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  • Invitation. You are invited to submit your paper to a special issue of the "Symmetry" journal dedicated to

    Harmonic Oscillators in Modern Physics

    Starting from two coupled oscillators, Paul A. M. Dirac derived two coupled Lorentz groups allowing mass variations. In so doing,

    1. he derived the O(3,2) group for space-time symmetries,

    2. two-mode squeezed states,

    3. symmetries of the Poincaré sphere,

    4. Sp(4) symmetries in classical mechanics.

    Dirac pulled out many other rabbits from his hat of oscillators.

  • Even for us, it is fun to play around with harmonic oscillators. You are invited to send your fun paper(s) to this special issue.