Multi-configurational Symmetrized Projector Quantum Monte Carlo Studies of excited states of the Hubbard model
Bhargavi Srinivasan, S. Ramasesha, H. R. Krishnamurthy (Indian, Institute of Science)
TL;DR
This paper introduces a new multi-configurational Symmetrized Projector Quantum Monte Carlo method for calculating excited state properties of Hubbard models, showing good agreement with existing techniques.
Contribution
The paper presents a novel MSPQMC method for excited states in Hubbard models, enhancing computational accuracy and efficiency.
Findings
MSPQMC results agree well with exact and DMRG results.
The method accurately computes energies and correlation functions.
Applicable to both finite and longer Hubbard chains.
Abstract
We develop a novel multi-configurational Symmetrized Projector Quantum Monte Carlo (MSPQMC) method to calculate excited state properties of Hubbard models. We compare the MSPQMC results for finite Hubbard chains with exact results (where available) or with Density Matrix Renormalization Group (DMRG) results for longer chains. The energies and correlation functions of the excited states are in good agreement with those obtained from the alternate techniques.
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