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arXiv · 2210.16088

Dynamically generated quadrupole polarization using Floquet adiabatic evolution

Gonzalo Camacho·Christoph Karrasch·Roman Rausch
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Abstract

We investigate the nonequilibrium dynamics of the $S=1$ quantum spin chain subjected to a time-dependent external drive, where the driving frequency is adiabatically decreased as a function of time (``Floquet adiabatic evolution''). We show that when driving the rhombic anisotropy term (known as the ``two-axis countertwisting'' in the context of squeezed spin states) of a N\'eel antiferromagnet, we are able to induce an overall enhancement in the quadrupole polarization, while at the same time suppressing the staggered magnetization order. The system evolves into a new state with a net quadrupole moment and antiferroquadrupolar correlations. This state remains stable at long times once the driving frequency is kept constant. On the other hand, we find that we cannot achieve a quadrupole polarization for the symmetry-protected Haldane phase, which remains robust against such driving.

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Gonzalo Camacho, Christoph Karrasch, Roman Rausch. 2022-10-28. Dynamically generated quadrupole polarization using Floquet adiabatic evolution. https://doi.org/10.1103/physrevresearch.5.023015

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