4.3 Article

Quantum Singular Value Decomposition of Spin Correlation Matrix in One-Dimensional Heisenberg Model

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PHYSICAL SOC JAPAN
DOI: 10.7566/JPSJ.90.054001

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  1. JSPS KAKENHI [18K03474]
  2. Grants-in-Aid for Scientific Research [18K03474] Funding Source: KAKEN

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This study focuses on the singular value decomposition of the spin correlation matrix from the ground state of the one-dimensional antiferromagnetic quantum Heisenberg model. By determining the scaling relation for the singular values as a function of domain size, it was found that the singular values are closely linked to the square of weights of the bases in the ground-state wavefunction, allowing for a precise estimation of the appropriate bases and corresponding weights of the ground-state wavefunction.
We present singular value decomposition of the spin correlation matrix defined from the ground state of the one-dimensional antiferromagnetic quantum Heisenberg model. The decomposition creates a data set that coincides with various domain excitations from classical antiferromagnetic state. We determine the scaling relation for the singular values as a function of the domain size. The singular values are closely related to the square of weights of the bases in the ground-state wavefunction. The nature of the singular value decomposition is to precisely estimate the appropriate bases and corresponding weights of the ground-state wavefunction.

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