PennyLane
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  1. Compilation/
  2. Phase gradient

Phase gradient

OverviewState propertiesPhase gradient rotationsControl rotationsMultiplexed rotationsResources

Academic resource(s)

Explore foundational research through preprint papers, scholarly articles, and textbooks that introduce, use, and extend this technique.

Standard textbook about classical and quantum computation by Kitaev, Shen, Vyalyi.

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Improvements to quantum addition that directly improve phase gradients.

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Seminal paper on active volume, showcasing phase gradient rotations as a subroutine.

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Documentation

Implement qml.RZ rotations in PennyLane with phase gradients

Multiplexed rotations, qml.SelectPauliRot, are particularly favourable to implement with phase gradients.

qml.SemiAdder

qml.TemporaryAND, or qml.Elbow, is an important operation for efficient multicontrol/multiplexing.

Blog Post(s)

Craig Gidney discusses how to implement qml.MultiControlledX gates with linear Toffoli cost.

In the process of spoofing a quantum theory fundamentals paper, Craig Gidney explains how to copy a phase gradient.

PennyLane

PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Built by researchers, for research. Created with ❤️ by Xanadu.

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