Quantum science and metrology with mixed-species ion chains

摘要

This chapter reviews recent developments in the use of mixed-species ionchains in quantum information science, frequency metrology and spectroscopy. Agrowing number of experiments have demonstrated new methods in this area,opening up new possibilities for quantum state generation, quantum control ofpreviously inaccessible ions, and the ability to maintain quantum control overextended periods. I describe these methods, providing details of the techniqueswhich are required in order to work with such systems. In addition, I presentperspectives on possible future uses of quantum logic spectroscopy techniques,which have the potential to extend precision control of atomic ions to a largerange of atomic and molecular species.