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

We consider a large quantum system with spins [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 suff...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2014-12, Vol.90 (24), Article 241104
Main Authors: Banerjee, D., Jiang, F.-J., Kon, M., Wiese, U.-J.
Format: Article
Language:English
Subjects:
Algorithms
Clusters
Condensed matter
Dissipation
Dynamical systems
Dynamics
Evolution
Real time
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Summary:We consider a large quantum system with spins [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.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.90.241104