157 citations · 1.9k across the 60 of their papers we have counts for
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Spin, charge and -spin separation in one-dimensional photo-doped Mott insulators
Yuta Murakami, Shintaro Takayoshi, Tatsuya Kaneko +2
We show that effectively cold metastable states in one-dimensional photo-doped Mott insulators described by the extended Hubbard model exhibit spin, charge and -spin separation.…
Efficient Scheme for Time-dependent Thermal Pure Quantum State: Application to the Kitaev Model with Armchair Edges
H. Taguchi, A. Koga, Y. Murakami
We consider the time-dependent thermal pure quantum state method and introduce the efficient scheme to evaluate the change in physical quantities induced by the time-dependent pert…
Optical response of the tightbinding model on the Fibonacci chain
Hiroki Iijima, Yuta Murakami, Akihisa Koga
We theoretically study the optical conductivity of the tightbinding model which has two types of the hopping integrals arranged in the Fibonacci sequence. Due to the lack of the tr…
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…
High-harmonic generation in the Rice-Mele model: Role of intraband current originating from interband transition
Kohei Nagai, Yuta Murakami, Akihisa Koga
We consider high-harmonic generation (HHG) in the Rice-Mele model to study the role of the intraband current originating from the change of the intraband dipole via interband trans…
Doping and gap-size dependence of high-harmonic generation in graphene : Importance of consistent formulation of light-matter coupling
Yuta Murakami, Michael Schüler
High-harmonic generation (HHG) in solids is a fundamental nonlinear phenomenon, which can be efficiently controlled by modifying system parameters such as doping-level and temperat…
Scattering phenomena for spin transport in Kitaev spin liquid
Joji Nasu, Yuta Murakami, Akihisa Koga
The Kitaev model exhibits a canonical quantum spin liquid as a ground state and hosts two fractional quasiparticles, itinerant Majorana fermion and localized flux excitation. The f…
Second-order magnetic responses in quantum magnets: Magnetization under ac magnetic fields
Tatsuya Kaneko, Yuta Murakami, Shintaro Takayoshi +1
We investigate second-order magnetic responses of quantum magnets against ac magnetic fields. We focus on the case where the component of the spin is conserved in the unperturb…
Anomalous temperature dependence of high-harmonic generation in Mott insulators
Yuta Murakami, Kento Uchida, Akihisa Koga +2
We reveal the crucial effect of strong spin-charge coupling on high-harmonic generation (HHG) in Mott insulators. In a system with antiferromagnetic correlations, the HHG signal is…
Thermally enhanced Majorana-mediated spin transport in the Kitaev model
Hirokazu Taguchi, Yuta Murakami, Akihisa Koga
We study how stable the Majorana-mediated spin transport in a quantum spin Kitaev model is against thermal fluctuations. Using the time-dependent thermal pure quantum state method,…