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.
@article{arxiv.1510.08899,
title = {Real-time simulation of dissipation-driven quantum systems},
author = {Debasish Banerjee and Florian Hebenstreit and Fu-Jiun Jiang and Mark Kon and Uwe-Jens Wiese},
journal= {arXiv preprint arXiv:1510.08899},
year = {2015}
}
Comments
Proceedings of the International Conference on Lattice Field Theory 2015. Extra footnote added