* Continuous-variable cluster states -- I was instrumental in the initial development of this quantum computing platform. Since co-authoring the seminal paper on the topic in 2006, I continue to remain heavily involved in its theoretical and experimental development.
* Relativistic quantum information theory -- Even while physics lacks a complete theory of quantum gravity, quantum information theory provides new tools with which to probe the interface between quantum theory and relativity. My ongoing research in this area includes examining entanglement in curved spacetime and proposing analog-gravity experiments in ion traps and other laboratory systems.
* Foundations of quantum theory -- In the last decade, quantum foundations has matured into an active and respected area of scientific research in its own right as we try to make sense of the mysteries of the quantum world. I remain especially interested in foundational questions as they relate to relativity.