Real-Time simulation of dissipation-driven quantum Systems

Abstract

We set up a real-Time path integral to study the evolution of quantum systems driven in real-Time completely by the coupling of the system to the environment. For specifically chosen interactions, this can be interpreted as measurements being performed on the system. For a spin-1/2 system, in particular, when the measurement results are averaged over, the resulting sign problem completely disappears, and the system can be simulated with an efficient cluster algorithm.