Quantum

Fundamental limits on photonic state preparation from phase-space majorization

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 30/10/2026, 06:43:24 UTC.

Briefings

A 2026 arXiv preprint establishes fundamental bounds on converting simpler to complex quantum light states using phase-space majorization. The study defines weak, fully relative majorization to compare disorder in Wigner functions across multimode photonic systems. It derives rigorous no-go results and tradeoff relations for exact and approximate conversions involving squeezed, cat, and Fock states, demonstrating that phase-space disorder imposes strong limitations on preparation.

Key points

• The study establishes a theory of weak, fully relative majorization to compare disorder in Wigner functions across multimode photonic systems.
• Rigorous no-go results and tradeoff relations were derived for exact and approximate conversions involving squeezed, cat, and Fock states.

Context

This research provides fundamental bounds on probabilistic conversions of quantum light states, offering a versatile framework for different systems and operations. It addresses the core challenge of converting simpler states to complex ones for quantum information processing.

Limitations

The evidence is an unverified arXiv preprint from October 2026, so the findings remain untested in experimental settings. No specific city, region, or country is identified in the source, and the study does not report on public consequences or operational impact.

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