Quantum metrology in complex systems and experimental verification by quantum simulation

TL;DR

This paper reviews quantum metrology in complex systems and demonstrates how quantum simulation experiments can verify theoretical schemes and reveal physical phenomena like bound states and photon switches.

Contribution

It provides a comprehensive overview of quantum metrology in complex systems and highlights the role of quantum simulation in experimental verification.

Findings

Quantum simulation verifies theoretical metrology schemes.

Physical phenomena like bound states are demonstrated.

Quantum information advances enable complex system analysis.

Abstract

Quantum metrology based on quantum entanglement and quantum coherence improves the accuracy of measurement. In this paper, we briefly review the schemes of quantum metrology in various complex systems, including non-Markovian noise, correlated noise, quantum critical system. On the other hand, the booming development of quantum information allows us to utilize quantum simulation experiments to test the feasibility of various theoretical schemes and demonstrate the rich physical phenomena in complex systems, such as bound states in one-dimensional coupled cavity arrays, single-photon switches and routers.