Theory Division

Investigation of strongly interacting quantum field theories (QFTs) remains one of the outstanding challenges of modern physics. Quantum simulation has the potential to be a crucial technique towards solving this problem. In this talk, I will describe analog quantum simulators for strongly interacting QFTs using mesoscopic quantum electronic circuit lattices. The tunable, robust and dispersive... More »

We study the propagators of a scalar field coupled to a lattice regularization of gravity in the limit there is no back-reaction from the matter.  We extract the renormalized mass, and binding energy between scalar particles and attempt to recover the known, non-relativistic, tree-level calculation in the infinite-volume, continuum limit  for the scaling of the... More »

We constructed a detailed digital twin of the UK population, with supreme social and geographical granularity, representing 55 million residents in England and Wales and tracing their daily movements and activities. The infection is propagated through the virtual population through simulated social contacts, and the progress of the disease in infected individuals and their trajectory... More »

Over the past five decades, Euclidean lattice field theory has matured into a broad program capable of making precise QCD predictions. While its success is undeniable, certain problems in real time and at finite density elude it due to sign problems. Early on, Feynman pointed out that many of these problems are naturally solvable on... More »