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X-WR-CALDESC:Veranstaltungen für QVLS | Quantum Valley Lower Saxony
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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241202T113000
DTEND;TZID=Europe/Berlin:20241202T123000
DTSTAMP:20260525T135353
CREATED:20241202T170413Z
LAST-MODIFIED:20241202T170413Z
UID:10002205-1733139000-1733142600@qvls.de
SUMMARY:Precise Orbit Determination for Geodetic\, Geophysical\, and Ionospheric Applications: Studies performed at AIUB for real CubeSat data and simulated Genesis data
DESCRIPTION:In presence and online: Guest lecture given by TerraQ Mercator Fellow\, Prof. Adrian Jäggi of the University of Bern\, \nRoom 404 of the Institut für Erdmessung (Schneiderberg 50\, 30167 Hannover) \nhttps://uni-hannover.webex.com/uni-hannover-en/j.php?MTID=m0837cfc3345a7fb12c948335c890e4f6
URL:https://qvls.de/event/precise-orbit-determination-for-geodetic-geophysical-and-ionospheric-applications-studies-performed-at-aiub-for-real-cubesat-data-and-simulated-genesis-data/
LOCATION:Niedersachsen
CATEGORIES:Bildung
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241202T143000
DTEND;TZID=Europe/Berlin:20241202T153000
DTSTAMP:20260525T135353
CREATED:20241202T171120Z
LAST-MODIFIED:20241202T171120Z
UID:10002207-1733149800-1733153400@qvls.de
SUMMARY:An Introduction to Causal Fermion Systems with a focus on information theoretic aspects
DESCRIPTION:Dr. Claudio Paganini from the faculty of mathematics of the university of Regensburg: \n„I will give an introduction to Causal Fermion Systems (CFS)\, a leading candidate for a unified theory of physics. \nCFS provides a rigorous mathematical framework that merges the language of Quantum Theory and General Relativity in a novel way. This is achieved by encoding all the properties of our physical world in the texture of correlations between the fundamental (fermionic) degrees of freedom. \nThe systematic study of spacetime correlations enables an identification of points in a classical spacetime with elements in an operator manifold. The causal structure as well as the physical principles  governing the dynamics in the theory are recovered from the eigenvalues of these operators. On the level of an effective description of our reality in terms of established theories\, CFS gives rise to the emergence of the (causal) structure of spacetime and is at the origin of  the fundamental interactions of the standard model of particle physics. \nThe goal is to provide you with a qualitative understanding of how CFS encodes a physical system in terms of the two point correlation. I will also provide a sketch for a novel proposal for observables in CFS and how this might lead us to a full ontology for the theory.“ \nThe talk will be hybrid: it will take place at ZARM in meeting room 1280 and one can join online via Zoom\nhttps://uni-bremen.zoom.us/j/4651981280\nID: 465 198 1280\nPW: gravi
URL:https://qvls.de/event/an-introduction-to-causal-fermion-systems-with-a-focus-on-information-theoretic-aspects/
LOCATION:Niedersachsen
CATEGORIES:Bildung
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241205T160000
DTEND;TZID=Europe/Berlin:20241205T173000
DTSTAMP:20260525T135353
CREATED:20241202T170736Z
LAST-MODIFIED:20241202T170825Z
UID:10002206-1733414400-1733419800@qvls.de
SUMMARY:Colloquium: Magic-band Floquet-Bloch Atom Interferometry
DESCRIPTION:For DQ-mat members and interested scientists: Colloquium by Prof. Dr. David Weld\, University of California\, Santa Barbara\, USA \nAbstract: „I will discuss a novel platform for compact\, continuously-trapped atom interferometry using lithium Bose condensates in the Floquet-Bloch bands of an amplitude-modulated optical lattice. In analogy to the magic wavelengths employed by optical lattice clocks\, we theoretically identify and experimentally realize magic band structures for which the interferometric phase is insensitive to noise in the trapping lattice intensity. Time permitting\, I will also touch on related experiments in driven quantum matter\, probing phenomena ranging from kicked quasicrystals to quantum chaos and interactive dynamics.“ \nAccess data for the transfer:\nZoom Access: https://us04web.zoom.us/j/932734874 \nThis talk is part of the „Virtual Seminar on Precision Physics and Fundamental Symmetries“ series and of the SFB DQ-mat colloquium series:\nhttps://indico.cern.ch/category/12183/
URL:https://qvls.de/event/colloquium-magic-band-floquet-bloch-atom-interferometry/
LOCATION:Niedersachsen
CATEGORIES:Bildung
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241209T143000
DTEND;TZID=Europe/Berlin:20241209T153000
DTSTAMP:20260525T135353
CREATED:20241206T161039Z
LAST-MODIFIED:20241206T161039Z
UID:10002210-1733754600-1733758200@qvls.de
SUMMARY:Non-linear media in weakly curved spacetime (via Zoom)
DESCRIPTION:Seminar by Dr. Alessio Belenchia from DLR (German Aerospace Center) Institute of Quantum Technologies\, Ulm. \nThat light propagating in a gravitational field gets frequency-shifted is one of the basic consequences of any metric theory of gravity rooted in the equivalence principle. At the same time\, also a time-dependent material’s refractive index can frequency-shift light propagating in it. \nIn this talk\, we analyse light propagation in non-linear media in curved spacetime and the presence of a moving refractive index perturbation. We show that this can lead to a gravity-dependent blueshift. The predicted blueshift surpasses the gravitational redshift even if the medium is considered to be perfectly stiff. In realistic scenarios\, strong frequency shifts arise due to the deformation of the dielectric medium and the corresponding photoelastic change of refractive index. \nThe talk will be streamed online via Zoom \nhttps://uni-bremen.zoom.us/j/4651981280 \nID: 465 198 1280 \nPW: gravi
URL:https://qvls.de/event/non-linear-media-in-weakly-curved-spacetime-via-zoom/
LOCATION:Niedersachsen
CATEGORIES:Bildung
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241212T160000
DTEND;TZID=Europe/Berlin:20241212T173000
DTSTAMP:20260525T135353
CREATED:20241211T094757Z
LAST-MODIFIED:20241211T094757Z
UID:10002214-1734019200-1734024600@qvls.de
SUMMARY:Enhancing the Performance of an Optical Lattice Clock with Multiple Atomic Ensembles
DESCRIPTION:16:00-17:30 Colloquium by Prof. Dr. Shimon Kolkowitz\, University of California\, Berkeley\, USA \nLocation: PTB Braunschweig\, Kohlrausch Building\, Lecture Hall \nAbstract: The remarkable precision of optical atomic clocks enables new applications and offers sensitivity to novel and exotic physics. In this talk I will explain the motivation and operating principles of a multiplexed strontium optical lattice clock\, which consists of two or more atomic ensembles of trapped\, ultra-cold strontium in one vacuum chamber. This miniature clock network enables us to bypass the primary limitations to typical atomic clock comparisons and achieve new levels of precision. \n„I will present recent experimental results in which we make use of multiple atomic ensembles to perform enhanced phase estimation and demonstrate a reduced absolute instability of an optical lattice clock. I will also briefly present the results of a blinded\, laboratory-based precision test of the gravitational redshift at the millimeter to centimeter scale. And finally\, I will discuss recent measurements of the radiative decay rate of the 3P0 – 1S0 optical clock transition in strontium-87\, and prospects for leveraging the level structure of strontium to convert depolarization errors into erasure errors and thereby enhance the performance of differential clock comparisons.“ \nAccess data for the transfer: \nZoom Access: https://us04web.zoom.us/j/932734874 \nThis talk is part of the „Virtual Seminar on Precision Physics and Fundamental Symmetries“ series and of the SFB DQ-mat colloquium series:\nhttps://indico.cern.ch/category/12183/
URL:https://qvls.de/event/enhancing-the-performance-of-an-optical-lattice-clock-with-multiple-atomic-ensembles/
LOCATION:Niedersachsen
CATEGORIES:Bildung
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