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Showing 1–7 of 7 results
Advanced filters: Author: Janne Ruostekoski Clear advanced filters

  • One way to describe a particle is as a localised, 3-dimensional topological state, such as a skyrmion or hopfion. Here, the authors demonstrate and characterise particle-like skyrmionic hopfions in a free-space structured light beam.

    • Danica Sugic
    • Ramon Droop
    • Mark R. Dennis
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-10

  • Skyrmions and hopfions are topological elementary excitations originally discussed in particle physics and field theory, and are also created in optical fields. The authors show theoretically that the topology of light beams can be transformed into optical excitations of an atomic gas to form 3D particle-like skyrmions and knotted hopfions, providing a new route to study these exotic objects in the laboratory.

    • Christopher D. Parmee
    • Mark R. Dennis
    • Janne Ruostekoski
    ResearchOpen Access
    Communications Physics
    Volume: 5, P: 1-8

  • Non-equilibrium phase transitions induced by light have been of great interest in cavities where feedback is provided by cavity mirrors. Here, the fingerprints of phase transitions and intrinsic optical bistability, supported by dipole-dipole interactions alone, are identified in light scattered from planar atomic arrays.

    • Christopher D. Parmee
    • Janne Ruostekoski
    ResearchOpen Access
    Communications Physics
    Volume: 3, P: 1-11

  • Many-body formalism for light transmission is developed to identify light-induced quantum effects and entanglement in atomic planar arrays and disks. Outside the regimes of pronounced quantum effects, potent semiclassical models reveal many-body analogues of power broadening and vacuum Rabi splitting.

    • Robert J. Bettles
    • Mark D. Lee
    • Janne Ruostekoski
    ResearchOpen Access
    Communications Physics
    Volume: 3, P: 1-9

  • Knots are mathematically and physically complex objects that have only rarely been realized in quantum fluids and optics. The authors create knotted quantum wavefunctions of a spinor Bose gas and recognize a close mapping of the results to a recent realization of knots in the polarization of an optical field, exploring common features of topology: a topological atom optics.

    • Maitreyi Jayaseelan
    • Joseph D. Murphree
    • Nicholas P. Bigelow
    ResearchOpen Access
    Communications Physics
    Volume: 7, P: 1-9