Temporal order in periodically driven spins in star-shaped clusters
Abstract
We experimentally study the response of star-shaped clusters of initially unentangled , 10 and 37 nuclear spin- moments to an inexact -pulse sequence, and show that an Ising coupling between the centre and the satellite spins results in robust period-two magnetization oscillations. The period is stable against bath-effects but the amplitude decays with a time scale that depends on the inexactness of the pulse. Simulations reveal a semiclassical picture where the rigidity of the period is due to a randomizing effect of the Larmor precession under the magnetization of surrounding spins. The time scales with stable periodicity increase with net initial magnetization even in the presence of perturbations, indicating a robust temporal ordered phase for large systems with finite magnetization per spin.
Cite
@article{arxiv.1708.08443,
title = {Temporal order in periodically driven spins in star-shaped clusters},
author = {Soham Pal and Naveen Nishad and T S Mahesh and G J Sreejith},
journal= {arXiv preprint arXiv:1708.08443},
year = {2018}
}