# 必威体育官方app

Learn about our response to COVID-19, including freely available research and expanded remote access support.

## Volume 125, Issue 19

##### 6 November 2020
###### On the Cover

In a two-dimensional driven Hubbard model, spin-1/2 fermions (arrows) can hop between the neighboring sites (circles), while nearest neighbor singlet pairs (ellipses) are bound by a superexchange energy and can hop from one bond to a neighboring bond.

###### From the article:

Hongmin Gao, Jonathan R. Coulthard, Dieter Jaksch, and Jordi Mur-Petit
Phys. Rev. Lett. 125, 195301 (2020)