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Geometry of Complexity in Conformal Field Theory

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arxiv 2005.02415 v3 pith:4ETEYUOY submitted 2020-05-05 hep-th quant-ph

Geometry of Complexity in Conformal Field Theory

classification hep-th quant-ph
keywords complexitycircuitsconformalcasediscussequationsfieldgeometry
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We initiate quantitative studies of complexity in (1+1)-dimensional conformal field theories with a view that they provide the simplest setting to find a gravity dual to complexity. Our work pursues a geometric understanding of complexity of conformal transformations and embeds Fubini-Study state complexity and direct counting of stress tensor insertion in the relevant circuits in a unified mathematical language. In the former case, we iteratively solve the emerging integro-differential equation for sample optimal circuits and discuss the sectional curvature of the underlying geometry. In the latter case, we recognize that optimal circuits are governed by Euler-Arnold type equations and discuss relevant results for three well-known equations of this type in the context of complexity.

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  1. The Geometry of Quantum Complexity in Open Systems

    quant-ph 2026-07 accept novelty 7.0

    Nielsen complexity for Lindbladian open systems induces a sub-Finslerian geometry on mixed states whose flag curvature depends on control penalty factors.