Coherent Control of Population and Quantum Coherence in Superconducting Circuits

TL;DR

This paper reviews advances in controlling quantum states and coherence in macroscopic superconducting circuits, highlighting progress in manipulating quantum populations and optical properties in large-scale quantum systems.

Contribution

It provides a comprehensive overview of recent progress in achieving coherent control in superconducting circuits, bridging microscopic quantum principles with macroscopic applications.

Findings

Progress in controlling population distributions in superconducting circuits

Manipulation of absorption and refractive index in large-scale quantum systems

Demonstration of macroscopic quantum coherence control

Abstract

Quantum mechanics, with its counterintuitive principles and probabilistic nature, has long been confined to the microscopic realm of atoms and photons. Yet, recent breakthroughs have pushed the boundaries of quantum behavior into the macroscopic world, where objects are visible to the naked eye and governed by classical physics. This review article traces the extraordinary progress toward achieving coherent control of population distributions among multiple quantum levels, as well as manipulation of absorption and refractive index, in such large-scale quantum systems, a feat once considered beyond reach.