[Burgio, G. F.
; Lombardo, U.] Ist Nazl Fis Nucl, Lab Bazl Sud, Sez Catania, I-95123 Catania, Italy
; [Li, A.
; Burgio, G. F.
; Lombardo, U.] Dipartimento Fis & Astron, I-95125 Catania, Italy
; [Li, A.] Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China
; [Peng, G. X.] CAS, Inst High Energy Phys, Beijing 100049, Peoples R China
; [Peng, G. X.] CAS, Grad Univ, Dept Phys, Beijing 100049, Peoples R China
Article; Proceedings Paper
The appearance of exotic phases in neutron stars is studied. The possible transition from hadron to quark phase is studied within the density dependent mass quark model, and the kaon condensation within the Nelson and Kaplan model. In both cases a microscopic approach is adopted for dense hadron matter. From the study of the possible coexistence between the two phases it is found that the hybrid phase may strongly hinder the onset of kaon condensation.