Feb 12, 2019 3:45 pm - Dale Hall 211 - Colloquium
Robert Lewis-Swan - JILA, CU Boulder
A tale of oscillators and spins: A new paradigm for engineering many-body quantum states

The broad range of experimental platforms within the realm of atomic, molecular and optical (AMO) physics are widely being pursued as the underlying  building blocks for future quantum technologies: From quantum simulators that may explain the behavior of strongly correlated material systems, to forming the basis of today’s most precise sensors. Progress in this direction has been predominantly fueled by the exquisite level of single-particle control and detection available in AMO systems. A key future challenge is to expand this single-particle control for the purposes of creating tailored many-body systems, in particular by engineering controllable coherent interactions to generate useful many-body entanglement. 
In this colloquium I will discuss two apparently distinct but closely related systems currently being investigated in Boulder pursuant to this research direction: non-local atomic interactions mediated by photons [Science 361, 259 (2018)], and a spin-boson interaction realized by coupling the internal states of an ensemble of trapped ions forming a 2D  crystal and their associated phonon modes [PRL 121, 040503 (2018)]. I will present our results in benchmarking the engineered Hamiltonians in both of these contexts, before discussing proposals to use these systems for quantum sensing, simulation and the study of dynamics of quantum information.