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DTSTART;TZID=Europe/Paris:20220104T140000
DTEND;TZID=Europe/Paris:20220104T153000
DTSTAMP:20260425T014051
CREATED:20220103T080058Z
LAST-MODIFIED:20220106T091406Z
UID:7615-1641304800-1641310200@fermi.univ-tlse3.fr
SUMMARY:Some approaches to the Lieb-Liniger model at strong coupling (Etienne Granet/ LPT / Seminar). – 4/01\, 14H.
DESCRIPTION:Etienne Granet (Centre Kadanoff de physique théorique\, l’Université de Chicago) \nI will present two approaches to compute in- and out-of-equilibrium correlations in the Lieb-Liniger model at strong coupling. The first approach relies on a strong-weak and boson-fermion duality that is made manifest with a certain regularization of point-like interactions between fermions in quantum mechanics. The second approach consists in performing a strong-coupling expansion of form factors summations (Lehmann representation). \n\nVisio
URL:https://fermi.univ-tlse3.fr/event/some-approaches-to-the-lieb-liniger-model-at-strong-coupling-etienne-granet-lpt-seminar-4-01-14h/
LOCATION:Visio
CATEGORIES:Events,LPT,Seminars
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220105T113000
DTEND;TZID=Europe/Paris:20220105T130000
DTSTAMP:20260425T014051
CREATED:20220104T090928Z
LAST-MODIFIED:20220106T091320Z
UID:7719-1641382200-1641387600@fermi.univ-tlse3.fr
SUMMARY:Higher-order topological insulators and superconductors and beyond (Luka Trifunovic / LPT / Seminar). – 5/01\, 11H30
DESCRIPTION:Luka Trifunovic (Université de Zurich) \nNot so long ago\, the concept of higher-order topological insulators and superconductors was mentioned for the first time in print (see Viewpoint [1]). Since then\, the concept of higher-order topology has been recognized to be key for the description of boundary phenomenology of topological crystalline insulators and superconductors. \nAlthough higher-order boundary phenomenology can exist without a topologically nontrivial bulk band structure\, recent excitement stems from the observation that it can also be a consequence of (and protected by) nontrivial bulk topology if additional crystalline symmetries are present. In this picture\, higher-order topological phases are not a new kind of topological phases\, rather they are a new type of boundary manifestation of nontrivial bulk topology. \nIn this talk\, I will introduce extrinsic and intrinsic higher-order boundary phenomenology and discuss both bulk and boundary topological classification. A new type of bulk-boundary correspondence that naturally includes a higher-order boundary phenomenology will be also discussed [2]. \n[1] https://physics.aps.org/articles/v10/132 \n[2] L Trifunovic\, PW Brouwer\, physica status solidi (b) 258 (1)\, 2000090 (2021) \n\nVisio
URL:https://fermi.univ-tlse3.fr/event/higher-order-topological-insulators-and-superconductors-and-beyond-luka-trifunovic-lpt-seminar-5-01-11h30/
LOCATION:Visio
CATEGORIES:Events,LPT,Seminars
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220111T140000
DTEND;TZID=Europe/Paris:20220111T153000
DTSTAMP:20260425T014051
CREATED:20220102T110004Z
LAST-MODIFIED:20220112T143613Z
UID:7542-1641909600-1641915000@fermi.univ-tlse3.fr
SUMMARY:Etats comprimés de spin pour la métrologie (Alice Sinatra / LPT / Seminar). - 11/01\, 14 H.
DESCRIPTION:Alice Sinatra (LKB\, ENS) \nLa compression de spin est une « technologie quantique » bien établie\, où des corrélations judicieusement créées dans un ensemble d’atomes réduisent l’incertitude statistique des expériences spectroscopiques. Dans la première partie de l’exposé\, nous donnerons un aperçu des avancées importantes dans ce domaine\, en soulignant les limites fondamentales imposées par la décohérence [1]. Dans la deuxième partie\, nous présenterons brièvement un schéma de compression de spin avec des condensats de Bose-Einstein\, qui permet de figer les corrélations quantiques d’un état comprimé de spin [2] ou d’un état GHZ [3] dans un réseau optique\, les atomes étant en configuration d’isolant de Mott. \n[1] A. Sinatra\, Spin-squeezed states for metrology\, hal-03508213. \n[2] D. Kajtoch\, E. Witkowska\, A. Sinatra\, Spin-squeezed atomic crystal Europhys. Lett 123\, 20012 (2018). \n[3] M. Plodzien\, M. Koscielski\, E. Witkowska\, A. Sinatra\, Producing and storing spin-squeezed states and Greenberger-Horne-Zeilinger states in a one-dimensional optical lattice\, Phys. Rev. A 102\, 013328 (2020) (Editors choice). \n\nVisio
URL:https://fermi.univ-tlse3.fr/event/tba-alice-sinatra-lpt-seminar-11-01-14-h/
LOCATION:Visio
CATEGORIES:Events,LPT,Seminars
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220118T140000
DTEND;TZID=Europe/Paris:20220118T153000
DTSTAMP:20260425T014051
CREATED:20220114T080038Z
LAST-MODIFIED:20220119T084114Z
UID:7848-1642514400-1642519800@fermi.univ-tlse3.fr
SUMMARY:Entanglement of skeletal regions (Clément Berthiere / LPT / Seminar). - 18/01\, 14 H.
DESCRIPTION:Clément Berthiere (Université de Montréal) \n\nVisio
URL:https://fermi.univ-tlse3.fr/event/entanglement-of-skeletal-regions-clement-berthiere-lpt-seminar-18-01-14-h/
LOCATION:Visio
CATEGORIES:Events,LPT,Seminars
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