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PRODID:-//LBNL Physics Division Research Progress Meetings - ECPv6.8.3//NONSGML v1.0//EN
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X-WR-CALNAME:LBNL Physics Division Research Progress Meetings
X-ORIGINAL-URL:https://rpm.physics.lbl.gov
X-WR-CALDESC:Events for LBNL Physics Division Research Progress Meetings
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TZID:UTC
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DTSTART:20250101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20251002T160000
DTEND;TZID=UTC:20251002T170000
DTSTAMP:20260414T213910
CREATED:20250919T213846Z
LAST-MODIFIED:20250919T213846Z
UID:2970-1759420800-1759424400@rpm.physics.lbl.gov
SUMMARY:Speaker: Xinran Li (LBNL) - Title: Athermal phonon detectors for light dark matter search\, go small and go large
DESCRIPTION:Research Progress Meeting \nDate: October 2\, 2025 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Xinran Li (LBNL) \nTitle: Athermal phonon detectors for light dark matter search\, go small and go large \nAbstract: Light dark matter below 100MeV could only deposit sub-eV energies in detectors\, which is invisible to traditional solid state ionizing detectors. Athermal phonon detectors that use superconducting sensors to read out the phonon signals from the target crystals have the potential to achieve sub-eV energy threshold.\nAs a member of the TESSERACT collaboration\, I work on the development of transition edge sensors (TESs). Our recent DM search achieved 1.5eV threshold and extended the constraint on DM mass down to 44MeV with a 0.23g silicon detector. Our latest understanding of the stress-induced low energy excess events suggests that an even smaller target could help us achieve sub-eV threshold.\nOn the other hand\, to go large\, envisioning the next generation 10~100g scale large light dark matter detector\, kinetic inductance devices (KIDs) have the advantages of being easily scalable through multiplexing. I lead the effort to develop Hafnium (Hf) low critical temperature (Tc) KIDs for phonon sensing. The internal energy resolution of Hf KID is compatible to TESs\, while improving phonon collection efficiency is challenging. Several paths forward are defined and being actively pursued\, including quasiparticle trapping\, phonon blocking\, and parametric amplification. \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09 \nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-xinran-li-lbnl-title-athermal-phonon-detectors-for-light-dark-matter-search-go-small-and-go-large/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20251014T160000
DTEND;TZID=UTC:20251014T170000
DTSTAMP:20260414T213910
CREATED:20251009T130301Z
LAST-MODIFIED:20251009T130301Z
UID:2984-1760457600-1760461200@rpm.physics.lbl.gov
SUMMARY:Speaker: Tim Nelson (SLAC) - Title: Light Dark Matter eXperiment: A Discovery Experiment for Sub-GeV Dark Matter at SLAC
DESCRIPTION:Research Progress Meeting \nDate: October 14\, 2025 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Tim Nelson (SLAC) \nTitle: Light Dark Matter eXperiment: A Discovery Experiment for Sub-GeV Dark Matter at SLAC \nAbstract: As searches for WIMPs approach fundamental sensitivity limits\, interest in the more general class of thermal relics has emerged\, where these dark matter candidates give rise to clear and testable predictions in small\, accelerator-based experiments. The Light Dark Matter eXperiment (LDMX) — proposed to operate in End Station A at SLAC using LCLS-II drive beam — is uniquely capable of searching for sub-GeV thermal relics that can explain the observed dark matter abundance. In this talk\, I will review the motivations for these searches\, describe how LDMX works\, and discuss the status of efforts to realize the experiment. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95679892182?pwd=RU5xU2dDRFNabnR1U3pQMklkYWFIdz09 \nMeeting ID: 956 7989 2182 \nPasscode: 169037
URL:https://rpm.physics.lbl.gov/event/speaker-tim-nelson-slac-title-light-dark-matter-experiment-a-discovery-experiment-for-sub-gev-dark-matter-at-slac/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20251016T160000
DTEND;TZID=UTC:20251016T170000
DTSTAMP:20260414T213910
CREATED:20250915T162552Z
LAST-MODIFIED:20250915T162552Z
UID:2955-1760630400-1760634000@rpm.physics.lbl.gov
SUMMARY:Speaker: Chuan-Hong Liu (LBNL) - Title: Nonequilibrium Quasiparticles in Superconducting Quantum Bits
DESCRIPTION:Research Progress Meeting \nDate: October 16\, 2025 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Chuan-Hong Liu (LBNL) \nTitle: Nonequilibrium Quasiparticles in Superconducting Quantum Bits \nAbstract: The ideal superconductor offers a pristine host for the fragile quantum states of a superconducting quantum computer. With an energy gap protecting against low-energy excitations\, qubits should\, in principle\, be isolated from unwanted modes that cause irreversible decay of quantum information. In practice\, however\, a significant density of excitations persists above the superconducting ground state\, even at ultralow temperatures. These excitations\, known as quasiparticles\, can drain energy from the qubit mode and induce dephasing\, thereby degrading quantum computer’s performance. In this talk\, we will discuss two dominant mechanisms of quasiparticle generation: resonant millimeter-wave absorption and impacts from high-energy particles. We further show that careful device design\, combined with a well-shielded operating environment\, provides effective strategies to mitigate quasiparticle poisoning. A deeper understanding of these processes will be essential for realizing the next generation of superconducting quantum computers that are resilient against quasiparticle-induced errors. \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09 \nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-chuan-hong-liu-lbnl-title-nonequilibrium-quasiparticles-in-superconducting-quantum-bits/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20251023T160000
DTEND;TZID=UTC:20251023T170000
DTSTAMP:20260414T213910
CREATED:20250917T002023Z
LAST-MODIFIED:20250927T164502Z
UID:2961-1761235200-1761238800@rpm.physics.lbl.gov
SUMMARY:Speaker: Daniel Carney (LBNL) - Title: Experimental quantum gravity
DESCRIPTION:Research Progress Meeting \nDate: October 23\, 2025 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Daniel Carney (LBNL) \nTitle: Experimental quantum gravity \nAbstract: This will be an informal talk on some ideas related to testing aspects of quantum gravity in experiments. There are two basic directions I will cover. One is experiments aimed at determining whether the gravitational field is a quantized degree of freedom in the real world. In particular\, I will discuss an experiment in this direction that we developed joint with Holger Muller on campus and which is about to come online. The other direction is a bit newer and something that I think our quantum groups at LBL could contribute to: quantum simulation of holographic physics (e.g.\, AdS/CFT). \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09 \nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-dan-carney-lbnl-title-experimental-quantum-gravity/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20251028T160000
DTEND;TZID=UTC:20251028T170000
DTSTAMP:20260414T213910
CREATED:20251023T234106Z
LAST-MODIFIED:20251023T234106Z
UID:2994-1761667200-1761670800@rpm.physics.lbl.gov
SUMMARY:Speaker: Dan Dwyer (LBNL) - Title: Development of the DUNE Near Detector
DESCRIPTION:Research Progress Meeting \nDate: October 28\, 2025 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Dan Dwyer (LBNL) \nTitle: Development of the DUNE Near Detector \nAbstract: The Deep Underground Neutrino Experiment (DUNE) is an ambitious effort to measure neutrino properties via long-distance (1300 km) flavor oscillation of accelerator-generated neutrinos and antineutrinos. I will review the scientific challenges of this measurement\, the details of neutrino detection using immense liquid argon time-projection chambers\, and the crucial role of the DUNE Near Detector. I will highlight the role Berkeley Lab has played in development of the key technology and design of the Near Detector\, as well as experiences from operation of a large-scale prototype in a beam of antineutrinos. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95679892182?pwd=RU5xU2dDRFNabnR1U3pQMklkYWFIdz09 \nMeeting ID: 956 7989 2182 \nPasscode: 169037
URL:https://rpm.physics.lbl.gov/event/speaker-dan-dwyer-lbnl-title-development-of-the-dune-near-detector/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20251030T150000
DTEND;TZID=UTC:20251030T170000
DTSTAMP:20260414T213910
CREATED:20251022T192814Z
LAST-MODIFIED:20251029T205644Z
UID:2990-1761836400-1761843600@rpm.physics.lbl.gov
SUMMARY:Special RPM: Academic Career Panel
DESCRIPTION:Special Research Progress Meeting – note special time and location. \nDate: October 30\, 2025 \nTime: 3:00- 5:00 pm \nLocation: Building 50 Auditorium [In-Person and HYBRID]  \nPanelists:\nBenjamin Safdi (UC Berkeley & LBNL)\nGabriel Orebi Gann (UC Berkeley & LBNL)\nSimone Pagan Griso (LBNL)\nMichael Levi (LBNL)\nKathryn Grimm (CalState East Bay)\nTitle: Academic Career Panel \nSummary: The Academic Career Panel will focus on the faculty job application and interview process. The event is especially geared toward postdocs preparing to apply for national lab or university faculty positions\, but everyone is welcome to attend. Panelists will include LBNL senior scientists and faculty members from UC Berkeley and neighboring universities\, who will share their experiences and answer questions about pursuing academic careers. Attendees are encouraged to bring questions about any aspect of the academic job process. \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09 \nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/special-rpm-academic-career-panel/
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