DOAJ Open Access 2025

Topological excitations at time vortices in periodically driven systems

Gilad Kishony Ori Grossman Netanel Lindner Mark Rudner Erez Berg

Abstrak

Abstract We consider two-dimensional periodically driven systems of fermions with particle-hole symmetry. Such systems support non-trivial topological phases, including ones that cannot be realized in equilibrium. We show that a space-time defect in the driving Hamiltonian, dubbed a “time vortex,” can bind π Majorana modes. A time vortex is a point in space around which the phase lag of the Hamiltonian changes by a multiple of 2π. We demonstrate this behavior on a periodically driven version of Kitaev’s honeycomb spin model, where $${{\mathbb{Z}}}_{2}$$ Z 2 fluxes and time vortices can realize any combination of 0 and π Majorana modes. We show that a time vortex can be created using Clifford gates, simplifying its realization in near-term quantum simulators.

Topik & Kata Kunci

Materials of engineering and construction. Mechanics of materials Atomic physics. Constitution and properties of matter

Penulis (5)

Gilad Kishony

Ori Grossman

Netanel Lindner

Mark Rudner

Erez Berg

Format Sitasi

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Kishony, G., Grossman, O., Lindner, N., Rudner, M., Berg, E. (2025). Topological excitations at time vortices in periodically driven systems. https://doi.org/10.1038/s41535-025-00745-8

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Informasi Jurnal

Tahun Terbit: 2025
Sumber Database: DOAJ
DOI: 10.1038/s41535-025-00745-8
Akses: Open Access ✓