Novel polaron state for single impurity in a bosonic Mott insulator Yasuyuki Kato, K. A. Al-Hassanieh, A. E. Feiguin, Eddy Timmermans and C. D. Batista EPL, 98 4 (2012) 46003 Published online: 29 May 2012 DOI: 10.1209/0295-5075/98/46003