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arXiv:1405.7882 · Physical Review B

Real-time simulation of large open quantum spin systems driven by dissipation

Debasish Banerjee, Fu-Jiun Jiang, M. Kon, U.‐J. Wiese

Published Dec 2, 2014• 10 citations
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Abstract

We consider a large quantum system with spins $\frac{1}{2}$ whose dynamics is driven entirely by measurements of the total spin of spin pairs. This gives rise to a dissipative coupling to the environment. When one averages over the measurement results, the corresponding real-time path integral does not suffer from a sign problem. Using an efficient cluster algorithm, we study the real-time evolution from an initial antiferromagnetic state of the two-dimensional Heisenberg model, which is driven to a disordered phase, not by a Hamiltonian, but by sporadic measurements or by continuous Lindblad evolution.

DOI
10.1103/physrevb.90.241104

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