Question

What are Clifford fragments?

Answer 1

The ZX calculus is a graphical language for pure state qubit QM. It is universal, any quantum evolution can be represented by a ZX diagram. These are parameterized by angles, and various fragments of the lagnuage have been proposed. These are based on some restrictions on the angles.

The π/p-fragment consist of diagrams only made with angles multiple of π/p.

The π/2 fragment is the stabilizer QM and is not universal for QM.

The π/4 fragment is the Clifford fragment and is for Clifford QM, and is apprix. universal.

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Answer 2

Here is your answer frnd ❤️  The Zx calculus is a graphical language of a pure state qubit Qm.  .  It is universal,  any quantum evolution can be represented  by a Zx diagram . these are parameterized by an angles ,  and various fragments of the language have been proposed.   The pie /p consist of diagram only made with angles multiple of pie/p.   The pie/4 is Clifford fragments and is for Clifford Qm.,  and is approx. Universal      HOPE U LIKE IT ❤️❤️