2021/05/31 by Lingzhen Guo, Vittorio Peano, Florian Marquardt
Chemistry · Mathematics · Physics and Astronomy · #Chemistry #Combinatorics #Computer science #Condensed matter physics #Crystal (programming language) #Crystal structure #Crystallography #Enhanced Data Rates for GSM Evolution #Geometry #Local symmetry #Mathematics #Phase (matter) #Phase space #Physics #Quantum Mechanics and Non-Hermitian Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Space (punctuation) #Space group #Symmetry (geometry) #Topological Materials and Phenomena #Topology (electrical circuits) #Vibration #X-ray crystallography #cond-mat.mes-hall #cond-mat.quant-gas #quant-ph
paper · pdf · doi:10.1103/physrevb.105.094301
published as Phys. Rev. B 105, 094301 (2022), Editors' Suggestion · 19 pages, 6 figures; Supplemental video at https://owncloud.gwdg.de/index.php/s/VeQjlZwGoYNN7a4
arxiv created 2022/02/15 · openalex publication_date 2022/03/03 · arxiv updated 2022/03/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
It was recently discovered that atoms subject to a time-periodic drive can give rise to a crystal structure in phase space. In this work, we point out the atom-atom interactions give rise to collective phonon excitations of phase-space crystal via a pairing interaction with intrinsically complex phases that can lead to a phonon Chern insulator, accompanied by topologically robust chiral transport along the edge of the phase-space crystal. This topological phase is realized even in scenarios where the time-reversal transformation is a symmetry, which is surprising because the breaking of time-reversal symmetry is a strict precondition for topological chiral transport in the standard setting of real-space crystals. Our work has also important implications for the dynamics of 2D charged particles in a strong magnetic field.