Fall 2021

The development of atomic clocks with systematic uncertainties in the 10-18 range enables searches for the variation of fundamental constants, dark matter, and violations of Lorentz invariance. I will give an overview of dark matter searches and other fundamental physics studies with atomic and nuclear clocks and focus on development of clocks with the highest sensitivities to new physics. I will discuss recent advances in theory of novel clocks based on highly-charged ions and efforts to develop a nuclear clock.

The recent successful computation beyond the capability of classical computers has brought considerable attention to the Noisy Intermediate Scale Quantum (NISQ) processors. The only way to evaluate the promise of NISQ devices is to implement algorithms on them that are of interest to the scientific community.

The physics of cooperative atoms/radiators in regular 2D arrays is dominated by two properties: first, a strongly frequency-selective reflectivity and second, the ability to confine polariton modes cleanly on the surface. This makes such a system highly sensitive to and controllable by light fields. Applications of these systems include quantum information, metrology, and nonlinear single-photon techniques.

The fractional quantum Hall system is one of the most strongly correlated systems in the world, because its physics is fully dictated by the interaction between the electrons, with their kinetic energy having been fully suppressed by the magnetic field. Somewhat surprisingly, much of the vast phenomenology of the fractional quantum Hall effect is now understood not only qualitatively but with a microscopic precision that rivals, ideally, that of atomic physics. This has become possible thanks to the emergence of the topological particle called composite fermion.