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X-WR-CALDESC:Évènements pour LAPTh
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DTSTART:20220101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20230509T090000
DTEND;TZID=UTC:20230509T100000
DTSTAMP:20260407T074515
CREATED:20230509T132132Z
LAST-MODIFIED:20230509T132132Z
UID:8210-1683622800-1683626400@www.lapth.cnrs.fr
SUMMARY:News from the Universe: A Trio of Intriguing Developments in Astrophysics and Cosmology
DESCRIPTION:Speakers: Christopher Eckner (CNRS\, LAPTh) \n Abstract:I will present three recent papers advancing our understanding of astrophysics and cosmology. The covered papers are:I)  arXiv:2304.0607: « The Image of the M87 Black Hole Reconstructed with PRIMO »   A crisper image of the supermassive black hole of M87 with machine learningII)  arXiv:2304.09895: « Anomalies in Gravitational-Lensed Images Revealing Einstein Rings Modulated by Wavelike Dark Matter »   Using strong gravitational lensing to discriminate between fuzzy and WIMP-like dark matter III) arXiv:2304.10934: « A Cross-correlation Study between IceCube Neutrino Events and the Fermi Unresolved Gamma-ray Sky »    Where do all the very-high-energy neutrinos detected by IceCube come from?  \nhttps://indico.in2p3.fr/event/29748/
URL:https://www.lapth.cnrs.fr/event/news-from-the-universe-a-trio-of-intriguing-developments-in-astrophysics-and-cosmology/
LOCATION:Auditorium (LAPTh)
CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20230511T090000
DTEND;TZID=UTC:20230511T100000
DTSTAMP:20260407T074515
CREATED:20230509T132133Z
LAST-MODIFIED:20230509T132133Z
UID:8211-1683795600-1683799200@www.lapth.cnrs.fr
SUMMARY:DM indirect searches with cosmic-ray antiparticles
DESCRIPTION:Speakers: Pedro de la Torre Luque (Stockholm University) \nThe creation of antiparticles in the Galaxy has been discussed as a potential signal of exotic production mechanisms such as primordial black hole evaporation or dark matter decay/annihilation\, in addition to the more conventional production from cosmic-ray (CR) interactions. Recent CR detectors have provided very accurate measurements on the spectra of antiprotons and positrons that we use to search for evidence of new physics. In addition\, the exciting first measurements of the flux of anti-nuclei can be achievable in a few years.In this talk\, I discuss the uncertainties related to the modelling of these antiparticles and show state-of-art predictions of their spectra. We will also talk about recent dark matter constraints from antiprotons and positrons and discuss the expected fluxes of anti-deuteron and anti-helium from global analyses of different CR observables in view of the first tentative detection of anti-nuclei events by the AMS-02 collaboration. Finally\, if time allows it\, I will discuss an ongoing study where we use CR data to place constrains of DM candidates beyond WIMPs (e.g. ALPs\, sterile neutrinos\, …) coupling with electrons. \nhttps://indico.in2p3.fr/event/29312/
URL:https://www.lapth.cnrs.fr/event/dm-indirect-searches-with-cosmic-ray-antiparticles/
LOCATION:Auditorium (LAPTh)
CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20230516T120000
DTEND;TZID=UTC:20230516T130000
DTSTAMP:20260407T074515
CREATED:20230509T132134Z
LAST-MODIFIED:20230509T132134Z
UID:8212-1684238400-1684242000@www.lapth.cnrs.fr
SUMMARY:Entanglement and separability of Rokhsar-Kivelson and resonating valence-bond states
DESCRIPTION:Speakers: Gilles Parez (CRM\, Montréal) \nEntanglement and separability are two opposite yet intertwined notions in quantum mechanics. A quantum state is said to be entangled if it is not separable\, and vice versa. Quantifying how entangled two subsystems are remains a challenging problem\, which has led to important insights in the context of quantum many-body systems. In this talk\, I will discuss entanglement and separability of dimer Rokhsar-Kivelson (RK) states and resonating valence-bond (RVB) states. For dimer RK states on general tilable graphs\, we prove the exact separability of the reduced density matrix of two or more disconnected subsystems\, implying the absence of entanglement between the subsystems. For RVB states\, we show separability for disconnected systems up to exponentially small terms in the distance d between the subsystems. We argue that separability does hold in the scaling limit\, even for arbitrarily small ratio d/L\, where L is the characteristic size of the subsystems. Our results hold irrespective of the underlying graph (which include square and triangular lattices)\, and hence suggest that separability (up to exponentially small terms) between disjoint regions is a universal feature of RVB states. In the case of adjacent subsystems for the RK states\, we derive exact results for the logarithmic negativity in terms of partition functions of the underlying statistical model\, and recover the known result for the Rényi-1/2 entropy in the limit of complementary subsystems. \nhttps://indico.in2p3.fr/event/29487/
URL:https://www.lapth.cnrs.fr/event/entanglement-and-separability-of-rokhsar-kivelson-and-resonating-valence-bond-states/
LOCATION:Auditorium (LAPTh)
CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20230517T140000
DTEND;TZID=UTC:20230517T150000
DTSTAMP:20260407T074515
CREATED:20230509T132135Z
LAST-MODIFIED:20230509T132135Z
UID:8214-1684332000-1684335600@www.lapth.cnrs.fr
SUMMARY:[AnLy] Gerben Venken
DESCRIPTION:Speakers: Gerben Venken (U. Heidelberg) \n Abstract: Link: ZoomAnLy: https://sites.google.com/view/anlystringsandfields   \nhttps://indico.in2p3.fr/event/29869/
URL:https://www.lapth.cnrs.fr/event/anly-gerben-venken/
LOCATION:Online seminar
CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20230523T100000
DTEND;TZID=UTC:20230525T150000
DTSTAMP:20260407T074515
CREATED:20230509T132136Z
LAST-MODIFIED:20230509T132136Z
UID:8216-1684836000-1685026800@www.lapth.cnrs.fr
SUMMARY:French Strings Meeting 2023
DESCRIPTION:This meeting will gather the France-based community working in string and quantum field theory for three days of scientific exchanges on current developments in these research areas. The workshop will take place at LAPTh\, Annecy\, from Tuesday 23rd May at 2pm till Thursday 25th at around 2pm. The detailed program can be found here. Talks are by invitation. Review talks will be given by:Yifei He (LPENS\, Paris)Severin Lüst (L2C\, Montpellier)Eric Perlmutter (IPhT\, Saclay)Speakers list:Nejc Ceplak (IPhT\, Saclay)Yegor Goncharov (IDP\, Tours)Nafiz Ishtiaque (IHES\, Bures-sur-Yvette)Taro Kimura (IMB\, Dijon)Bruno Le Floch (LPTHE\, Paris)Sucheta Majumdar (LPENS\, Lyon)Paul Marconnet (IP2I\, Lyon)Blagoje Oblak (CPhT\, Palaiseau)Valentin Reys (IPhT\, Saclay)Mikel Sanchez-Garitaonandia (CPhT\, Palaiseau)George Tringas (LAPTh\, Annecy)Alexander Tumanov (LPENS\, Paris)This meeting is an activity of IRN:QFS\, the International Research Network on Quantum Fields and Strings. Previous editions of similar workshops include:French kick-off meeting of IRN:QFS (Tours\, 2021)Théorie des Cordes en France (Paris\, 2015) Registration:  can be done here. It will close on April 23rd. In case of high attendance\, preference will be given to the members of institutes covered by the network IRN:QFS in France. Accommodation:  will be covered by the IRN:QFS network for 2 nights (23-25/05)\, in the limit of 50 participants. The hotel is Best Western International\, 19 avenue du Rhône\, Annecy. Travel: Annecy can be reached by train (SNCF)\, bus (Flixbus) or car (including car-sharing Blablacar). Detailed information on how to access the LAPTh can be found on this page. Buses connecting the station and the LAPTh are indicated. Travel costs are to be covered by participants. Lunch and Dinner: Lunches\, as well as a workshop dinner\, will be offered. Lunches will be provided at LAPTh. The workshop dinner will take place at the Brasserie de l’Impérial. To reach the dinner restaurant as a group\, we will leave LAPTh and catch the Bus 1 at Campus\, stop at Montremont and walk along Avenue de France. Organizing Committee:  David Andriot\, Benjamin Basso\, Xavier Bekaert\, Dmitrii Chicherin\, Laurent Gallot\, Ruben Minasian\, Boris Pioline\, Andrea Puhm\, Henning Samtleben\, Piotr Tourkine. Funding: IRN:QFS\, LAPTh\, FRIF\, CPTGA \nhttps://indico.in2p3.fr/event/28620/
URL:https://www.lapth.cnrs.fr/event/french-strings-meeting-2023/
LOCATION:LAPTh
CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20230530T090000
DTEND;TZID=UTC:20230530T100000
DTSTAMP:20260407T074515
CREATED:20230509T132138Z
LAST-MODIFIED:20230509T132138Z
UID:8218-1685437200-1685440800@www.lapth.cnrs.fr
SUMMARY:[Journal Club] Pasquale Serpico
DESCRIPTION:Speakers: Pasquale Serpico (LAPTh\, Annecy-le-vieux) \n Abstract:  \nhttps://indico.in2p3.fr/event/29749/
URL:https://www.lapth.cnrs.fr/event/journal-club-pasquale-serpico/
LOCATION:Petit Amphi (LAPTh)
CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20230531T140000
DTEND;TZID=UTC:20230531T150000
DTSTAMP:20260407T074515
CREATED:20230509T132139Z
LAST-MODIFIED:20230509T132139Z
UID:8219-1685541600-1685545200@www.lapth.cnrs.fr
SUMMARY:[AnLy] Solving 3d Gravity with Virasoro TQFT
DESCRIPTION:Speakers: Lorenz Eberhardt (Princeton\, IAS) \nAbstract: I will explain a proposal which relates three-dimensional quantum gravity in AdS3 to a particular 3d TQFT that we refer to as « Virasoro TQFT’’. This relation gives a precise meaning to the standard folklore that pure 3d gravity is related to two copies of SL(2\,R) Chern-Simons theory. I will discuss that replacing SL(2\,R) Chern-Simons theory by Virasoro TQFT solves several known problems in the correspondence. The relation provides a computationally useful tool to study partition functions of 3d gravity. The talk is based on work with Scott Collier and Mengyang Zhang.Link: ZoomAnLy: https://sites.google.com/view/anlystringsandfields   \nhttps://indico.in2p3.fr/event/30080/
URL:https://www.lapth.cnrs.fr/event/anly-solving-3d-gravity-with-virasoro-tqft/
LOCATION:Online seminar
CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars
END:VEVENT
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