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X-WR-CALNAME:Department of Physics and Astronomy
X-ORIGINAL-URL:https://physics.sciences.ncsu.edu
X-WR-CALDESC:Events for Department of Physics and Astronomy
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DTSTART;TZID=America/New_York:20251103T160000
DTEND;TZID=America/New_York:20251103T170000
DTSTAMP:20251029T131008Z
CREATED:20250819T232220Z
LAST-MODIFIED:20251029T131008Z
UID:52346-1762185600-1762189200@physics.sciences.ncsu.edu
SUMMARY:Physics Colloquium: Vashan Wright
DESCRIPTION:Vashan Wright\, UCSD / Scripps Institute of Geophysics and Planetary Physics \nSearching for Evidence of Water in the Martian Crust \nLiquid water existed on Mars in rivers\, lakes\, and as groundwater. The water is hypothesized to have subsequently been buried as ice or liquid water\, incorporated in minerals\, or lost to space. Geophysical measurements have the potential to test the first of these three hypotheses because water affects the physical properties of rocks\, such as elastic moduli and bulk density. We use a forward modeling approach and a Markov Chain Monte Carlo inversion scheme to identify combinations of rock type\, water distribution\, porosity\, and pore shape consistent with the seismic velocities and gravity within 50 km of the InSight lander on Mars. The shear Vs and compression Vp wave velocities within the upper 300 m are consistent with a crust composed of minimally cemented (< 2 % of the pores) sediments. Fractured rocks at this depth could host ice within 20% of the pore space. Vs within the upper 8 km of the crust are too low for a fully ice-saturated cryosphere. Using Vs\, lithology\, and gravity-derived bulk density data\, we find that the lower crust (11.5-22 km below the surface) beneath InSight is mafic and highly porous or felsic and less porous. The addition of Vp data leads to the conclusion that a lower crust composed of igneous rock with thin fractures filled with liquid water can explain the existing data\, though available seismic attenuation data provide a challenge to these findings. Our results have implications for understanding Mars’ water cycle from the Noachian to the present\, determining the fates of past surface water\, searching for past or extant life\, and assessing in-situ resource utilization for future missions. 
URL:https://physics.sciences.ncsu.edu/event/physics-colloquium-vashan-wright/
CATEGORIES:Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20251107T093000
DTEND;TZID=America/New_York:20251107T113000
DTSTAMP:20250930T171043Z
CREATED:20250930T171043Z
LAST-MODIFIED:20250930T171043Z
UID:52641-1762507800-1762515000@physics.sciences.ncsu.edu
SUMMARY:Preliminary Exam - Mustafa Türe
DESCRIPTION:Unconventional Solitonic Superfluorescence: A mechanism for high-temperature quantum coherence in metal-halide perovskites
URL:https://physics.sciences.ncsu.edu/event/preliminary-exam-mustafa-ture/
LOCATION:Partners II 1514
CATEGORIES:In The Department
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20251108T080000
DTEND;TZID=America/New_York:20251108T170000
DTSTAMP:20250929T210330Z
CREATED:20250929T210330Z
LAST-MODIFIED:20250929T210330Z
UID:52636-1762588800-1762621200@physics.sciences.ncsu.edu
SUMMARY:2025 LEAP!
DESCRIPTION:The LEAP! workshop invites high school students to investigate these questions inside the labs of working scientists at NC State. \n  \nThe 202 event will be held on Saturday\, Nov 8. You can sign up via this link.
URL:https://physics.sciences.ncsu.edu/event/2025-leap/
LOCATION:Riddick Hall\, 2401 Stinson Dr.\, Raleigh\, NC
CATEGORIES:For the Public,In The Department
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20251112T160000
DTEND;TZID=America/New_York:20251112T170000
DTSTAMP:20251106T193648Z
CREATED:20250930T171831Z
LAST-MODIFIED:20251106T193648Z
UID:52648-1762963200-1762966800@physics.sciences.ncsu.edu
SUMMARY:Physics Colloquium: James Glazier
DESCRIPTION:Title and Abstract Details are Forthcoming
URL:https://physics.sciences.ncsu.edu/event/cmb-seminar-james-glazier/
LOCATION:Riddick 325\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia,For the Public
ORGANIZER;CN="Julio Monti Belmonte":MAILTO:jbelmon2@ncsu.edu
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20251117T080000
DTEND;TZID=America/New_York:20251117T170000
DTSTAMP:20251117T153550Z
CREATED:20251117T153550Z
LAST-MODIFIED:20251117T153550Z
UID:52713-1763366400-1763398800@physics.sciences.ncsu.edu
SUMMARY:2025 Nobel Prize in Physics Lecture
DESCRIPTION:Title: Quantum Tunneling on a Macroscopic Scale \nAbstract: Join Dr. Weijian Chen and Dr. Xiang Li to explore the scientific journey that led to the discovery of macroscopic quantum mechanical tunneling and energy quantization in an electric circuit\, an achievement honored by the 2025 Nobel Prize in Physics. These discoveries provide opportunities for developing new generations of quantum technology\, including quantum cryptography\, quantum computers\, and quantum sensors. \nBio: Dr. Weijian Chen is an Assistant Professor of Physics at NC State University. His research group uses superconducting circuits and qubits to explore quantum physics and quantum information science applications. Dr. Xiang Li is a Postdoctoral Research Scholar from Chen’s lab and an expert in cold atom experiments.
URL:https://physics.sciences.ncsu.edu/event/2025-nobel-prize-in-physics-lecture/
LOCATION:Daily Planet Cafe\, 121 W Jones St\, Raleigh\, NC\, 27601\, United States
CATEGORIES:For the Public
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DTSTART;TZID=America/New_York:20251117T160000
DTEND;TZID=America/New_York:20251117T170000
DTSTAMP:20251110T164607Z
CREATED:20250819T232516Z
LAST-MODIFIED:20251110T164607Z
UID:52348-1763395200-1763398800@physics.sciences.ncsu.edu
SUMMARY:Physics Colloquium: Michael Rubinstein
DESCRIPTION:Michael Rubinstein\, Duke University \nTitle: The Loops of Life \nAbstract: In mammalian cells\, the cohesin protein complex is believed to regulate chromatin during interphase through active loop extrusion\, in which dynamic loops are formed by cohesin translocating along chromatin. We developed a theoretical model that quantifies how key parameters\, including cohesin residence time on chromatin\, extrusion velocity\, and the number density of chromatin-bound cohesins\, regulate genomic contacts. The model describes chromatin contact probabilities and predicts that loop formation probability is a nonmonotonic function of loop length. Our theory demonstrates that active loop extrusion causes the apparent fractal dimension of chromatin to cross over between two and four at contour lengths on the order of 30 kilo-base pairs. This work provides a theoretical basis for the compact organization of interphase chromatin explaining the physical reason for the segregation of topologically associated domains and suppression of chromatin entanglements by up to a factor of 50 which contributes to efficient gene regulation by distal elements such as enhancers or silencers.
URL:https://physics.sciences.ncsu.edu/event/physics-colloquium-michael-rubinstein/
LOCATION:Riddick 325\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20251120T120000
DTEND;TZID=America/New_York:20251120T130000
DTSTAMP:20251028T163248Z
CREATED:20250930T172306Z
LAST-MODIFIED:20251028T163248Z
UID:52650-1763640000-1763643600@physics.sciences.ncsu.edu
SUMMARY:CMB Seminar: Luis Zambrano
DESCRIPTION:Title: A Generalized Critical State Approach for Granular Rheology and Impact Loading\nAbstract: The dynamics of dense granular-fluid mixtures\, such as those occurring in landslides and debris flows\, embody a complex interplay and transition between solid mechanics and fluid dynamics. Despite major advances in large-deformation analysis\, geotechnical modeling remains largely governed by strain-independent critical state soil mechanics\, even though substantial evidence indicates that granular rheologies more accurately describe the constitutive behavior of materials undergoing flow and large strains.\nIn this seminar\, I will present a constitutive framework that extends the critical state concept by incorporating principles from particle kinetic theory and granular rheology. This generalized critical state formulation captures the continuum of granular behavior beyond the solid and dense flow regimes. Using numerical simulations of impact triaxial tests\, the framework successfully predicts enhanced peak deviatoric stresses and pronounced dilation at small strains under high-velocity impact loading. These results demonstrate the potential of extended critical state models to describe strain-rate–dependent rheologies and hydromechanical coupling in granular-fluid mixtures. \n 
URL:https://physics.sciences.ncsu.edu/event/cmb-seminar-luis-zambrano/
LOCATION:Bureau of Mines 201
CATEGORIES:CMB Seminar
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