3 papers
cond-mat.str-el2019
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…
physics.comp-ph2018
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…
cond-mat.str-el2018
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…