Floquet many-body engineering: topology and many-body physics in phase space lattices
Artikel i vetenskaplig tidskrift, 2018

Hamiltonians which are inaccessible in static systems can be engineered in periodically driven many-body systems, i.e., Floquet many-body systems. We propose to use interacting particles in a one-dimensional (1D) harmonic potential with periodic kicking to investigate two-dimensional topological and many-body physics. Depending on the driving parameters, the Floquet Hamiltonian of single kicked harmonic oscillator has various lattice structures in phase space. The noncommutative geometry of phase space gives rise to the topology of the system. We investigate the effective interactions of particles in phase space and find that the point-like contact interaction in quasi-1D real space becomes a long-rang Coulomb-like interaction in phase space, while the hardcore interaction in pure-1D real space becomes a confinement quark-like potential in phase space. We also find that the Floquet exchange interaction does not disappear even in the classical limit, and can be viewed as an effective long-range spin-spin interaction induced by collision. Our proposal may provide platforms to explore new physics and exotic phases by Floquet many-body engineering.

topological physics

Floquet exchange interaction

Floquet physics

phase space dynamics

long-range interaction

many-body dynamics

stroboscopic dynamics


Pengfei Liang

Beijing Normal University

Karlsruher Institut für Technologie (KIT)

Michael Marthaler

Karlsruher Institut für Technologie (KIT)

Universität des Saarlandes

Lingzhen Guo

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Karlsruher Institut für Technologie (KIT)

New Journal of Physics

1367-2630 (ISSN)

Vol. 20 023043


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