113 citations · 239 across the 5 of their papers we have counts for
5 papers
Multipolar ordering in the three-orbital Hubbard model
Naoya Chikano, Shintaro Hoshino, Hiroshi Shinaoka
The ground-state phase diagrams of the three-orbital t2g Hubbard model are studied using a Hartree-Fock approximation. First, a complete set of multipolar order parameters for t2g…
Efficient ab initio many-body calculations based on sparse modeling of Matsubara Green's function
Hiroshi Shinaoka, Naoya Chikano, Emanuel Gull +6
This lecture note reviews recently proposed sparse-modeling approaches for efficient ab initio many-body calculations based on the data compression of Green's functions. The sparse…
Sparse sampling approach to efficient ab initio calculations at finite temperature
Jia Li, Markus Wallerberger, Naoya Chikano +3
Efficient ab initio calculations of correlated materials at finite temperature require compact representations of the Green's functions both in imaginary time and Matsubara frequen…
irbasis: Open-source database and software for intermediate-representation basis functions of imaginary-time Green's function
Naoya Chikano, Kazuyoshi Yoshimi, Junya Otsuki +1
The open-source library, irbasis, provides easy-to-use tools for two sets of orthogonal functions named intermediate representation (IR). The IR basis enables a compact representat…
Performance analysis of a physically constructed orthogonal representation of imaginary-time Green's function
Naoya Chikano, Junya Otsuki, Hiroshi Shinaoka
The imaginary-time Green's function is a building block of various numerical methods for correlated electron systems. Recently, it was shown that a model-independent compact orthog…