Time evolution of projected entangled pair states in the single layer picture

Details Time evolution of projected entangled pair states in the single layer picture Time evolution of projected entangled pair states in the single layer picture

2011-03-11

arxiv.org/abs/1103.2343v1

Phys. Rev. A 83, 052321 (2011)

Physics

Quantum Physics

7 pages, 5 pdf figures, revtex4-1

Scientific paper

10.1103/PhysRevA.83.052321

We propose an efficient algorithm for simulating quantum many-body systems in two spatial dimensions using projected entangled pair states. This is done by approximating the environment, arising in the context of updating tensors in the process of time evolution, using a single-layered tensor network structure. This significantly reduces the computational costs and allows simulations in a larger submanifold of the Hilbert space as bounded by the bond dimension of the tensor network. We present numerical evidence for stability of the method on an antiferromagnetic isotropic Heisenberg model where good agreement is found with the available accurate results.

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