paper

Dirac quantum time mirror

arXiv:1603.07503 · doi:10.1103/PhysRevB.95.165421

Abstract

Both metaphysical and practical considerations related to time inversion have intrigued scientists for generations. Physicists have strived to devise and implement time-inversion protocols, in particular different forms of "time mirrors" for classical waves. Here we propose an instantaneous time mirror for quantum systems, i.e., a controlled time discontinuity generating wave function echoes with high fidelities. This concept exploits coherent particle-hole oscillations in a Dirac spectrum in order to achieve population reversal, and can be implemented in systems such as (real or artificial) graphene.

Extended discussion of the Dirac time mirror, in form accepted for publication in PRB (8 pages, 3 figures, 1 video in Suppl. Mat.). The non-linear time reversal protocol was removed, and its discussion will appear in modified form as another standalone arXiv entry

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