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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:20210314T070000
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20220615T100000
DTEND;TZID=America/New_York:20220615T110000
DTSTAMP:20260416T142300
CREATED:20220615T142558Z
LAST-MODIFIED:20220615T142616Z
UID:19618-1655287200-1655290800@physics.sciences.ncsu.edu
SUMMARY:Grad Tea in Partner's II 1525
DESCRIPTION:
URL:https://physics.sciences.ncsu.edu/event/grad-tea-in-partners-ii-1525/
LOCATION:NC
CATEGORIES:In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230301T160000
DTEND;TZID=America/New_York:20230301T170000
DTSTAMP:20260416T142300
CREATED:20230118T170759Z
LAST-MODIFIED:20230206T024013Z
UID:20305-1677686400-1677690000@physics.sciences.ncsu.edu
SUMMARY:Quantum Candidate Talk
DESCRIPTION:Title: Scalable\, Ultrafast Quantum Information Processors in Nanophotonics\n\n\nAbstract: Continuous-variable quantum information processing (CVQIP) through quantum optics offers unprecedented scalability for developing fault-tolerant information processors at room temperature. The critical interest in CVQIP comes primarily from its ability to generate large-scale entangled quantum states\, known as cluster states\, which serve as a computation substrate for performing measurement-based quantum computation. Cluster states are typically generated from single\, or two-mode squeezed vacuum states. Despite significant progress\, generating\, manipulating\, and measuring squeezed states in nanophotonics remains challenging\, with performances required for various applications in quantum information science and technology. \n\nFirstly\, I will present our approach to overcoming this challenge in the rapidly emerging lithium niobate nanophotonic platform by utilizing ultrashort-pulse phase-sensitive optical parametric amplifiers for the generation and all-optical loss-tolerant measurement of squeezed states on the same chip [1]. Secondly\, we discuss hardware-efficient quantum state tomography and quantum state engineering for non-Gaussian resources\, which are essential to quantum computational advantages and fault tolerance [2-4]. Finally\, I will outline all-optical routes for fault-tolerant universal quantum computing architectures with ultrafast clock speeds\, measurement-free quantum communication networks\, and quantum-enhanced chip-scale distributed sensors.\n\n[1] R. Nehra et al\, Science 377 (6612)\, 1333-1337 (2022)\n[2-4] R. Nehra et al. Optica 6 (10)\, 1356-1360 (2019); R. Nehra et al. Physical Review Research 2 (4)\, 042002 (2020);  R. Yanagimoto\, R. Nehra\, et al.\, arXiv:2209.01114 \n\n\nHost: John Thomas
URL:https://physics.sciences.ncsu.edu/event/quantum-candidate-talk-6/
LOCATION:Riddick 301\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20230303
DTEND;VALUE=DATE:20230304
DTSTAMP:20260416T142300
CREATED:20230214T161209Z
LAST-MODIFIED:20230214T161209Z
UID:20453-1677801600-1677887999@physics.sciences.ncsu.edu
SUMMARY:Prospective Graduate Student Visit
DESCRIPTION:
URL:https://physics.sciences.ncsu.edu/event/prospective-graduate-student-visit/
LOCATION:NC
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230306T160000
DTEND;TZID=America/New_York:20230306T170000
DTSTAMP:20260416T142300
CREATED:20230214T155224Z
LAST-MODIFIED:20230220T124635Z
UID:20440-1678118400-1678122000@physics.sciences.ncsu.edu
SUMMARY:Physics Colloquium: Zhanybek Alpichshev
DESCRIPTION:Title: “Shining light on Lead-Halide Perovskites: what optics can tell about the inner workings of the Solar-Cell-champion material” \nAbstract: Lead halide perovskite are remarkable in many respects. Even samples with relatively unassuming quality were demonstrated to exhibit some of the most fundamental phenomena in semiconductor physics\, such as laser cooling and room-temperature quantum coherence in the form of super-radiance. Perovskites are also known for their “resilience” against formation of deep defects that can act as charge traps\, making them excellent materials for photo-voltaic applications: perovskite-based solar cells have recently nearly reached the levels of the state-of-the-art conventional Si- based devices in terms of efficiency. Amongst these achievements\, perhaps the most puzzling fact is that there is still no clear understanding as to what is underlying this remarkable performance in the microscopic level.\nIn this presentation I will discuss how much can one learn about the basic properties of perovskites by means of optics. First\, I will talk about Faraday rotation and the complex refractive index in a paradigmatic perovskite CH3NH3PbBr3 in a broad wavelength range\, and demonstrate that in order to account for the experiment even on the qualitative level\, one needs to amend the usual minimal coupling scheme and to introduce an atomic-level coupling between electric field and the spin degree of freedom (!). This term has far reaching consequences for the low-energy phenomenology of perovskites and provide a few examples of the novel exotic phenomena predicted by our model.\nThen I will proceed with the optical response of CH3NH3PbBr3 in the mid-infrared range will falls into the domain of the vibrational excitations of ion. I will show how the properties of the semi-autonomous organic cation molecule depend on the local lattice configuration\, and hence can be used to shed light on the challenging problem of the interaction between the quasi-free organic cation molecule and the soft\, anharmonic and dynamically disordered inorganic cage. \n\nHost: Kenan Gundogdu
URL:https://physics.sciences.ncsu.edu/event/physics-colloquium-zhanybek-alpichshev/
LOCATION:NC
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230307T153000
DTEND;TZID=America/New_York:20230307T163000
DTSTAMP:20260416T142300
CREATED:20230303T160416Z
LAST-MODIFIED:20230303T161822Z
UID:20575-1678203000-1678206600@physics.sciences.ncsu.edu
SUMMARY:TNT Seminar: Matthew Mumpower
DESCRIPTION:Title: Machine Learning the Ground State Masses of Atomic Nuclei \nAbstract: Machine Learning and Artificial Intelligence methods offer wide applicability to a class of problems known collectively as “inverse problems.” The solution to such problems involves the calculation of the causal factors that are responsible for a set of observations. Inverse problems are frequently encountered in nuclear physics\, where measurements exist and these observations must be reconciled with theoretical models and interpretation. I will discuss a probabilistic machine learning technique applied to the binding energy of atomic nuclei. The set of observations comes from the Atomic Mass Evaluation (AME)\, which totals over 2000 data points. I show that inclusion of physics-based inputs as well as physics-informed training yields neural networks that are capable of describing these observations with a high degree of precision. Because the method is stochastic\, it also provides an estimate of uncertainty for each prediction. I discuss the capacity of such modeling to extrapolate into regions of unmeasured nuclei that is needed for applications such as astrophysics. \nHost: Gail McLaughlin
URL:https://physics.sciences.ncsu.edu/event/tnt-seminar-matthew-mumpower/
LOCATION:Riddick 400P\, 2401 Katherine Stinson Dr\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Other Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20220615T100000
DTEND;TZID=America/New_York:20220615T110000
DTSTAMP:20260416T142300
CREATED:20220615T142558Z
LAST-MODIFIED:20220615T142616Z
UID:19618-1655287200-1655290800@physics.sciences.ncsu.edu
SUMMARY:Grad Tea in Partner's II 1525
DESCRIPTION:
URL:https://physics.sciences.ncsu.edu/event/grad-tea-in-partners-ii-1525/
LOCATION:NC
CATEGORIES:In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230309T120000
DTEND;TZID=America/New_York:20230309T130000
DTSTAMP:20260416T142300
CREATED:20230207T131535Z
LAST-MODIFIED:20230303T162315Z
UID:20413-1678363200-1678366800@physics.sciences.ncsu.edu
SUMMARY:TNT Seminar: Matthias Heinz
DESCRIPTION:Title: Precision nuclear structure with the in-medium similarity renormalization group \nAbstract: Ab initio nuclear structure theory aims to predict the structure of atomic nuclei from “first principles\,” employing systematically improvable approximations in the determination of inter-nucleon potentials and in the solution of the many-body Schrödinger equation. Over the past decade\, the in-medium similarity renormalization group (IMSRG) has been established as a powerful and flexible method to approaching the many-body problem. I will discuss the developments that have allowed the IMSRG to emerge as a consistent framework for predicting the structure of medium-mass nuclei (closed- and open-shell) and have extended the reach of the method to heavy systems. Recently\, we have worked on extending the IMSRG to the next order\, the IMSRG(3) with normal-ordered three-body interactions. I will discuss the improved description of the structure neutron-rich calcium isotopes made possible by the IMSRG(3) and what this means for existing discrepancies to experimental trends. \nHost: Sebastian König
URL:https://physics.sciences.ncsu.edu/event/tnt-seminar-matthias-heinz/
LOCATION:Riddick 314
CATEGORIES:Other Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20220615T100000
DTEND;TZID=America/New_York:20220615T110000
DTSTAMP:20260416T142300
CREATED:20220615T142558Z
LAST-MODIFIED:20220615T142616Z
UID:19618-1655287200-1655290800@physics.sciences.ncsu.edu
SUMMARY:Grad Tea in Partner's II 1525
DESCRIPTION:
URL:https://physics.sciences.ncsu.edu/event/grad-tea-in-partners-ii-1525/
LOCATION:NC
CATEGORIES:In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230315T150000
DTEND;TZID=America/New_York:20230315T170000
DTSTAMP:20260416T142300
CREATED:20230206T172254Z
LAST-MODIFIED:20230313T194958Z
UID:20410-1678892400-1678899600@physics.sciences.ncsu.edu
SUMMARY:Final Defense - Akhil Francis
DESCRIPTION:Quantum computing to study condensed matter systems
URL:https://physics.sciences.ncsu.edu/event/final-defense-akhil-francis/
LOCATION:NC
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230320T133000
DTEND;TZID=America/New_York:20230320T143000
DTSTAMP:20260416T142300
CREATED:20230316T161837Z
LAST-MODIFIED:20230320T130345Z
UID:20630-1679319000-1679322600@physics.sciences.ncsu.edu
SUMMARY:Physics Colloquium: Paschalis Gkoupidenis
DESCRIPTION:Title: Organic neuromorphic electronics \nAbstract: Harnessing the exceptional efficiency of the brain in information processing at the technological level can be condensed in the terms “artificial intelligence” and “neuromorphic computing”. A popular approach in artificial intelligence is the representation of information processing aspects found in biological systems with artificial neural networks (ANNs). This approach is based on executing algorithms\, that loosely represent the function of the nervous system\, on traditional computer architectures. Over the last decade\, the field of artificial intelligence (AI) has demonstrated an enormous potential for complex processing and efficient computing. However\, concepts of AI are mainly based on digital operating principles\, while being part of an analogue world with great diversity in signaling. Moreover\, AI still lacks the efficiency and computing capacity of biological systems. Alternatively\, neural functions can be directly emulated with non-conventional devices\, circuits and architectures. This hardware-based paradigm of brain-inspired processing is known as neuromorphic electronics. In this talk\, various neuromorphic devices will be presented that are based on organic mixed conductors\, materials that are traditionally used in bioelectronics. A prominent example of a device in bioelectronics that exploits mixed ionic-electronic conductivity phenomena is the organic electrochemical transistor (OECT). Organic neuromorphic electronics based on OECTs have the ability to emulate efficiently and with fidelity a wide range of bio-inspired functions including synaptic plasticity and neuronal dynamics. Their operation in common electrolytes permits the definition of spatially distributed multiple inputs at a single device level. The presence of a global electrolyte in an array of devices also allows for the homeostatic or global control of\nthe array. Global electrical oscillations can be used as global clocks that phase-lock the local activity of individual devices in analogy to the global oscillations in the brain. Moreover\, “soft” interconnectivity through the electrolyte can be defined\, a feature that paves the way for parallel interconnections between devices with minimal hard-wired connections. Finally\, practical demonstrations will be shown\, highlighting the potential of organic materials in robotics\, neuromorphic sensing and biointerfacing. \nHost: Dan Dougherty \nYou can join via Zoom. (Meeting ID: 937 6440 9631; Passcode: 518107)
URL:https://physics.sciences.ncsu.edu/event/physics-colloquium-paschalis-gkoupidenis/
LOCATION:Room 2104\, Toxicology Building\, Raleigh\, NC\, 27606\, United States
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230320T160000
DTEND;TZID=America/New_York:20230320T170000
DTSTAMP:20260416T142300
CREATED:20221205T132608Z
LAST-MODIFIED:20230215T160327Z
UID:20235-1679328000-1679331600@physics.sciences.ncsu.edu
SUMMARY:Physics Colloquium: Sarah L. Keller
DESCRIPTION:Title: Phase-separating membranes in hungry yeast are tiny\, living thermostats \nAbstract: Liquid-liquid phase separation in biological membranes is usually described as occurring on sub-micron length scales. A stunning counterexample occurs in S. cerevisiae – the same yeast used to brew beer and make bread. When these yeast sense that they have run out of glucose to eat\, coexisting liquid phases appear within the lipid membrane that surrounds one of their organelles. This phase separation is functionally important\, enabling yeast survival during periods of stress. This talk will review recent results showing: (1) This miscibility transition is reversible as would be expected from equilibrium thermodynamics\, even though it occurs in a living system. (2) Yeast actively regulate this phase transition to hold the membrane transition ~15C above the yeast growth temperature. (3) In cases when domains appear as stripes\, there is no current theory that explains all material properties and physical observables of the system. No previous knowledge of biology is needed for this seminar. \nHost: Mary Elting
URL:https://physics.sciences.ncsu.edu/event/physics-colloquium-sarah-l-keller/
LOCATION:Riddick 301\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230321T140000
DTEND;TZID=America/New_York:20230321T160000
DTSTAMP:20260416T142300
CREATED:20230309T174716Z
LAST-MODIFIED:20230309T201348Z
UID:20611-1679407200-1679414400@physics.sciences.ncsu.edu
SUMMARY:Final Defense - Elliott Holliday
DESCRIPTION:Classical and Quantum Physics-Enhanced Machine Learning Algorithms in the Ordered and Chaotic Regimes
URL:https://physics.sciences.ncsu.edu/event/final-defense-elliott-holliday/
LOCATION:00G20 Kamphoefner Hall\, 00G20 2221 Katharine Stinson Driv\, Raleigh\, NC
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20220615T100000
DTEND;TZID=America/New_York:20220615T110000
DTSTAMP:20260416T142300
CREATED:20220615T142558Z
LAST-MODIFIED:20220615T142616Z
UID:19618-1655287200-1655290800@physics.sciences.ncsu.edu
SUMMARY:Grad Tea in Partner's II 1525
DESCRIPTION:
URL:https://physics.sciences.ncsu.edu/event/grad-tea-in-partners-ii-1525/
LOCATION:NC
CATEGORIES:In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230322T160000
DTEND;TZID=America/New_York:20230322T170000
DTSTAMP:20260416T142300
CREATED:20230310T181215Z
LAST-MODIFIED:20230316T163526Z
UID:20617-1679500800-1679504400@physics.sciences.ncsu.edu
SUMMARY:Physics Colloquium: Xi Wang
DESCRIPTION:Title: Interacting Opto-Moiré Quantum Matter \nAbstract: Moiré superlattices of two-dimensional (2D) materials are an emerging platform for studying new physical phenomena with high tunability. Strong excitonic responses in transition metal dichalcogenides (TMDs) allow optical access to the wealth of physics. In this talk\, I will present our recent results about interactions between excitons and charge carriers trapped in moiré potentials. We have discovered novel exciton many-body ground states composed of moiré excitons and correlated electron lattices\, resulting from new interaction between exciton and charges enabled by unusual quantum confinement in 2D moiré superlattices. The interaction further enriches the magnetic phases in such moiré superlattices. We have observed that the spin-spin interactions between moiré trapped holes can be drastically tuned by optical excitation power. The mechanism points to the unique excitons-mediated long-range exchange interaction between moiré trapped carriers. This discovery adds a new and dynamic tuning knob to the rich many-body Hamiltonian of moiré quantum matter. Our work provides the framework for understanding and engineering electronic and excitonic states in moiré quantum matters. \nHost: Dan Dougherty
URL:https://physics.sciences.ncsu.edu/event/physics-colloquium-xi-wang/
LOCATION:Riddick 301\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230327T160000
DTEND;TZID=America/New_York:20230327T170000
DTSTAMP:20260416T142300
CREATED:20221205T133135Z
LAST-MODIFIED:20230314T170239Z
UID:20237-1679932800-1679936400@physics.sciences.ncsu.edu
SUMMARY:Physics Colloquium: Bert de Jong
DESCRIPTION:Title: Practical approaches to probing many-body systems with quantum computers \nAbstract: Quantum computing has the potential to develop as an experimental and computational platform for physics\, chemistry\, materials science\, and biology. Considerable progress has been made in hardware\, software and algorithms that  allow us to probe many-body systems with quantum computers\, and make scientific discovery a reality. In this talk\, I will discuss some of the recent developments in quantum computing algorithms to simulate the complex many-body systems common in physical sciences. To obtain reliable results from NISQ quantum computers\, error mitigation\, and reduction of computational complexity are essential. I will highlight some of our efforts to enable reliable simulations on quantum hardware. \nHost: Lex Kemper \n  \nAlternate Zoom Link: https://ncsu.zoom.us/j/99067948192?pwd=eHlNeUJ3ZWZYWGN0NHlzQ0h4anI1UT09\nMeeting ID: 990 6794 8192\nPasscode: 674126
URL:https://physics.sciences.ncsu.edu/event/physics-colloquium-bert-de-jong/
LOCATION:Riddick 301\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20220615T100000
DTEND;TZID=America/New_York:20220615T110000
DTSTAMP:20260416T142300
CREATED:20220615T142558Z
LAST-MODIFIED:20220615T142616Z
UID:19618-1655287200-1655290800@physics.sciences.ncsu.edu
SUMMARY:Grad Tea in Partner's II 1525
DESCRIPTION:
URL:https://physics.sciences.ncsu.edu/event/grad-tea-in-partners-ii-1525/
LOCATION:NC
CATEGORIES:In The Department
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230329T160000
DTEND;TZID=America/New_York:20230329T170000
DTSTAMP:20260416T142300
CREATED:20230214T155350Z
LAST-MODIFIED:20230328T175617Z
UID:20438-1680105600-1680109200@physics.sciences.ncsu.edu
SUMMARY:Physics Colloquium: Danny Doucette
DESCRIPTION:Title: Changing learning in introductory labs: A PER-based course transformation \nAbstract: The algebra- and calculus-based introductory physics labs at NC State serve about 2500 students each semester. Lab courses like these are an important opportunity for students to learn experimental skills and ways of thinking. Over the past few years\, physics education research (PER) has increasingly focused on learning in labs\, providing valuable insight to guide instructional transformation. In this colloquium talk\, I will highlight some PER scholarship related to labs\, provide an overview of the transformation of some of our introductory lab courses\, and share some preliminary evaluation results. \nHost: Karen Daniels \n  \nAlternate Zoom Link: https://ncsu.zoom.us/j/98051274943?pwd=Q1RTTjhkT25VVCt6RS9BMGE3c0UxQT09 \nMeeting ID: 980 5127 4943 \nPasscode: 851210
URL:https://physics.sciences.ncsu.edu/event/physics-collloquium-danny-doucette/
LOCATION:Riddick 301\, 2401 Stinson Drive\, Raleigh\, NC\, 27695\, United States
CATEGORIES:Colloquia
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230330T150000
DTEND;TZID=America/New_York:20230330T163000
DTSTAMP:20260416T142300
CREATED:20230330T165930Z
LAST-MODIFIED:20230330T165930Z
UID:20716-1680188400-1680193800@physics.sciences.ncsu.edu
SUMMARY:Preliminary Exam - Xiang Li
DESCRIPTION:Hydrodynamics of unitary Fermi gas in a box potential
URL:https://physics.sciences.ncsu.edu/event/preliminary-exam-xiang-li/
LOCATION:NC
END:VEVENT
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