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Automorphism in Gauge Theory and Clifford-Hierarchy Stabilizer Codes
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Automorphism in Gauge Theory and Clifford-Hierarchy Stabilizer Codes

73 MIN · EN · STATUS: [ STREAMING ]
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Ryohei Kobayashi, speaking in the Institute for Advanced Study's High Energy Theory Seminar, argues that quantum error-correcting codes can escape a long-standing limitation on their logical gates by moving beyond ordinary Pauli stabilizer codes. He opens with the Bravyi-Konig bound, which forces any transversal non-Clifford gate in a Pauli stabilizer code, such as a surface or color code, to require three spatial dimensions if the code is to support universal computation. Kobayashi then introduces what he calls Clifford-hierarchy stabilizer codes, a broader non-Pauli class, and presents constructions where a 2D version admits a transversal T gate and a 3D non-Clifford version admits a transversal square-root-of-T gate. He connects these transversal gates to automorphism symmetries of twisted gauge theory and shows the resulting codes realize non-Abelian topological order. The talk is aimed at researchers in quantum information and mathematical physics already familiar with stabilizer formalism and topological order, walking through the gauge-theoretic reasoning behind each construction.

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Lecture facts

Runtime compared with the other 148 Computer Science lectures
Runtime1 h 13 m
Compared with Computer ScienceShorter than 51%
Source channelInstitute for Advanced Study (YouTube)