Tangent space to the manifold of critical classical Hamiltonians representable by tensor networks.

Wu, Yantao · Phys Rev E · 2019

basic_science · Level V

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Abstract

We introduce a scheme to perform Monte Carlo renormalization group with the coupling constants of the system Hamiltonian encoded in a tensor network. With this scheme we compute the tangent space to the manifold of the critical Hamiltonians representable by a tensor network at the nearest-neighbor critical coupling for three models: the two- and three-dimensional Ising models and the two-dimensional three-state Potts model.