Research
Most of my current research centers around the application of operator algebras and tensor categories to problems in quantum physics, particularly in the contexts of quantum information, quantum many-body physics and topologically ordered phases of matter. Other interests include TQFTs, higher categories, subfactors, and representation theory. I am also interested in related philosophical questions in the foundations of physics, and the relationship between mathematics and the physical world.
-My research is currently supported by NSF Grant DMS- 2247202.
-From 2019-2023, by research was supported by NSF Grant DMS-2100531 (transfer from DMS-1901082).
-Here is a link to my Google Scholar page.
Publications and Preprints:
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Universal coarse geometry of spin systems (with Ali Elokl). arXiv: 2411.07912.
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Quantum cellular automata and categorical dualities of spin chains (with Kylan Schatz and Dominic J. Williamson). arXiv: 2410.08884
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Quantum symmetries of noncommutative tori. (with David E. Evans). arXiv:2404.14466
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Levin-Wen is a gauge theory: entanglement from topology (with Kyla Kawagoe, Sean Sanford, David Green, and David Penneys). Comm. Math. Phys. arXiv:2401.13838
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Equivariant D-stability for actions of tensor categories (with Samuel Evington and Sergio Girón Pacheco). arXiv: 2401.14238
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An index for quantum cellular automata on fusion spin chains (with Junhwi Lim). Annales Henri Poincaré. arXiv:2309.10961
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Local topological order and boundary algebras (with David Penneys, Pieter Naaijkens, and Daniel Wallick). arXiv:2307.12552
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DHR bimodules of quasi-local algebras and symmetric quantum cellular automata. Accepted to Quantum Topology (special issue dedicated to Vaughan Jones) arXiv:2304.00068
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Unitary connections on Bratteli diagrams (with Paramita Das, Shamindra Ghosh, and Mainak Ghosh). Journal of Topology and Analysis (2023). arXiv:2211.03822
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Composing topological domain walls and anyon mobility (with Peter Huston, Fiona Burnell, and David Penneys). SciPost Physics (2023). arXiv:2208.14018
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K-theoretic classification of inductive limit actions of fusion categories on AF-algebras. (with Quan Chen and Roberto Hernández Palomares). Comm. Math. Phys. arXiv:2207.11854
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Equivariant fusion subcategories. (with César Galindo). Transformation Groups (2024). arXiv:2111.09116
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A categorical Connes' 𝛘(M) (with Quan Chen and David Penneys). Math. Ann. (2023). arXiv:2111.06378
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Q-system completion for C* 2-categories (with Quan Chen, Roberto Hernández Palomares and David Penneys). J. Funct. Anal. (2022). arxiv:2105.12010
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Remarks on anomalous symmetries of C*-algebras. Comm. Math. Phys. (2021). arxiv:2011.13898
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A 3-categorical perspective on G-crossed braided categories (with David Penneys and David Reutter). J. London Math. Soc. (2023). arxiv:2009.00405
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Triangle presentations and tilting modules for SL2k+1. J. Comb. Algebra. (2021). arxiv:2005.07172
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Extension theory for braided-enriched fusion categories (with Scott Morrison, David Penneys, and Julia Plavnik). Int. Math. Res. Not. (2022). arxiv:1910.03178
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Computing fusion rules for spherical G-extensions of fusion categories (with Marcel Bischoff). Selecta Math (2022). arxiv:1909.02816
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Rank-finiteness for G-crossed braided fusion categories (with Scott Morrison, Eric C. Rowell, and Dmitri Nikshych). Transform. Groups. (2020). arxiv:1902.06165
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Spontaneous symmetry breaking from anyon condensation (with Marcel Bischoff, Yuan-Ming Lu, and David Penneys). J. High Energ. Phys. (2019). arxiv:1811.00434
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Fusing binary interface defects in topological phases: the Vec(Z/pZ) case (with Daniel Barter and Jacob C. Bridgeman). J. Math. Phys. (2019). arxiv: 1810.09469
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Domain walls in topological phases and the Brauer-Picard ring for Vec(Z/pZ) (with Daniel Barter and Jacob C. Bridgeman). Comm. Math. Phys. (2019). arxiv: 1806.01279
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Vanishing of categorical obstructions for permutation orbifolds (with Terry Gannon). Comm. Math. Phys. (2019). arXiv:1804.08343
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Free oriented extensions of subfactor planar algebras (with Shamindra Kumar Ghosh and Madhav B. Reddy). Internat. J. of Math. (2018). arXiv:1805.08971
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Annular representations of free product categories (with Shamindra Kumar Ghosh and Madhav B. Reddy). J. Noncommut. Geom. (2020). arxiv:1803.06817
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Fusion rules for Z/2Z permutation gauging (with Cain Edie-Michell and Julia Plavnik). J. Math Phys. (2019). arXiv:1804.01657
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Q-systems and compact W*-algebra objects (with David Penneys), Contemporary Mathematics series. arXiv:1707.02155
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Realizations of algebra objects and discrete subfactors (with David Penneys). Adv. Math. (2019). arXiv:1704.02035
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Operator algebras in rigid C*-tensor categories (with David Penneys). Comm. Math. Phys. (2017). arxiv: 1611.04620
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Classification of Thurston-relation subfactor planar algebras (with Zhengwei Liu and Yunxiang Ren). Quantum Topol. (2019). arxiv:1606.00779
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Eigenvalues of rotations and braids in spherical fusion categories (with Daniel Barter and Henry Tucker). J. Algebra (2018). arxiv:1611.00071
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Quantum G2 categories have property (T). Internat. J. Math. (2016). arXiv: 1504.08338
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Annular representation theory for rigid C*-tensor categories (with Shamindra Kumar Ghosh). J. Funct. Anal. (2016). arXiv:1502.06543
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Discrete homotopy theory and critical values of metric space (with Jim Conant, Victoria Cur- nutte, Conrad Plaut, Kristen Pueschel, Maria Lusby, and Jay Wilkins). Fund. Math. (2014). arXiv:1205.2925
Recorded Talks:
Here are links to recordings of talks I've given at some workshops/conferences:
1). Topological invariants of symmetric quantum cellular automata, BIRS, Banff, CA (video)
2). Quantum cellular automata on fusion categorical spin chains, ICMS Edinburgh, UK (video)
3). K-theoretic classification of inductive limit actions of fusion categories on AF-algebras, HIM Bonn, DE (video)
4). A survey of G-crossed braided fusion categories, Simons Center for Geometry and Physics, Stony Brook, NY (video)
5). Spontaneous symmetry breaking from anyon condensation, BIRS, Banff CA (video)
6). Operator Algebras in Rigid C*-tensor Categories, Isaac Newton Institute, Cambridge, UK (video)
PhD Students:
Sean Thompson
Ali Elokl
Alex Betz
Noah Lanier