Quantum Technologies with Cold Rydberg Atoms and Atomic Spins

Abstract

Atoms excited to Rydberg states with high principal quantum numbers have extreme properties such as strong inter-atomic interaction, large values of polarisabilities and long lifetimes. These exotic characteristics and a high degree of controllability make ultra-cold Rydberg atoms versatile atomic building blocks for a variety of quantum technologies, such as scalable Quantum Information networks, precise Quantum Sensing as well as single-photon sources for secure Quantum Communications. Stochastic fluctuations are ubiquitous in all physical systems and can provide valuable information about the characteristic nature and internal structure of the system. Spin correlation spectroscopy enables non-invasive detection of spin coherences of atomic spin ensembles and enables Quantum Sensing via precision magnetometry.