BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//wp-events-plugin.com//6.4.7.2//EN
TZID:Europe/Paris
X-WR-TIMEZONE:Europe/Paris
BEGIN:VEVENT
UID:0-835@lptms.universite-paris-saclay.fr
DTSTART:20221108T100000Z
DTEND:20221108T100000Z
DTSTAMP:20221103T105927Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/soutenance-de-the
 se-lorenzo-gotta-lptms/
SUMMARY:Soutenance de thèse : Lorenzo Gotta (LPTMS) - Petit amphi\, bâtim
 ent Pascal n° 530 - 8 Nov 22 10:00
DESCRIPTION:Pairing and two-fluid physics in low-dimensional quantum system
 s\npar\n\nLorenzo Gotta\nThe present thesis deals mainly with the ground-s
 tate properties of quantum many-body systems of spinless fermions that dis
 play bound-state formation. We start by discussing the pairing phenomena i
 nduced by density-density interactions\, showing that extending the range 
 of the latter can lead to the observation of exotic Luttinger liquid phase
 s with cluster granularity. We continue the study of pairing in a one-dime
 nsional chain of spinless fermions where single-particle hopping competes 
 with a correlated pair-hopping interaction. We unveil a novel transition f
 rom a weak-coupling Luttinger liquid phase to a paired Luttinger liquid ph
 ase\, that occurs through an intervening phase where a liquid of isolated 
 fermions coexists with a liquid of pairs without phase separation. We conf
 i\\u001Crm the stability of this novel coexistence phase against the addit
 ion of a weak nearest-neighbor density-density interaction\, which is show
 n to induce instead phase separation between paired and unpaired fermions 
 in the strong-coupling regime. Finally\, we generalize the pair-hopping te
 rm to a generic multimer-hopping term\, thereby proving the robustness of 
 the coexistence phase as the generic transition scenario between a Lutting
 er liquid with single-particle granularity and one with molecular granular
 ity. We conclude by showing that models of spinless fermions featuring pai
 r-hopping can host quantum many-body scars\, thus opening further routes t
 owards the study of weak ergodicity breaking in isolated many-body quantum
  systems.\n\n&nbsp\;\n\nJury:\n\nL. Mazza (co-directeur de thèse)\n\nG. R
 oux (co-directeur de thèse)\n\nP. Simone (co-directeur de thèse)\n\nK. L
 e Hur\n\nG. Pupillo\n\nJ. Ruhman\n\nO. Zilberberg
CATEGORIES:seminars
LOCATION:Petit amphi\, bâtiment Pascal n° 530\, rue André Rivière\, Ors
 ay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Rivière\, Orsay
 \, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Petit amphi\, bâtiment Pasca
 l n° 530:geo:0,0
END:VEVENT
END:VCALENDAR