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Invariants in Linear Optics

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arxiv 2509.02211 v2 pith:UA4KBG3D submitted 2025-09-02 quant-ph

Invariants in Linear Optics

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keywords polynomialsfindlinearopticsstatestherecertaincircuit
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Linear optics (LO) prohibits certain transformations. In this paper, we study the conditions for a computation to be possible in LO. We find that there are finitely many polynomials such that each of these polynomials evaluates to the same value on two photonic states if and only if there is a LO circuit transforming one of these states into the other. The proof is non-constructive, so we then focus on methods to find such polynomials.

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

  1. Local controllability of heralded quantum linear optics

    quant-ph 2026-06 unverdicted novelty 5.0

    Jacobian rank analysis quantifies how heralding enlarges the locally accessible state space in photonic linear optics and identifies resources for full local controllability.