60 citations · 303 across the 13 of their papers we have counts for
13 papers
Quantum geometric magnetic monopole and two-phase superconductivity in CeRhAs
Kosuke Nogaki, Youichi Yanase
Recent angle-resolved photoemission spectroscopy (ARPES) and density functional theory plus Hubbard (DFT+) studies revealed that a heavy-fermion superconductor CeRhAs$_2…
Symmetry-adapted sample-based quantum diagonalization: Application to lattice model
Kosuke Nogaki, Steffen Backes, Tomonori Shirakawa +2
We present a symmetry-adapted extension of sample-based quantum diagonalization (SQD) that rigorously embeds space-group symmetry into the many-body subspace sampled by quantum har…
Field-induced superconductivity mediated by odd-parity multipole fluctuation
Kosuke Nogaki, Youichi Yanase
Field-induced superconductivity has long presented a counterintuitive phenomenon and a pivotal challenge in condensed matter physics. In this Letter, we introduce a mechanism for a…
Correlation-induced Fermi surface evolution and topological crystalline superconductivity in CeRh2As2
Jun Ishizuka, Kosuke Nogaki, Manfred Sigrist +1
Locally noncentrosymmetric structures in crystals are attracting much attention owing to emergent phenomena associated with the sublattice degree of freedom. The newly discovered h…
Coexistence of near-EF flat band and van Hove singularity in a two-phase superconductor
Xuezhi Chen, Le Wang, Jun Ishizuka +9
In quantum many-body systems, particularly, the ones with large near-EF density states, like flat bands or van Hove singularity (VHS), electron correlations often give rise to rich…
Magnetism and superconductivity in mixed-dimensional periodic Anderson model for UTe
Ryuji Hakuno, Kosuke Nogaki, Youichi Yanase
UTe is a strong candidate for a topological spin-triplet superconductor, and it is considered that the interplay of magnetic fluctuation and superconductivity is essential fo…
Bosonic Nevanlinna Analytic Continuation
Kosuke Nogaki, Hiroshi Shinaoka
Analytical continuation (AC) connects theoretical calculations and experimentally measurable quantities. The recently proposed Nevanlinna AC method is capable of accurately reprodu…
Nevanlinna.jl: A Julia implementation of Nevanlinna analytic continuation
Kosuke Nogaki, Jiani Fei, Emanuel Gull +1
We introduce a Julia implementation of the recently proposed Nevanlinna analytic continuation method. The method is based on Nevanlinna interpolants and, by construction, preserves…
Multiscale space-time ansatz for correlation functions of quantum systems based on quantics tensor trains
Hiroshi Shinaoka, Markus Wallerberger, Yuta Murakami +4
Correlation functions of quantum systems -- central objects in quantum field theories -- are defined in high-dimensional space-time domains. Their numerical treatment thus suffers…
sparse-ir: optimal compression and sparse sampling of many-body propagators
Markus Wallerberger, Samuel Badr, Shintaro Hoshino +13
We introduce sparse-ir, a collection of libraries to efficiently handle imaginary-time propagators, a central object in finite-temperature quantum many-body calculations. We levera…
Even-odd parity transition in strongly correlated locally noncentrosymmetric superconductors : An application to CeRhAs
Kosuke Nogaki, Youichi Yanase
The discovery of the multiple - phase diagram of CeRhAs offers a new route to designing topological superconductors. Although weak-coupling theories explain the exper…
Topological crystalline superconductivity in locally noncentrosymmetric CeRhAs
Kosuke Nogaki, Akito Daido, Jun Ishizuka +1
Recent discovery of superconductivity in CeRhAs clarified an unusual - phase diagram with two superconducting phases [Khim et al. arXiv:2101.09522]. The experimental…
Strongly parity-mixed superconductivity in Rashba-Hubbard model
Kosuke Nogaki, Youichi Yanase
Heterostructures containing strongly correlated electron systems provide a platform to clarify interplay of electron correlation and Rashba spin-orbit coupling in unconventional su…