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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220401T103000
DTEND;TZID=Europe/Paris:20220401T113000
DTSTAMP:20260405T105120
CREATED:20220620T163003Z
LAST-MODIFIED:20220620T163003Z
UID:7833-1648809000-1648812600@www.lapth.cnrs.fr
SUMMARY:Precision spectroscopy\, fundamental constants\, and new physics [Colloquium]
DESCRIPTION:High-resolution spectroscopy of the simplest atoms and molecules plays an important role in the determination of fundamental physical constants such as the Rydberg constant or the proton charge radius\, and may also be used to probe for hypothetical interactions beyond the standard model. As an introduction to this topic\, I will review recent work on the hydrogen and muonic hydrogen atoms\, which has led to (at least) partial resolution of the well-known ‘proton radius puzzle’. Then\, I will focus on a new player in the field of fundamental metrology\, namely the hydrogen molecular ion (H2+\, HD+)\, which is studied both experimentally and theoretically in our team.
URL:https://www.lapth.cnrs.fr/event/precision-spectroscopy-fundamental-constants-and-new-physics-colloquium/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220407T110000
DTEND;TZID=Europe/Paris:20220407T120000
DTSTAMP:20260405T105120
CREATED:20220620T163005Z
LAST-MODIFIED:20220620T163005Z
UID:7836-1649329200-1649332800@www.lapth.cnrs.fr
SUMMARY:Searching for axions in the sky and the lab
DESCRIPTION:Axion is a light particle arising in QCD as a solution to the strong CP problem and is considered to be one of the most promising dark matter candidate with interesting astrophysical and cosmological implications. At first\, I will outline the scheme and sensitivity of a novel radio probe\, axion gegenschein\, in which axion-like particles undergo stimulated decay into photons creating a countersource in a direction opposite to an astrophysical source. In the second part of the talk\, I will describe the design and sensitivity of the cutting-edge axion detector\, the Weakly Interacting Slender Particle detection with LC circuit (WISPLC)\, which will look for axion-like particles in a wide range of masses set to operate in broadband and resonant modes.Axion is a light particle arising in QCD as a solution to the strong CP problem and is considered to be one of the most promising dark matter candidate with interesting astrophysical and cosmological implications. At first\, I will outline the scheme and sensitivity of a novel radio probe\, axion gegenschein\, in which axion-like particles undergo stimulated decay into photons creating a countersource in a direction opposite to an astrophysical source. In the second part of the talk\, I will describe the design and sensitivity of the cutting-edge axion detector\, the Weakly Interacting Slender Particle detection with LC circuit (WISPLC)\, which will look for axion-like particles in a wide range of masses set to operate in broadband and resonant modes.
URL:https://www.lapth.cnrs.fr/event/searching-for-axions-in-the-sky-and-the-lab/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220412T110000
DTEND;TZID=Europe/Paris:20220412T120000
DTSTAMP:20260405T105120
CREATED:20220620T162951Z
LAST-MODIFIED:20220620T162951Z
UID:7803-1649761200-1649764800@www.lapth.cnrs.fr
SUMMARY:[Journal Club] About Long-Lived Particles
DESCRIPTION:Abstract: \n  \nZoom link: \nhttps://cnrs.zoom.us/j/91049381574?pwd=TDZyU3NqT0k4MFk3cUMvc0JuOURCdz09
URL:https://www.lapth.cnrs.fr/event/journal-club-about-long-lived-particles/
CATEGORIES:Upcoming Journal Club
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220421T110000
DTEND;TZID=Europe/Paris:20220421T120000
DTSTAMP:20260405T105120
CREATED:20220620T163003Z
LAST-MODIFIED:20220620T163003Z
UID:7832-1650538800-1650542400@www.lapth.cnrs.fr
SUMMARY:Berry phases\, wormholes and factorization in AdS/CFT [Remote talk]
DESCRIPTION:Within the AdS/CFT correspondence\, the entanglement properties of the\nCFT are related to wormholes in the dual gravity theory. This gives rise\nto questions about the factorisation properties of the Hilbert spaces on\nboth sides of the correspondence.  We review these issues and show how\nthe Berry phase\, a geometrical phase encoding information about\ntopology\, may be used to reveal similarities between the Hilbert space\nstructure  on both sides of the correspondence. Mathematical concepts\nsuch as coadjoint orbits play an important role. In addition to its\nrelevance for quantum gravity\, this analysis also suggests how to\nexperimentally realise the Berry phase and its relation to entanglement\nin table-top experiments involving photons or electrons. This provides a\nnew example for relations between very different branches of physics\nthat follow from the AdS/CFT correspondence and its generalisations.
URL:https://www.lapth.cnrs.fr/event/berry-phases-wormholes-and-factorization-in-ads-cft-remote-talk/
CATEGORIES:Weekly seminars
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