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Short Proofs of Linear Growth of Quantum Circuit Complexity

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arxiv 2205.05668 v1 pith:QHDG2VM2 submitted 2022-05-11 quant-ph

classification quant-ph
keywords quantumcomplexitycircuitgatesgrowthnumberproofsshort
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The complexity of a quantum gate, defined as the minimal number of elementary gates to build it, is an important concept in quantum information and computation. It is shown recently that the complexity of quantum gates built from random quantum circuits almost surely grows linearly with the number of building blocks. In this article, we provide two short proofs of this fact. We also discuss a discrete version of quantum circuit complexity growth.

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Cited by 1 Pith paper

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

  1. Growth and collapse of subsystem complexity under random unitary circuits

    quant-ph 2025-10 unverdicted novelty 7.0 of 10

    Under random brickwork circuits, regions larger than half the system have complexity growing linearly in time, while a smaller region thermalizes to essentially zero complexity by T=ℓ/2 — with holographic and replica ...

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