Optimal universal bounds for waves with varied coherence based on supremum and infimum coherence spectra
arXiv:2601.10665 · doi:10.1002/lpor.71593
Abstract
We establish a majorization-based theory for bounding observables of waves with varied coherence. For any measurement, exact bounds are attained by the maximal and minimal elements in the set of input coherence spectra. The set's supremum and infimum, which may lie outside the set, provide optimal universal bounds: any alternative spectrum yielding universal bounds produces weaker constraints. We present an algorithm to compute the supremum and infimum, and prove that they lie either at singular boundary points or strictly outside the set of coherence spectra.
19 pages, 12 figures, including appendices
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