Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Takasan, Kazuaki"'
Autor:
Takeuchi, Kazumasa A., Takasan, Kazuaki, Busani, Ofer, Ferrari, Patrik L., Vasseur, Romain, De Nardis, Jacopo
Integrable spin chains with a continuous non-Abelian symmetry, such as the one-dimensional isotropic Heisenberg model, show superdiffusive transport with little theoretical understanding. Although recent studies reported a surprising connection to th
Externí odkaz:
http://arxiv.org/abs/2406.07150
Superconductors exhibit a nonlinear interaction with an applied light, which can resonantly excite the collective amplitude (Higgs) mode. Here we study light-induced dynamics of layered superconductors, where each layer is coupled to adjacent layers
Externí odkaz:
http://arxiv.org/abs/2403.08734
We study a non-Hermitian quantum many-body model in one dimension analogous to the Vicsek model or active spin models, and investigate its quantum phase transitions. The model consists of two-component hard-core bosons with ferromagnetic interactions
Externí odkaz:
http://arxiv.org/abs/2308.04382
Publikováno v:
PTEP 2024 (2024) 8, 083B07
We propose a new method to compute nonlinear transport coefficients in holography, such as nonlinear DC conductivity and nonlinear friction coefficient. The conventional method can be applied only to the models whose action in the gravity dual has th
Externí odkaz:
http://arxiv.org/abs/2303.02633
Publikováno v:
Phys. Rev. B 107, 075141 (2023)
Ballistic transport of a quantum system can be characterized by Drude weight, which quantifies the response of the system to a uniform electric field in the infinitely long timescale. The Drude weight is often discussed in terms of the Kohn formula,
Externí odkaz:
http://arxiv.org/abs/2212.08711
Autor:
Sumita, Shuntaro, Takasan, Kazuaki
Publikováno v:
J. Phys. Soc. Jpn. 91, 074703 (2022)
We show that Weyl superconductivity can be induced by finite supercurrent in noncentrosymmetric spin-orbit-coupled superconductors with line nodes. We introduce a three-dimensional tight-binding model of a tetragonal superconductor in a $D+p$-wave pa
Externí odkaz:
http://arxiv.org/abs/2201.07397
Autor:
Takasan, Kazuaki, Tezuka, Masaki
We investigate the magnetism in tilted fermionic Mott insulators. With a small tilt, the fermions are still localized and form a Mott-insulating state, where the localized spins interact via antiferromagnetic exchange coupling. While the localized st
Externí odkaz:
http://arxiv.org/abs/2111.03857
Despite intensive searches for topological superconductors, the realization of topological superconductivity remains under debate. Previous proposals for the topological $s$-wave, $p$-wave, and chiral $d$-wave superconductivity have both advantages a
Externí odkaz:
http://arxiv.org/abs/2111.03804
We show that finite current in superconductors can induce topological phase transitions, as a result of the deformation of the quasiparticle spectrum by a finite center-of-mass (COM) momentum of the Cooper pairs. To show the wide applicability of thi
Externí odkaz:
http://arxiv.org/abs/2110.06959
The adiabatic transport properties of U(1) invariant systems are determined by the dependence of the ground state energy on the twisted boundary condition. We examine a one-dimensional tight-binding model in the presence of a single defect and find t
Externí odkaz:
http://arxiv.org/abs/2105.11378