Spectroscopy of cold rubidium Rydberg atoms for applications in quantum information

TL;DR

This paper reviews the experimental and theoretical advances in laser and microwave spectroscopy of cold rubidium Rydberg atoms, highlighting their potential for quantum information processing due to their unique properties and strong interactions.

Contribution

It provides a comprehensive review of recent work on Rydberg atom spectroscopy and their applications in quantum computing, including experimental techniques and theoretical insights.

Findings

Demonstrated precision spectroscopy of cold Rb Rydberg atoms

Analyzed long-range interactions relevant for quantum gates

Reviewed potential for scalable quantum information systems

Abstract

Atoms in highly excited (Rydberg) states have a number of unique properties which make them attractive for applications in quantum information. These are large dipole moments, lifetimes and polarizabilities, as well as strong long-range interactions between Rydberg atoms. Experimental methods of laser cooling and precision spectroscopy enable the trapping and manipulation of single Rydberg atoms and applying them for practical implementation of quantum gates over qubits of a quantum computer based on single neutral atoms in optical traps. In this paper, we give a review of the experimental and theoretical work performed by the authors at the Rzhanov Institute of Semiconductor Physics SB RAS and Novosibirsk State University on laser and microwave spectroscopy of cold Rb Rydberg atoms in a magneto-optical trap and on their possible applications in quantum information. We also give a brief review of studies done by other groups in this area.