necessary. Our idea can also be generalized to other systems, such as atomic, trapped ion and linear optics system.