Accelerating quantum dynamics with long-range interactions

Dr. Jeremy Young
Postdoctoral Fellow, JILA, NIST and the University of Colorado

Abstract

One of the major goals in the field of quantum science is to utilize the properties of quantum mechanics for applications in quantum computation, quantum simulation, and quantum sensing. In order to address this goal, a variety of different many-body quantum platforms have been developed. Many of these quantum platforms exhibit long-range interactions, particularly power-law interactions, including Rydberg atoms, polar molecules, trapped ions, among others. This gives rise to a natural question: how does the long-range nature of these interactions affect the resulting quantum evolution?

In this colloquium, I will discuss some of the ways that these long-range interactions have been utilized both for studying new many-body physics and for applications in quantum science. I will focus in particular on how long-range interactions can be used to accelerate entanglement generation in two contexts. First, I will illustrate how long-range interactions can be used to provide exponential speedups over short-range interactions in entanglement spreading and state transfer and discuss how this can be achieved with Rydberg atoms and polar molecules. Second, I will present an approach for engineering multi-qubit gates by dressing Rydberg atoms with coherent light, which provides a means for tuning the underlying Rydberg interactions.

Dr. Young is a candidate for the tenure-track faculty position in theoretical condensed matter physics or theoretical optics.  There are opportunities to meet with Dr. Young during his visit, please contact Melissa Balson to be added to the schedule.

Coffee, tea will be served in STI B before the colloquium.