Seeding neural network quantum states with tensor network states

Abstract

We find an efficient approach to approximately convert matrix product states (MPSs) into restricted Boltzmann machine wave functions consisting of a multinomial hidden unit through a canonical polyadic (CP) decomposition of the MPSs. This method allows us to generate well-behaved initial neural network quantum states for quantum many-body ground-state calculations in polynomial time of the number of variational parameters and systematically shorten the distance between the initial states and the ground states while increasing the rank of the CP decomposition. We demonstrate the efficiency of our method by taking the transverse-field Ising model as an example and discuss possible applications of our method to more general quantum many-body systems in which the ground-state wave functions possess complex nodal structures.

15 pages, 15 figures, All codes and data used in this manuscript are available at https://github.com/ryuikaneko/mps2rbm

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Cited by in corpus (1)

• Basis dependence of Neural Quantum States for the Transverse Field Ising Model