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X-ORIGINAL-URL:https://live-hu-cmsa-222.pantheonsite.io
X-WR-CALDESC:Events for CMSA
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DTSTART;TZID=America/New_York:20261013T161500
DTEND;TZID=America/New_York:20261013T180000
DTSTAMP:20261013T134837Z
CREATED:20260729T190156Z
LAST-MODIFIED:20261013T134837Z
UID:10003989-1791908100-1791914400@live-hu-cmsa-222.pantheonsite.io
SUMMARY:From Random Walks to the Free Quantum Field
DESCRIPTION:Joint Math/CMSA Geometry and Quantum Theory Seminar \nSpeaker: Bowen Yang \nTitle: From Random Walks to the Free Quantum Field \nAbstract: The free quantum field is\, heuristically\, a Gaussian measure with density exp(−S_E) on a space of fields. We make this precise by building the Gaussian free field from discrete objects: random walks\, Brownian motion\, and the GFF on a lattice. Along the way we see why its covariance is a Green’s function\, and why in dimension two and higher it exists only as a distribution. We then pass to the continuum free field of Chatterjee’s Chapter 3 and its Markov property in time. We close with a tour of how this gives the quantum theory\, the Feynman propagator\, and the Wightman functions. \n 
URL:https://live-hu-cmsa-222.pantheonsite.io/event/quantumgeo_101326/
LOCATION:Science Center 507\, 1 Oxford Street\, Cambridge\, 02138
CATEGORIES:Geometry and Quantum Theory Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20261006T161500
DTEND;TZID=America/New_York:20261006T180000
DTSTAMP:20261002T200042Z
CREATED:20260729T190132Z
LAST-MODIFIED:20261002T200042Z
UID:10003988-1791303300-1791309600@live-hu-cmsa-222.pantheonsite.io
SUMMARY:Markov processes and path integrals continued
DESCRIPTION:Joint Math/CMSA Geometry and Quantum Theory Seminar \nSpeaker: Ahsan Khan\, HarvardCMSA \nTitle: Markov processes and path integrals continued \nAbstract: I will continue the discussion of chapter two\, in particular focusing on vacuum expectation values and reflection positivity. \n 
URL:https://live-hu-cmsa-222.pantheonsite.io/event/quantumgeo_10626/
LOCATION:Science Center 507\, 1 Oxford Street\, Cambridge\, 02138
CATEGORIES:Geometry and Quantum Theory Seminar
ATTACH;FMTTYPE=image/png:https://live-hu-cmsa-222.pantheonsite.io/media/2026/07/Geometry-and-Quantum-Theory-Seminar-10.06.26.docx-scaled.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20260929T161500
DTEND;TZID=America/New_York:20260929T180000
DTSTAMP:20260925T201009Z
CREATED:20260729T190052Z
LAST-MODIFIED:20260925T201009Z
UID:10003987-1790698500-1790704800@live-hu-cmsa-222.pantheonsite.io
SUMMARY:From Markov processes to path integrals 
DESCRIPTION:Joint Math/CMSA Geometry and Quantum Theory Seminar \nSpeaker: Tomer Schlank \nTitle: From Markov processes to path integrals \nAbstract: We will continue with Chapter 2 of the book and cover how we take the Markov process approach and Wick rotation to give a rigorous definition of path integrals. \n 
URL:https://live-hu-cmsa-222.pantheonsite.io/event/quantumgeo_92926/
LOCATION:Science Center 507\, 1 Oxford Street\, Cambridge\, 02138
CATEGORIES:Geometry and Quantum Theory Seminar
ATTACH;FMTTYPE=image/png:https://live-hu-cmsa-222.pantheonsite.io/media/2026/07/Geometry-and-Quantum-Theory-Seminar-09.29.26.docx-1-scaled.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20260922T161500
DTEND;TZID=America/New_York:20260922T180000
DTSTAMP:20260921T145448Z
CREATED:20260729T190028Z
LAST-MODIFIED:20260921T145448Z
UID:10003986-1790093700-1790100000@live-hu-cmsa-222.pantheonsite.io
SUMMARY:Geometry and Quantum Theory Seminar
DESCRIPTION:Joint Math/CMSA Geometry and Quantum Theory Seminar\n \n\nSpeaker: Dan Freed\, Harvard \nTitle: Path integral quantization of particles via probability (Part 2) \nAbstract: I will pick up where I left off last week.  The first half of the lecture will cover the general strategy of constructing a quantum system using Markov processes\, as described in Section 2.1 of Chatterjee’s book.  Then I will follow his Chapter 1 to apply it to a particle on the line with a potential. \n\n\n  \n 
URL:https://live-hu-cmsa-222.pantheonsite.io/event/quantumgeo_92226/
LOCATION:Science Center 507\, 1 Oxford Street\, Cambridge\, 02138
CATEGORIES:Geometry and Quantum Theory Seminar
ATTACH;FMTTYPE=image/png:https://live-hu-cmsa-222.pantheonsite.io/media/2026/07/Geometry-Quantum-Theory-09.22.2026-scaled.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20260915T161500
DTEND;TZID=America/New_York:20260915T180000
DTSTAMP:20260914T151425Z
CREATED:20260729T185926Z
LAST-MODIFIED:20260914T151425Z
UID:10003985-1789488900-1789495200@live-hu-cmsa-222.pantheonsite.io
SUMMARY:Path integral quantization of particles via probability
DESCRIPTION:Joint Math/CMSA Geometry and Quantum Theory Seminar \nSpeaker: Dan Freed \nTitle: Path integral quantization of particles via probability \nAbstract: This is the beginning of our study of Sourav Chatterjee’s Gauge Theory Lecture Notes\, a book-in-progress.  This lecture follows Chapter 1\, which covers the path integral quantization of a single particle.  We begin in real time with the free particle and then move on to the Wick rotated version with a potential.  The idea is to introduce probabilistic methods in this construction. \n 
URL:https://live-hu-cmsa-222.pantheonsite.io/event/quantumgeo_91526/
LOCATION:Science Center 507\, 1 Oxford Street\, Cambridge\, 02138
CATEGORIES:Geometry and Quantum Theory Seminar
ATTACH;FMTTYPE=image/png:https://live-hu-cmsa-222.pantheonsite.io/media/CMSA-Geometry-Quantum-Theory-9.15.26.docx-scaled.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20260908T161500
DTEND;TZID=America/New_York:20260908T180000
DTSTAMP:20260903T193312Z
CREATED:20260729T164815Z
LAST-MODIFIED:20260903T193312Z
UID:10003977-1788884100-1788890400@live-hu-cmsa-222.pantheonsite.io
SUMMARY:Quasi-local algebras and invertible phases of matter
DESCRIPTION:Geometry and Quantum Theory Seminar \nSpeaker: Nikita Sopenko\, CMSA \nTitle: Quasi-local algebras and invertible phases of matter \nAbstract: In the algebraic approach to quantum field theory\, observables localized in bounded regions form a net of von Neumann algebras generating what is known as a quasi-local algebra. I will discuss the classification of quasi-local algebras under a notion of equivalence that generalizes Brauer equivalence and captures only large-scale properties. I will argue that this problem coincides with the classification of invertible phases of lattice systems in one dimension higher\, providing a way to relate quantum field-theoretic and microscopic descriptions. As a byproduct\, I will describe a candidate for the generalized cohomology theory associated with invertible phases\, as conjectured by Kitaev.
URL:https://live-hu-cmsa-222.pantheonsite.io/event/quantumgeo_9826/
LOCATION:Science Center 507\, 1 Oxford Street\, Cambridge\, 02138
CATEGORIES:Geometry and Quantum Theory Seminar
ATTACH;FMTTYPE=image/png:https://live-hu-cmsa-222.pantheonsite.io/media/Geometry-and-Quantum-Theory-Seminar-09.08.26.pdf-scaled.png
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