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X-WR-CALDESC:Events for INPA
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TZID:America/Los_Angeles
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TZOFFSETFROM:-0800
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DTSTART:20260308T100000
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DTSTART:20261101T090000
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260508T120000
DTEND;TZID=America/Los_Angeles:20260508T130000
DTSTAMP:20260506T042011
CREATED:20260128T234227Z
LAST-MODIFIED:20260504T153904Z
UID:2199-1778241600-1778245200@inpa.lbl.gov
SUMMARY:INPA Seminar Speaker: Lorenzo Magrini (Stanford)-Title: A search for short-range new interactions with Mössbauer spectroscopy
DESCRIPTION:Date: May 8\, 2026 \nTime: 12:00 pm – 1:00 pm \nLocation: Sessler Conference Room – 50A-5132 [Hybrid and In-Person] \nSpeaker: Lorenzo Magrini (Stanford) \nTitle: A search for short-range new interactions with Mössbauer spectroscopy \nAbstract: New light particles\, predicted by many proposed extensions of the Standard Model\, would manifest as short-range forces between matter. At the nanoscale\, electromagnetism is overwhelming\, masking anything weaker. Nuclei\, on the other hand\, sit shielded inside their electron cloud — making them an exceptionally clean place to look. The recoilless 14.4 keV transition in ⁵⁷Fe gives access to this channel with a natural linewidth of ~5 × 10⁻⁹ eV!\nI will present an ongoing experiment at Stanford that uses this resonance to probe new interactions between nuclei in the 20–400 nm range. A ⁵⁷Co source illuminates a thin ⁵⁷Fe absorber\, while a gold source mass in close proximity would shift the resonance line through the new interaction. I will discuss the design\, the systematics that set the ultimate reach\, and what we hope to see. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95016696011?pwd=Tk1XOW1Xd3RYRnlsc2tEYmRWZlVVZz09 \nMeeting ID: 950 1669 6011 \nPasscode: 247722
URL:https://inpa.lbl.gov/event/inpa-seminar-speaker-tbd-6/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260515T120000
DTEND;TZID=America/Los_Angeles:20260515T130000
DTSTAMP:20260506T042011
CREATED:20260128T234406Z
LAST-MODIFIED:20260504T154843Z
UID:2201-1778846400-1778850000@inpa.lbl.gov
SUMMARY:NO INPA Seminar
DESCRIPTION:
URL:https://inpa.lbl.gov/event/inpa-seminar-speaker-tbd-7/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260522T120000
DTEND;TZID=America/Los_Angeles:20260522T130000
DTSTAMP:20260506T042011
CREATED:20260128T234536Z
LAST-MODIFIED:20260504T155319Z
UID:2203-1779451200-1779454800@inpa.lbl.gov
SUMMARY:INPA Seminar Speaker: Jacob Robnik (UC Berkeley)-Title: Feasible MCMC in high-dimensional parameter spaces
DESCRIPTION:Date: May 22\, 2026 \nTime: 12:00 pm – 1:00 pm \nLocation: Sessler Conference Room – 50A-5132 [Hybrid and In-Person] \nSpeaker: Jacob Robnik (UC Berkeley) \nTitle: Feasible MCMC in high-dimensional parameter spaces \nAbstract: Statistical inference increasingly takes place in high-dimensional parameter spaces (thousands to billions of parameters) and is commonly the computational bottleneck of scientific workflow. To make this task scalable we have developed Microcanonical Langevin Monte Carlo (MCLMC)\, which is the first ever out-of-the-box MCMC algorithm without Metropolis adjustment. Avoiding the adjustment gives it superior scaling with the dimensionality of the problem\, while still maintaining error guarantees. MCLMC outperforms current state-of-the-art samplers like the No-U-Turn Sampler (NUTS) on all of the problems we considered. For example\, for cosmological field level inference from galaxy surveys with 2 million parameters\, MCLMC inference takes 4 hours while NUTS needs more than 3 days for the same accuracy and computational resources. The gains are growing further as the dimensionality increases. This kind of improvement can lead to scientific breakthroughs\, for example by enabling optimal information extraction or by enabling the study of solid state systems of unprecedented size. In the talk I will give intuition about how scalable MCMC must work in high dimensions and then introduce MCLMC. I will show practical applications to benchmarks\, lattice field theories\, cosmological field level inference and Bayesian neural networks. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95016696011?pwd=Tk1XOW1Xd3RYRnlsc2tEYmRWZlVVZz09 \nMeeting ID: 950 1669 6011 \nPasscode: 247722
URL:https://inpa.lbl.gov/event/inpa-seminar-speaker-tbd-8/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260529T120000
DTEND;TZID=America/Los_Angeles:20260529T130000
DTSTAMP:20260506T042011
CREATED:20260128T234759Z
LAST-MODIFIED:20260128T234901Z
UID:2205-1780056000-1780059600@inpa.lbl.gov
SUMMARY:INPA Seminar Speaker: TBD
DESCRIPTION:Date: May 29\, 2026 \nTime: 12:00 pm – 1:00 pm \nLocation: Sessler Conference Room – 50A-5132 [Hybrid and In-Person] \nSpeaker: TBD \nTitle: TBD \nAbstract: TBD \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95016696011?pwd=Tk1XOW1Xd3RYRnlsc2tEYmRWZlVVZz09 \nMeeting ID: 950 1669 6011 \nPasscode: 247722
URL:https://inpa.lbl.gov/event/inpa-seminar-speaker-tbd-9/
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