Condensed Matter Theory

Interacting spins under quasiperiodic drive

by Dr Sayak Ray

Europe/Berlin
3.014 (PI)

3.014

PI

Nussallee 12 53115 Bonn
Description

In this talk, I will discuss the dynamics of a system subjected to quasiperiodic drive. As a toy model, I will consider a spin-S object subjected to \delta-function kicks which are applied in the transverse direction of the magnetic field and generated from a Fibonacci sequence. In the large spin classical limit, the phase space appears to be chaotic; interestingly, however, the Lyapunov exponent turns out to be zero and thus the dynamics remain phase-coherent. I will show that such dynamics are similar to a strange non-chaotic attractor with fractal nature which is also present in the Floquet eigenstates. Interaction with another spin results in ergodic dynamics leading to infinite temperature thermalization.