BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Stewart Blusson Quantum Matter Institute - ECPv6.18.2//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://qmi.miffanytark.com
X-WR-CALDESC:Events for Stewart Blusson Quantum Matter Institute
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:America/Vancouver
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20250309T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20251102T090000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20260308T100000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0700
TZOFFSETTO:-0700
TZNAME:MST
DTSTART:20261101T090000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/Vancouver:20260910T100000
DTEND;TZID=America/Vancouver:20260910T110000
DTSTAMP:20260901T233335Z
CREATED:20260901T233335Z
LAST-MODIFIED:20260901T233335Z
UID:9504-1789034400-1789038000@qmi.miffanytark.com
SUMMARY:CM Seminar: The Nonlinear Terahertz Response of Graphene\, Marc Dignam\, Queen’s University
DESCRIPTION:Speaker: Marc Dignam\, Queen’s University \nTime: 10:00-11:00am \nLocation: BRIM 311 \nTitle: The Nonlinear Terahertz Response of Graphene \nAbstract: \nOver the past decade or more\, there has been a great deal of interest in the mechanical\, electronic and optical properties of graphene. The interest in the optical properties of graphene stems largely from two key features of the electronic band structure: it is gapless and the dispersion is linear near the Dirac points where the two bands touch.  Both features can be uniquely accessed using terahertz radiation\, because\, under the right conditions\, it can strongly drive both interband and intraband transitions. In this talk\, I will describe the formalism and computational results of our density-matrix approach to modelling the nonlinear terahertz response of graphene\, including various scattering mechanisms. As I will show\, in undoped graphene\, a very large nonlinearity can arise due to the interplay between the intraband and interband transitions. I will finish by showing how a parallel-plate waveguide configuration containing graphene can be used to generate the third harmonic of a 2.0 terahertz incident field with a power conversion efficiency of up to 20%. If time allows\, I will also discuss density functional results for the effects of impurities and strain on third harmonic generation in graphene. \nBiography: Marc Dignam received his PhD in theoretical condensed matter physics from the University of Toronto in 1991 and held a postdoctoral fellowship at AT&T Bell Labs in Murray Hill (1991–1993)\, working under Nobel laureate Horst Störmer. In 1994\, he joined MPB Technologies as an NSERC Industrial Research Fellow\, modelling and designing fibre‑optic communication devices and systems. He was a professor in the Department of Physics\, Engineering Physics & Astronomy at Queen’s University from 2000 to 2026 and is now a Professor Emeritus at Queen’s. Dr. Dignam’s research is in theoretical and computational condensed matter physics and optics. He has worked on the linear and nonlinear optical and terahertz response of semiconductor superlattices\, quantum wells\, and nanorods; the nonlinear terahertz response of monolayer and bilayer graphene; and nonlinear quantum optics in ring‑resonator and photonic‑crystal systems.
URL:https://qmi.miffanytark.com/event/cm-seminar-the-nonlinear-terahertz-response-of-graphene-marc-dignam-queens-university/
CATEGORIES:CM Seminar
ATTACH;FMTTYPE=:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Vancouver:20260917T100000
DTEND;TZID=America/Vancouver:20260917T110000
DTSTAMP:20260910T050431Z
CREATED:20260910T050431Z
LAST-MODIFIED:20260910T050431Z
UID:11444-1789639200-1789642800@qmi.miffanytark.com
SUMMARY:CM Seminar: Coherent bunching of anyons and their dissociation in interference experiments\, Moty Heiblum\, Weizmann Institute of Science
DESCRIPTION:Speaker: Moty Heiblum\, Weizmann Institute of Science \nTime: 10:00-11:00am \nLocation: BRIM 311 \nTitle: Coherent bunching of anyons and their dissociation in interference experiments \nAbstract: \nAharonov–Bohm interference of fractional quasiparticles in the quantum Hall effect generally reveals their elementary charge (e*). Recently\, our novel interferometry experiments found flux periods of ΔΦ = (e/e*)Φ0 (Φ0 the flux quantum) at moderate temperatures. More recent interference experiments of ‘particle–hole conjugated’ states (ν = 2/3\, 3/5\, and 4/7)\, revealed unexpected flux periodicities of ΔΦ = ν−1Φ0. Moreover\, the measured Fano factor (F) of the partitioned quasiparticles (in the interferometer’s quantum point contacts) was found to be F = ν\, instead of F = e*/e. These observations indicate that the interference (and F) suggest bunching (clustering) of the elementary quasiparticles\, such as coherent pairs\, triplets\, and quadruplets\, respectively. A small metallic gate (‘top-gate’)\, deposited in the center of the interferometer bulk\, forms an antidot (or a dot) when charged\, thus introducing ‘local quasiparticles’ at its perimeter in the bulk. Surprisingly\, charging the dot led to an unexpected dissociation of the ‘bunched quasiparticles’\, thus recovering the conventional flux periodicity set by the elementary charges. However\, the Fano factors consistently remained as F = ν. The two observations—bunching and debunching (dissociation)—were not expected by current theories. Planned experiments with Jain’s ‘particle states’ and with ‘even denominator states’ are planned.
URL:https://qmi.miffanytark.com/event/cm-seminar-coherent-bunching-of-anyons-and-their-dissociation-in-interference-experiments-moty-heiblum-weizmann-institute-of-science/
CATEGORIES:CM Seminar
ATTACH;FMTTYPE=:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Vancouver:20260921T090000
DTEND;TZID=America/Vancouver:20260923T163000
DTSTAMP:20260914T172725Z
CREATED:20260914T172725Z
LAST-MODIFIED:20260914T172725Z
UID:11445-1789981200-1790181000@qmi.miffanytark.com
SUMMARY:Quantum Information: Entanglement of Mathematics & Physics
DESCRIPTION:A three-day workshop cohosted by UBC Blusson QMI and RIKEN on the deep connections among quantum information\, mathematics\, and physics — spanning quantum gravity\, condensed matter\, quantum computing\, and quantum error correction. \n  \nPlease visit the event’s website for more info here.
URL:https://qmi.miffanytark.com/event/quantum-information-entanglement-of-mathematics-physics/
LOCATION:Fred Kaiser Building\, UBC\, Room 2020/2030\, 2332 Main Mall\, Vancouver\, British Columbia\, V6T 1Z4\, Canada
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Vancouver:20260924T100000
DTEND;TZID=America/Vancouver:20260924T110000
DTSTAMP:20260918T222322Z
CREATED:20260918T222322Z
LAST-MODIFIED:20260918T222322Z
UID:9578-1790244000-1790247600@qmi.miffanytark.com
SUMMARY:CM Seminar: Catalog of Altermagnetism in Magnetic Wallpaper/Space Groups and Nonsymmorphic Altermagnets\, Dr. Ching-Kai Chiu (RIKEN)
DESCRIPTION:Speaker:Dr. Ching-Kai Chiu\, RIKEN \nTime: 10:00-11:00am \nLocation: BRIM 311 \nTitle: Catalog of Altermagnetism in Magnetic Wallpaper/Space Groups and Nonsymmorphic Altermagnets \nAbstract: Altermagnets\, a third class of collinear magnets\, have zero net magnetization but spin-split bands\, even without spin–orbit coupling. Their standard classification into six wave types (d-\, g-\, and i-wave in 2D and 3D) relies on magnetic point groups of mostly centrosymmetric crystals. In this talk\, I will show that spinless time reversal replaces inversion\, so altermagnetism extends to non-centrosymmetric crystals. We catalog the Brillouin-zone spin splitting of all 17 altermagnetic wallpaper groups and 422 altermagnetic space groups\, 262 of which lack inversion\, consistent with the literature. Furthermore\, nonsymmorphic symmetries\, such as glide mirrors and screw axes\, enforce same-spin degeneracies on the zone boundary. Together with the opposite-spin degeneracies\, they force hourglass band crossings\, creating spin textures beyond the six wave types\, such as an i-wave-like spin winding on a square lattice. Our catalog serves as a guide for finding new altermagnets.\n\nReference: C. Le\, F. Cui\, I.-F. Io\, M. M. Hirschmann\, X. Wu\, and C.-K. Chiu\, arXiv:2607.10857 (2026).
URL:https://qmi.miffanytark.com/event/cm-seminar-catalog-of-altermagnetism-in-magnetic-wallpaper-space-groups-and-nonsymmorphic-altermagnets-dr-ching-kai-chiu-riken/
CATEGORIES:CM Seminar
ATTACH;FMTTYPE=:
END:VEVENT
END:VCALENDAR