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The Complexity Geometry of a Single Qubit

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arxiv 1903.12621 v2 pith:7MZZ7GOZ submitted 2019-03-29 hep-th

The Complexity Geometry of a Single Qubit

classification hep-th
keywords complexitygeometrycomputationalenoughqubitsingleapproachattractive
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The computational complexity of a quantum state quantifies how hard it is to make. `Complexity geometry', first proposed by Nielsen, is an approach to defining computational complexity using the tools of differential geometry. Here we demonstrate many of the attractive features of complexity geometry using the example of a single qubit, which turns out to be rich enough to be illustrative but simple enough to be illuminating.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  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.

  2. Nielsen complexity with multiple cost factors

    quant-ph 2026-06 unverdicted novelty 4.0

    Generalizes Nielsen complexity to multiple cost factors, derives modified Euler-Arnold and Jacobi equations, and examines effects on conjugate points in single-qubit and SYK systems.