BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CMSA - ECPv6.15.18//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:CMSA
X-ORIGINAL-URL:https://cmsa.fas.harvard.edu
X-WR-CALDESC:Events for CMSA
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20210314T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20211107T060000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20220313T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20221106T060000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20230312T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20231105T060000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221115T093000
DTEND;TZID=America/New_York:20221115T110000
DTSTAMP:20260410T201246
CREATED:20240229T095854Z
LAST-MODIFIED:20240229T095854Z
UID:10002884-1668504600-1668510000@cmsa.fas.harvard.edu
SUMMARY:Topology of the Fermi sea: Ordinary metals as topological materials
DESCRIPTION:Quantum Matter Seminar \nSpeaker: Pok Man Tam (University of Pennsylvania) \nTitle: Topology of the Fermi sea: Ordinary metals as topological materials \nAbstract: It has long been known that the quantum ground state of a metal is characterized by an abstract manifold in momentum space called the Fermi sea. Fermi sea can be distinguished topologically in much the same way that a ball can be distinguished from a donut by counting the number of holes. The associated topological invariant\, i.e. the Euler characteristic (χ_F)\, serves to classify metals. Here I will survey two recent proposals relating χ_F  to experimental observables\, namely: (i) equal-time density/number correlations [1]\, and (ii) Andreev state transport along a planar Josephson junction [2]. Moreover\, from the perspective of quantum information\, I will explain how multipartite entanglement in real space probes the Fermi sea topology in momentum space [1]. Our works not only provide a new connection between topology and entanglement in gapless quantum matters\, but also suggest accessible experimental platforms to extract the topology in metals. \n[1] P. M. Tam\, M. Claassen\, C. L. Kane\, Phys. Rev. X 12\, 031022 (2022) \n[2] P. M. Tam and C. L. Kane\, arXiv:2210.08048 \n 
URL:https://cmsa.fas.harvard.edu/event/qm_tba-7/
CATEGORIES:Quantum Matter
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-QMMP-Seminar-11.15.22.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20221115T110000
DTEND;TZID=America/New_York:20221115T120000
DTSTAMP:20260410T201246
CREATED:20230730T184327Z
LAST-MODIFIED:20240228T111805Z
UID:10001155-1668510000-1668513600@cmsa.fas.harvard.edu
SUMMARY:The Emergence Proposal in Quantum Gravity and the Species Scale
DESCRIPTION:Swampland Seminar \nSpeaker: Alvaro Herraez (Saclay) \nTitle: The Emergence Proposal in Quantum Gravity and the Species Scale \nAbstract: The Emergence Proposal claims that in Quantum Gravity the kinetic terms of the fields in the IR emerge from integrating out (infinite) towers of particles up to the QG cutoff. After introducing this proposal in the context of the Swampland Program\, I will explain why it is natural to identify this QG cutoff with the Species Scale\, motivating it by direct computation in the presence of the relevant towers. Then\, I will present evidence for this proposal by directly studying how it is realized in different string theory setups\, where the kinetic terms of scalars\, p-forms and even scalar potentials can be shown to emerge after integrating out such towers. \n  \n 
URL:https://cmsa.fas.harvard.edu/event/swampland_111522/
LOCATION:CMSA Room G10\, CMSA\, 20 Garden Street\, Cambridge\, MA\, 02138\, United States
CATEGORIES:Swampland Seminar
ATTACH;FMTTYPE=image/png:https://cmsa.fas.harvard.edu/media/CMSA-Swampland-Seminar-11.15.22.png
END:VEVENT
END:VCALENDAR