Driving a many-body spin system periodically opens up control over the geometry of its quasienergy landscape that undriven models simply don’t have. This paper shows that singularities can be engineered into the density of quasienergy states by tuning an external control parameter, with logarithmic divergences appearing at the saddle points of that landscape.
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- Authors: V. M. Bastidas, G. Engelhardt, P. Pérez-Fernández, Malte Vogl, and T. Brandes
- Journal: Physical Review A 90, 063628 (2014)
- DOI: 10.1103/physreva.90.063628