The Workshop, focused on application of mathematical methods in atomic and molecular sciences, intends to bring together scientists from different European countries for exchanging ideas and establishing, or continuing, collaborations. 15-16 July 2014 It will be held for two days on the 15th and 16th of July 2014 on the premises of BCAM in the center of Bilbao. The first day of its work will be dedicated largely to problems in quantum reactive scattering, with the second day covering a wider range of subjects, from mathematical physics to numerical modeling of polymerization processes. IV Workshop Quantum days in Bilbao Scientific Committee Organizing Committee Prof. Prof. Prof. Prof. D. Sokolovski (UPV/EHU & Ikerbasque, Bizkaia) ! E. Akhmatskaya (BCAM & Ikerbasque, Bizkaia)! S. Rusconi (BCAM, Bizkaia) ! C. Echeverria-Arrondo (UPV/EHU, Bizkaia) V. Aquilanti, (U. Perugia, Italy) ! J.N.L Connor, (U. Manchester, UK) ! M. Gonzalez Perez, (U. Barcelona, Spain)! L. Vega, (BCAM-UPV/EHU, Bizkaia)! Headquarters: BCAM - Alda Mazarredo, 14 48009, Bilbao Confirmed speakers Prof. Vincenzo Aquilanti (U. di Perugia, Italy) ! Prof. Jean-Bernard Bru (UPV/EHU & Ikerbasque, Bizkaia)! Dr. Javier Carrasco (CIC-enegiGUNE, Alava)! Prof. David Casanova (Ikerbasque &! Donostia International Physics Center (DIPC) & UPV/EHU)! Dr. Cecilia Coletti (U. di Chieti, Italy)! Prof. J.N.L Connor (U. Manchester, UK) ! Dr. Fabrizio Esposito (CNR, Bari, Italy)! Dr. Dario De Fazio, (CNR, Roma, Italy) ! Prof. Miguel Gonzalez (U. Barcelona, Spain)! Prof. M. Modugno (UPV/EHU & Ikerbasque, Bizkaia)! Prof. Carlo Petrongolo (U. Siena CNR, Italy)! Mr. Simone Rusconi (BCAM, Bizkaia)! Prof. Sokolovski (UPV/EHU & Ikerbasque, Bizkaia)! Prof. Luis Vega (BCAM & UPV/EHU, Bizkaia)