We will discuss a model with ultracold atoms confined in optical superlattices. In particular, we will study the ground-state properties of two spin-1 bosons trapped in a double-well potential. Depending on the external magnetic field and biquadratic interactions, different phases of magnetic order are realized. Applying von Neumann entropy and the number of relevant orbitals, we will quantify the bipartite entanglement between particles. Changing the values of the parameters determining the superlattices, we can switch the system between differently entangled states.
© 2014 Optical Society of America
Original Manuscript: April 1, 2014
Revised Manuscript: May 29, 2014
Manuscript Accepted: June 8, 2014
Published: July 15, 2014
Artur Barasiński, Wiesław Leoński, and Tomasz Sowiński, "Ground-state entanglement of spin-1 bosons undergoing superexchange interactions in optical superlattices," J. Opt. Soc. Am. B 31, 1845-1852 (2014)