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Integrable Matrix Models in Discrete Space-Time
by Žiga Krajnik, Enej Ilievski, Tomaž Prosen
- Published as SciPost Phys. 9, 038 (2020)
|As Contributors:||Enej Ilievski · Žiga Krajnik|
|Arxiv Link:||https://arxiv.org/abs/2003.05957v2 (pdf)|
|Date submitted:||2020-07-23 14:40|
|Submitted by:||Ilievski, Enej|
|Submitted to:||SciPost Physics|
We introduce a class of integrable dynamical systems of interacting classical matrix-valued fields propagating on a discrete space-time lattice, realized as many-body circuits built from elementary symplectic two-body maps. The models provide an efficient integrable Trotterization of non-relativistic $\sigma$-models with complex Grassmannian manifolds as target spaces, including, as special cases, the higher-rank analogues of the Landau-Lifshitz field theory on complex projective spaces. As an application, we study transport of Noether charges in canonical local equilibrium states. We find a clear signature of superdiffusive behavior in the Kardar-Parisi-Zhang universality class, irrespectively of the chosen underlying global unitary symmetry group and the quotient structure of the compact phase space, providing a strong indication of superuniversal physics.
Published as SciPost Phys. 9, 038 (2020)
Author comments upon resubmission
List of changes
- We have addressed the points by one of the referees
(short notational clarifications added when appropriate, fixed misprints).
- We have resolved and a number misprints throughout the text.
Submission & Refereeing History
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Reports on this Submission
Anonymous Report 1 on 2020-8-13 Invited Report
The authors took into account the remarks made by the referees. I recommend the paper for publication in SciPost.