http://dx.doi.org/10.1209/0295-5075/107/57012 (Publisher version)
http://arxiv.org/abs/1403.2495 (Preprint)
1403.2495v1.pdf (Preprint), 2MB
Balzer, K., & Eckstein, M. (2014). Field-assisted doublon manipulation in the Hubbard model: A quantum doublon ratchet. EPL, 107(5): 57012. doi:10.1209/0295-5075/107/57012.