eprintid: 1086 rev_number: 18 eprint_status: archive userid: 6 dir: disk0/00/00/10/86 datestamp: 2012-01-26 14:19:40 lastmod: 2014-12-05 09:24:53 status_changed: 2012-01-26 14:19:40 type: article metadata_visibility: show creators_name: Gabrielli, Andrea creators_name: Caldarelli, Guido creators_id: creators_id: guido.caldarelli@imtlucca.it title: Invasion percolation and critical transient in the Barabási Model of human dynamics ispublished: pub subjects: QC subjects: QH divisions: EIC full_text_status: public keywords: PACS: 89.75.Da, 02.50.Le, 64.60.Ak, 89.65.Ef note: © 2007 American Physical Society abstract: We introduce an exact probabilistic description for L=2 of the Barabási model for the dynamics of a list of L tasks. This permits us to study the problem out of the stationary state and to solve explicitly the extremal limit case where a critical behavior for the waiting time distribution is observed. This behavior deviates at any finite time from that of the stationary state. We study also the characteristic relaxation time for finite time deviations from stationarity in all cases showing that it diverges in the extremal limit, confirming that these deviations are important at all time. date: 2007-05 date_type: published publication: Physical Review Letters volume: 98 number: 20 publisher: American Physical Society id_number: 10.1103/PhysRevLett.98.208701 refereed: TRUE issn: 0031-9007 official_url: http://dx.doi.org/10.1103/PhysRevLett.98.208701 related_url_url: http://arxiv.org/abs/physics/0702110 citation: Gabrielli, Andrea and Caldarelli, Guido Invasion percolation and critical transient in the Barabási Model of human dynamics. Physical Review Letters, 98 (20). ISSN 0031-9007 (2007) document_url: http://eprints.imtlucca.it/1086/1/Caldarelli_PRL_07.pdf