Quantum science and metrology with mixed-species ion chains

TL;DR

This paper reviews recent advances in using mixed-species ion chains for quantum information, metrology, and spectroscopy, highlighting new methods, control techniques, and future applications in quantum logic spectroscopy.

Contribution

It provides a comprehensive overview of experimental methods and discusses future potential of quantum logic spectroscopy with mixed-species ion chains.

Findings

Demonstrated new quantum control methods

Extended quantum state generation techniques

Potential for broad atomic and molecular spectroscopy

Abstract

This chapter reviews recent developments in the use of mixed-species ion chains in quantum information science, frequency metrology and spectroscopy. A growing number of experiments have demonstrated new methods in this area, opening up new possibilities for quantum state generation, quantum control of previously inaccessible ions, and the ability to maintain quantum control over extended periods. I describe these methods, providing details of the techniques which are required in order to work with such systems. In addition, I present perspectives on possible future uses of quantum logic spectroscopy techniques, which have the potential to extend precision control of atomic ions to a large range of atomic and molecular species.