Speaker
Dr
Debasish Banerjee
(Albert Einstein Center, University of Bern)
Description
Simulating real-time dynamics of large quantum systems is a notoriously difficult problem. Diagonalizing the Hamiltonian is exponentially expensive, while the configurations contribute a complex weight to the real-time path integral leading to a severe sign-problem. In this particular case, we consider a system of spins whose dynamics is driven by measurements of nearest neighbor spin pair. Remarkably, averaging over the measurement results lead to a sign-problem free real-time path integral which can be simulated with an efficient cluster algorithm.
