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X-WR-CALDESC:Events for LBNL Physics Division Research Progress Meetings
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DTSTART:20260101T000000
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DTSTART;TZID=UTC:20260507T160000
DTEND;TZID=UTC:20260507T170000
DTSTAMP:20260525T144000
CREATED:20260430T181542Z
LAST-MODIFIED:20260430T181542Z
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SUMMARY:Speaker: Jo Dunkley (Princeton) - Title: Cosmology from the Cosmic Microwave Background
DESCRIPTION:Research Progress Meeting \nDate: May 7\, 2026 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Jo Dunkley (Princeton) \nTitle: Cosmology from the Cosmic Microwave Background\n \nAbstract: The cosmic microwave background (CMB) is our earliest image of the universe. I will review what our current observations have told us about the current model for the universe. I will then talk about science plans for the Simons Observatory\, a new millimeter-wave observatory in Chile which has substantial Berkeley involvement. With its smaller telescopes we are seeking a signal imprinted by gravitational waves generated in the early universe. Its largest telescope will measure the finer scales of the CMB with increased sensitivity\, probing the initial conditions of the early universe as well as revealing the later-formed cosmic web of gas and dark matter. I will describe SO’s current status and show some early data. \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09 \nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-jo-dunkley-princeton-title-cosmology-from-the-cosmic-microwave-background/
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BEGIN:VEVENT
DTSTART;TZID=UTC:20260514T160000
DTEND;TZID=UTC:20260514T170000
DTSTAMP:20260525T144000
CREATED:20260508T184344Z
LAST-MODIFIED:20260508T184344Z
UID:3135-1778774400-1778778000@rpm.physics.lbl.gov
SUMMARY:Speaker: Emanuele Castorina (University of Milan) - Title: Probing the nature of Dark Matter with the Large Scale Structure of the Universe
DESCRIPTION:Research Progress Meeting \nDate: May 14\, 2026 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Emanuele Castorina (University of Milan) \nTitle: Probing the nature of Dark Matter with the Large Scale Structure of the Universe \nAbstract: In the standard cosmological model\, the main non-baryonic component is defined by its acronym: Cold Dark Matter (CDM). In this talk I will show how measurements of the clustering of galaxies on scales larger than roughly 10 Mpc can place leading constraints on the physical properties behind each one of the acronym’s letters\, provided non-linearities in the matter distribution due to new physics are properly modeled via effective theories. Worked out examples will include ultra-light axions\, strong kinetic coupling at late times\, and tests of the equivalence principle in the dark sector. \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09 \nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-emanuele-castorina-university-of-milan-title-probing-the-nature-of-dark-matter-with-the-large-scale-structure-of-the-universe/
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BEGIN:VEVENT
DTSTART;TZID=UTC:20260528T160000
DTEND;TZID=UTC:20260528T170000
DTSTAMP:20260525T144000
CREATED:20260518T184645Z
LAST-MODIFIED:20260518T184645Z
UID:3140-1779984000-1779987600@rpm.physics.lbl.gov
SUMMARY:Speaker: Chelsea Bartram (Stanford) - Title: Dialing into the Dark Matter with Novel Quantum Techniques
DESCRIPTION:Research Progress Meeting \nDate: May 28\, 2026 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Chelsea Bartram (Stanford) \nTitle: Dialing into the Dark Matter with Novel Quantum Techniques \nAbstract: The QCD axion is a well-motivated dark matter candidate that could solve the strong CP problem. The axion haloscope\, which leverages the inverse Primakoff effect\, renders the QCD axion ‘visible’ — if it exists. Still\, finding the QCD axion is no trivial matter. The QCD axion could span up to 13 orders of magnitude in mass space. Searches at higher masses suffer from the problem of scaling the detectors to smaller volumes\, and thus\, smaller signal powers. Searches at lower masses suffer from the need to achieve sensitivity to much smaller axion-photon couplings. I will discuss major efforts to cover the axion parameter space\, including the Axion Dark Matter eXperiment (ADMX) and DMRadio searches. Further\, I will explain some proposed enabling technologies for accelerated searches. It is clear new direct detection techniques are needed to cover such an expansive parameter space. In this talk\, I present a novel technique for improved impedance matching to wave-like dark matter. It is known that an RLC resonator is well-suited to axion direct detection. We propose an alternative circuit that replaces the capacitance with a ‘negative inductance’ to cancel reactance over a wider range of frequencies. Using the unique properties of a Josephson junction\, we show that we can achieve broadband reactance cancellation via simulation. I will discuss our preliminary understanding of the stability and operation of the circuit. To our knowledge\, this circuit represents the first implementation of a Josephson junction in a non-Foster circuit\, which uses an active component to evade the Bode-Fano limits on the bandwidth of a match. The Josephson junction must be operated in a cryogenic environment; thus\, its implementation in a non-Foster circuit is well-suited for axion searches that require low physical temperatures. \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09 \nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-chelsea-bartram-stanford-title-dialing-into-the-dark-matter-with-novel-quantum-techniques/
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