98 citations · 936 across the 40 of their papers we have counts for
40 papers
Prominent Dimensional Effects on High-order Harmonic Generation in Strongly Correlated Electron Systems
Kento Uchida, Shintaro Takayoshi, Yuta Murakami +6
Dimensionality strongly affects elementary excitations in correlated quantum materials, yet its impact on extreme nonlinear optical responses remains largely unexplored. Here, we c…
Spinon shift current in a noncentrosymmetric quantum spin chain
Ryosuke Yamashita, Shintaro Takayoshi, Takahiro Morimoto
We theoretically study direct current generation in a quantum spin chain induced by spinon excitations by light irradiation. We consider a one-dimensional (1D) antiferromag…
Geometric Effects on Tunneling in Driven Quantum Systems
Shintaro Takayoshi, Takashi Oka
We review quantum tunneling provoked by external field driving, focusing on the role of geometric effects. The discussion begins with an overview of tunneling phenomena, including…
HPC-Driven Modeling with ML-Based Surrogates for Magnon-Photon Dynamics in Hybrid Quantum Systems
Jialin Song, Yingheng Tang, Pu Ren +8
Simulating hybrid magnonic quantum systems remains a challenge due to the large disparity between the timescales of the two systems. We present a massively parallel GPU-based simul…
Many-body Keldysh Crossover in the DC-driven Haldane Spin Chain
Koichi Okazaki, Shun Okumura, Shintaro Takayoshi +1
We theoretically study nonlinear processes driven by a DC spin-electric field in the antiferromagnetic spin-1 Heisenberg model starting from the ground state in the Haldane phase.…
Many-body effects on high-harmonic generation in Hubbard ladders
Yuta Murakami, Thomas Hansen, Shintaro Takayoshi +2
We show how many-body effects associated with background spin dynamics control the high-harmonic generation (HHG) in Mott insulators by analyzing the two-leg ladder Hubbard model.…
Phase transitions and spin dynamics of the quasi-one dimensional Ising-like antiferromagnet BaCoVO in a longitudinal magnetic field
Shintaro Takayoshi, Quentin Faure, Virginie Simonet +5
By combining inelastic neutron scattering and numerical simulations, we study the quasi-one dimensional Ising-like quantum antiferromagnet BaCoVO in a longitudina…
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.…
Dynamical conductivity of disordered quantum chains
Shintaro Takayoshi, Thierry Giamarchi
We study the transport properties of a one dimensional quantum system with disorder. We numerically compute the frequency dependence of the conductivity of a fermionic chain with n…
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…
Solitonic excitations in the Ising anisotropic chain BaCo2V2O8 under large transverse magnetic field
Quentin Faure, Shintaro Takayoshi, Béatrice Grenier +6
We study the dynamics of the quasi-one-dimensional Ising-Heisenberg antiferromagnet BaCo2V2O8 under a transverse magnetic field. Combining inelastic neutron scattering experiments…
Exploring nonequilibrium phases of photo-doped Mott insulators with Generalized Gibbs ensembles
Yuta Murakami, Shintaro Takayoshi, Tatsuya Kaneko +4
Photo-excited strongly correlated systems can exhibit intriguing non-thermal phases, but the theoretical investigation of them poses significant challenges. In this work, we introd…
Mott Memristors based on Field-Induced Carrier Avalanche Multiplication
Francesco Peronaci, Sara Ameli, Shintaro Takayoshi +2
We present a theory of Mott memristors whose working principle is the non-linear carrier avalanche multiplication in Mott insulators subject to strong electric fields. The internal…
Diagrammatic study of optical excitations in correlated systems
Olivier Simard, Shintaro Takayoshi, Philipp Werner
The optical conductivity contains relevant information on the properties of correlated electron systems. In infinite dimensions, where dynamical mean field theory becomes exact, ve…
High-harmonic generation in one-dimensional Mott insulator
Yuta Murakami, Shintaro Takayoshi, Akihisa Koga +1
We study high-harmonic generation (HHG) in the one-dimensional Hubbard model in order to understand its relation to elementary excitations as well as the similarities and differenc…
Nonadiabatic Nonlinear Optics and Quantum Geometry -- Application to the Twisted Schwinger Effect
Shintaro Takayoshi, Jianda Wu, Takashi Oka
We study the tunneling mechanism of nonlinear optical processes in solids induced by strong coherent laser fields. The theory is based on an extension of the Landau-Zener model wit…
Optomagnonic Barnett effect
Kouki Nakata, Shintaro Takayoshi
Combining the technologies of quantum optics and magnonics, we find that the circularly polarized laser can dynamically realize the quasiequilibrium magnon Bose-Einstein condensate…
Laser control of magnonic topological phases in antiferromagnets
Kouki Nakata, Se Kwon Kim, Shintaro Takayoshi
We study the laser control of magnon topological phases induced by the Aharonov-Casher effect in insulating antiferromagnets (AFs). Since the laser electric field can be considered…
Ultrafast nonequilibrium evolution of excitonic modes in semiconductors
Yuta Murakami, Michael Schüler, Shintaro Takayoshi +1
We study the time evolution of excitonic states after photo-excitation in the one-dimensional spin-less extended Falicov-Kimball model. Several numerical methods are employed and b…
Tomonaga-Luttinger liquid spin dynamics in the quasi-one dimensional Ising-like antiferromagnet BaCoVO
Quentin Faure, Shintaro Takayoshi, Virginie Simonet +8
Combining inelastic neutron scattering and numerical simulations, we study the quasi-one dimensional Ising anisotropic quantum antiferromagnet \bacovo\ in a longitudinal magnetic f…
High-harmonic generation in quantum spin systems
Shintaro Takayoshi, Yuta Murakami, Philipp Werner
We theoretically study the high-harmonic generation (HHG) in one-dimensional spin systems. While in electronic systems the driving by AC electric fields produces radiation from the…
Topological transition between competing orders in quantum spin chains
Shintaro Takayoshi, Shunsuke C. Furuya, Thierry Giamarchi
We study quantum phase transitions between competing orders in one-dimensional spin systems. We focus on systems that can be mapped to a dual-field double sine-Gordon model as a bo…
Topological quantum phase transition in the Ising-like antiferromagnetic spin chain BaCoVO
Q. Faure, S. Takayoshi, S. Petit +13
Since the seminal ideas of Berezinskii, Kosterlitz and Thouless, topological excitations are at the heart of our understanding of a whole novel class of phase transitions. In most…
Field theory of symmetry-protected valence bond solid states in (2+1) dimensions
Shintaro Takayoshi, Pierre Pujol, Akihiro Tanaka
This paper describes a semiclassical field-theory approach to the topological properties of spatially featureless Affleck-Kennedy-Lieb-Tasaki type valence bond solid ground states…