The Least squares and line search in extracting eigenpairs in Jacobi–Davidson method
Sign Up to like & getrecommendations! Published in 2020 at "Bit Numerical Mathematics"
DOI: 10.1007/s10543-020-00806-3
Abstract: The methods used for extracting an approximate eigenpair are crucial in sparse iterative eigensolvers. Using least squares and line search techniques this paper devises a method for an approximate eigenpair extraction. Numerical comparison of the… read more here.
Keywords: least squares; davidson method; jacobi davidson; squares line ... See more keywords
Delta-Davidson method for interior eigenproblem in many-spin systems* * Project supported by the National Natural Science Foundation of China (Grant Nos. 91836101, U1930201, and 11574239).
Sign Up to like & getrecommendations! Published in 2021 at "Chinese Physics B"
DOI: 10.1088/1674-1056/abd74a
Abstract: Many numerical methods, such as tensor network approaches including density matrix renormalization group calculations, have been developed to calculate the extreme/ground states of quantum many-body systems. However, little attention has been paid to the central… read more here.
Keywords: spin systems; delta davidson; many spin; davidson method ... See more keywords