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SUMMARY:Fermion Condensate Inflation\, Dynamical Waterfall Mechanism and P
 rimordial Black Holes
DTSTART;VALUE=DATE-TIME:20260428T010000Z
DTEND;VALUE=DATE-TIME:20260428T020000Z
DTSTAMP;VALUE=DATE-TIME:20260429T101000Z
UID:indico-event-4973@indico-tdli.sjtu.edu.cn
DESCRIPTION:Speakers: Antonino Marciano (Fudan University and INFN Frascat
 i)\n\nAbstract: Fermion condensate inflation\, where inflation emerges fr
 om four-fermion interactions induced by spacetime torsion\, removes the ne
 ed for additional scalar fields beyond the Standard Model. In this framewo
 rk\, the fermion field can be decomposed into two distinguished sectors\, 
 each giving rise to bound states. After integrating out fermions\, the bou
 nd fields play the roles of the inflaton and the auxiliary fields\, resemb
 ling hybrid inflation with a waterfall mechanism. The inclusion of an axia
 l chemical potential naturally introduces a mechanism to end inflation and
  trigger instant preheating. During the waterfall phase\, the effective po
 tential of the fermion condensate supports the formation of non-topologica
 l solitons such as Q-balls\, which act as seeds of primordial black holes.
  This model is intrinsically connected to Chern-Simons gravity\, which imp
 lies a parity-violating universe. Consequently\, both the primordial black
  hole (PBH) dark-matter abundance and parity-violation signatures could pr
 ovide observational tests of the model. Biography:Antonino Marcianò is a
  tenured Full Professor in the Department of Physics at Fudan University a
 nd a member of the Italian National Institute for Nuclear Physics (INFN). 
 He joined the Fudan faculty in 2014\, where his research has focused on gr
 avitational-wave probes of the dark universe.Previously\, he held postdoct
 oral positions in the United States at Princeton University and Dartmouth 
 College\, working on models of cosmological inflation and the physics of t
 he cosmic microwave background\, as well as at Aix-Marseille University\, 
 where he contributed to the Wilson-loop approach to quantum gravity. His i
 nterest in quantum gravity — particularly in noncommutative geometry and
  quantum-group deformations of spacetime symmetries — originated during 
 his Ph.D. studies at Sapienza University of Rome.His research spans topolo
 gical and out-of-equilibrium quantum field theories\, with applications ac
 ross particle physics\, cosmology\, and astrophysics\, as well as interdis
 ciplinary directions including analogue gravity in artificial intelligence
 \, quantum computing\, and topological materials. He has authored more tha
 n 130 publications in leading international scientific journals.Prof. Marc
 ianò serves as a referee for journals of the American Physical Society\, 
 Nature\, and several Chinese and European journals. He is also an active r
 eviewer for major funding agencies\, including the National Natural Scienc
 e Foundation of China\, the Italian Ministry of University and Research\, 
 the Royal Swedish Academy of Sciences\, the Swiss National Science Foundat
 ion\, the Austrian Science Fund\, and the National Science Centre of Polan
 d\, contributing to the evaluation of tenure-track appointments and resear
 ch grant proposals. Online Link: Join Zoom Meetinghttps://umass-amherst.z
 oom.us/j/9432601370?pwd=V0d6dVUzT3NXaGxvWDBhekdhOFk5UT09&omn=93787572123Me
 eting ID: 943 260 1370Passcode: Saguaro\n\nhttps://indico-tdli.sjtu.edu.cn
 /event/4973/
URL:https://indico-tdli.sjtu.edu.cn/event/4973/
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