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X-WR-CALDESC:Events for Department of Physics and Astronomy
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DTSTART;TZID=America/New_York:20250303T160000
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CREATED:20250210T204347Z
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SUMMARY:Physics Colloquium: Gleb Finkelstein
DESCRIPTION:Gleb Finkelstein\, Duke University \nTitle: Multiterminal Graphene-based Josephson Junctions — a Playground for Non-linear and Quantum Physics \nAbstract: Josephson junctions are at the heart of many quantum devices\, including superconducting qubits. In the recently developed multi-terminal Josephson junctions\, several superconducting contacts are made to a common non-superconducting region. It has been predicted that these devices could emulate the electronic bands of a real crystal\, including topological materials.\nIn this talk\, I introduce Josephson junctions and present the recent work on the multi-terminal junctions made of graphene. Our main interest is the “multiplet” resonances\, which are observed at commensurate voltages across the junctions. We show that these resonances can be established via a synchronization mechanism analogous to the classical dynamics of the Kapitza pendulum.\n \nHost: Weijian Chen
URL:https://physics.sciences.ncsu.edu/event/physics-colloquium-gleb-finkelstein/
LOCATION:Riddick 325\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia
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DTSTART;TZID=America/New_York:20250306T120000
DTEND;TZID=America/New_York:20250306T130000
DTSTAMP:20250226T133841Z
CREATED:20241203T191449Z
LAST-MODIFIED:20250226T133841Z
UID:51665-1741262400-1741266000@physics.sciences.ncsu.edu
SUMMARY:CMB Seminar: Charles Maher
DESCRIPTION:Title: Hyperuniformity of Disordered Network Metamaterials Derived from Hyperuniform Point Patterns \nAbstract: Disordered hyperuniform two-phase heterogeneous materials are those whose density fluctuations are anomalously suppressed at large length scales compared to standard disordered materials. Such hyperuniform materials are found to possess unique and desirable transport and elastic properties that are isotropic and robust to defects. Disordered network metamaterials are another exciting class of structure\, which have better stiffness- and strength-to-weight ratios than their bulk counterparts. Thus\, it is of interest to design and characterize disordered hyperuniform network metamaterials that inherit the desirable properties of both of the aforementioned classes of media. Here\, we characterize the structure of networks generated via Voronoi\, Delaunay\, Delaunay-Centroidal\, and Gabriel tessellations of stealthy and non-stealthy hyperuniform point patterns with tunable short-range disorder. In particular\, we examine the extent to which the hyperuniformity of the underlying point pattern is preserved when converted into a disordered network metamaterial. This work will inform the design of 3D-printable disordered hyperuniform materials for use in\, e.g.\, the biomedical and areospace fields. \nHost: Karen Daniels \nZoom: https://ncsu.zoom.us/j/99432171491
URL:https://physics.sciences.ncsu.edu/event/cmb-seminar-charles-maher/
LOCATION:Bureau of Mines 201
CATEGORIES:CMB Seminar
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20250313T113000
DTEND;TZID=America/New_York:20250313T133000
DTSTAMP:20250307T222233Z
CREATED:20250307T222233Z
LAST-MODIFIED:20250307T222233Z
UID:51969-1741865400-1741872600@physics.sciences.ncsu.edu
SUMMARY:Final Defense - Clark Hickman
DESCRIPTION:Development of Magnetic and Neutron Systems Contributing to the Search for the Electric Dipole Moment of the Neutron
URL:https://physics.sciences.ncsu.edu/event/final-defense-clark-hickman/
LOCATION:Riddick 415\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
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DTSTART;TZID=America/New_York:20250317T160000
DTEND;TZID=America/New_York:20250317T170000
DTSTAMP:20250306T183505Z
CREATED:20250306T183505Z
LAST-MODIFIED:20250306T183505Z
UID:51963-1742227200-1742230800@physics.sciences.ncsu.edu
SUMMARY:Physics Colloquium: Kim Venn
DESCRIPTION:Kim Venn\, University of Victoria \nTitle: Exploring the Faintest Milky Way Satellites \nAbstract: Star clusters and dwarf galaxies are known to cohabit the outer Milky Way halo\, occasionally as tidally disrupted streams. It is useful to distinguish these objects\, as the “ultra faint” dwarf galaxies probe the low mass end of the dark matter halo distribution function\, and their properties are used to constrain dark matter particle scenarios. Similarly\, any dispersions or wrinkles in tidally disrupted “star cluster” streams are used to explore the cold dark matter subhalo population in the Milky Way halo. Unfortunately\, the faintest of these systems\, where the physics becomes the most interesting\, are the most challenging to classify and do impact our understanding of dark matter. In this talk\, I will discuss faint stellar systems found in recent imaging surveys\, and the efforts to use chemistry\, dynamics\, and N-body simulations to reveal their underlying nature(s). \nHost: Ian Roederer
URL:https://physics.sciences.ncsu.edu/event/physics-colloquium-kim-venn/
LOCATION:Riddick 325\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20250324T160000
DTEND;TZID=America/New_York:20250324T170000
DTSTAMP:20250305T173329Z
CREATED:20250305T163655Z
LAST-MODIFIED:20250305T173329Z
UID:51955-1742832000-1742835600@physics.sciences.ncsu.edu
SUMMARY:Physics Colloquium: Jonah Miller
DESCRIPTION:Jonah Miller\, Los Alamos National Lab \nTitle: What High Fidelity Supercomputer Simulations Can Teach Us About Matter at the Highest Densities and the Origin of Heavy Elements \nAbstract: The 2017 detection of the in-spiral and merger of two neutron stars was a landmark discovery in astrophysics. Through a wealth of multi-messenger data\, we now know that the merger of these ultracompact stellar remnants is a central engine of short gamma ray bursts and a site of r-process nucleosynthesis\, where the heaviest elements in our universe are formed. The radioactive decay of unstable heavy elements produced in such mergers powers an optical and infra-red transient: The kilonova.\nAlong with core-collapse supernovae\, neutron star mergers offer insight into the behavior of matter at incredibly high densities and temperatures. While pairwise interactions in this regime are well understood\, collective behavior is not. This is the so-called high-temperature nuclear equation of state\, and it is a grand challenge problem in nuclear physics.\nIn this talk\, I present my research program of nuclear astrophysics\, where I use high-fidelity supercomputer simulations to investigate both the origin of heavy elements and the nuclear equation of state in core collapse supernovae\, neutron star mergers\, and their aftermath. I will discuss exciting results in this area\, as well as recent progress on new modeling capabilities that leverage GPU computing. \nHost: Carla Fröhlich \n 
URL:https://physics.sciences.ncsu.edu/event/colloquium-physics-colloquium-jonah-miller/
LOCATION:Riddick 325\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia
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