Static Bias Controllers for XX Spin-1/2 Rings

Propagation of information encoded in spin degrees of freedom through networks of coupled spins enables important applications in spintronics and quantum information processing. This data set contains the results of applying optimal control of information propagation in networks of spin-1/2 particles with uniform nearest neighbor XX-couplings forming a ring with a single excitation in the network as simple prototype of a router for spin-based information. The control is implemented via spatially distributed potentials, which remain constant during information transfer. The limited degrees of freedom makes finding a control that maximizes the transfer probability in a short time difficult.<div><br></div><div>For further details see</div><div> <p>S. G. Schirmer, E. Jonckheere, F. C. Langbein. Design of Feedback Control Laws for Information Transfer in Spintronics Networks. In preparation, 2016.</p> <p>F. C. Langbein, S. G. Schirmer, E. Jonckheere. <a href="https://langbein.org/langbein2015/">Time optimal information transfer in spintronics networks</a>. Proc. IEEE 54th Annual Conference on Decision and Control (CDC), pp. 6454-6459, Osaka, Japan, December 15-18, 2015. [<a href="http://dx.doi.org/10.1109/CDC.2015.7403236" target="_blank">DOI:10.1109/CDC.2015.7403236</a>] [<a href="http://arxiv.org/abs/1508.00928" target="_blank">arXiv:1508.00928</a>]</p>