“Quantum sensing” describes the use of a quantum system, quantum properties, or quantum
phenomena to perform a measurement of a physical quantity. Historical examples of …

During the last ten years, superconducting circuits have passed from being interesting
physical devices to becoming contenders for near-future useful and scalable quantum …

Tests of quantum mechanics on a macroscopic scale require extreme control over
mechanical motion and its decoherence,–. Quantum control of mechanical motion has been …

Conversion of electrical and optical signals lies at the foundation of the global internet. Such
converters are used to extend the reach of long-haul fibre-optic communication systems and …

Efficient interconversion of both classical and quantum information between microwave and
optical frequency is an important engineering challenge. The optomechanical approach with …

Quantum transduction, the process of converting quantum signals from one form of energy to
another, is an important area of quantum science and technology. The present perspective …

Coherent upconversion of terahertz and mid-infrared signals into visible light opens new
horizons for spectroscopy, imaging, and sensing but represents a challenge for conventional …

Conversion between signals in the microwave and optical domains is of great interest both
for classical telecommunication and for connecting future superconducting quantum …

An extensively pursued current direction of research in physics aims at the development of
practical technologies that exploit the effects of quantum mechanics. As part of this ongoing …

In this review we look at the concepts and state-of-the-art concerning the strong coupling of
surface plasmon-polariton modes to states associated with quantum emitters such as …