9 papers
Spin-wave growth via Shapiro resonances in a spinor Bose-Einstein condensate
Yuya Imaeda, Kazuya Fujimoto, Yuki Kawaguchi
We theoretically study the resonant phenomenon in a spin-1 Bose-Einstein condensate periodically driven by a quadratic Zeeman coupling. This phenomenon is closely related to the Sh…
Dynamical Scaling of Surface Roughness and Entanglement Entropy in Disordered Fermion Models
Kazuya Fujimoto, Ryusuke Hamazaki, Yuki Kawaguchi
Localization is one of the most fundamental interference phenomena caused by randomness, and its universal aspects have been extensively explored from the perspective of one-parame…
Magnetic soliton: from two to three components with SO(3) symmetry
Xiao Chai, Di Lao, Kazuya Fujimoto +1
Recent theoretical and experimental research has explored magnetic solitons in binary Bose-Einstein condensates (BECs). Here we demonstrate that such solitons are part of an SO(3)…
Magnetic solitons in a spin-1 Bose-Einstein condensate
Xiao Chai, Di Lao, Kazuya Fujimoto +3
Vector solitons are a type of solitary, or non-spreading wavepacket occurring in a nonlinear medium comprised of multiple components. As such, a variety of synthetic systems can be…
Scale-invariant relaxation dynamics in two-component Bose-Einstein condensates with large particle-number imbalance
Kazuya Fujimoto, Kazunori Haneda, Kazue Kudo +1
We theoretically study the scale-invariant relaxation dynamics in segregating two-component Bose-Einstein condensates with large particle-number imbalance, and uncover that random…
Floquet Spinor Bose Gases
Kazuya Fujimoto, Shun Uchino
We introduce a Floquet spinor Bose-Einstein condensate induced by a periodically driven quadratic Zeeman coupling whose frequency is larger than any other energy scales. By examini…