Meissner to vortex phase transition in a two-leg ladder in artificial gauge field M. DiDio, R. Citro, S. De Palo, E. Orignac and M.-L. Chiofalo Eur. Phys. J. Special Topics, 224 3 (2015) 525-531 Published online: 09 April 2015 DOI: 10.1140/epjst/e2015-02382-2