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Floquet engineering of classical systems
Sho Higashikawa, Hiroyuki Fujita, Masahiro Sato
We develop the Floquet-Magnus expansion for a classical equation of motion under a periodic drive that is applicable to both isolated and open systems. For classical systems, known…
Collective modes of vortex lattices in two-component Bose-Einstein condensates under synthetic gauge fields
Takumi Yoshino, Shunsuke Furukawa, Sho Higashikawa +1
We study collective modes of vortex lattices in two-component Bose-Einstein condensates subject to synthetic magnetic fields in mutually parallel or antiparallel directions. By mea…
Floquet chiral magnetic effect
Sho Higashikawa, Masaya Nakagawa, Masahito Ueda
A single Weyl fermion, which is prohibited in static lattice systems by the Nielsen-Ninomiya theorem, is shown to be realized in a periodically driven three-dimensional lattice sys…
Topological unification of time-reversal and particle-hole symmetries in non-Hermitian physics
Kohei Kawabata, Sho Higashikawa, Zongping Gong +2
Topological phases are enriched in non-equilibrium open systems effectively described by non-Hermitian Hamiltonians. While several properties unique to non-Hermitian topological sy…
Topological phases of non-Hermitian systems
Zongping Gong, Yuto Ashida, Kohei Kawabata +3
Recent experimental advances in controlling dissipation have brought about unprecedented flexibility in engineering non-Hermitian Hamiltonians in open classical and quantum systems…