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quant-ph2025
Coherence and Dimensionality Witnesses for Fractional OAM Modes
A. L. S. Santos Junior, I. Prego, M. Gil de Oliveira +5
We characterize sets of fractional orbital angular momentum (OAM) modes of a light beam using unitary-invariant properties encoded by two-mode overlaps. Using basis-independent coh…
quant-ph2025
Informationally Complete Orbital Angular Momentum Tomography with Intensity Measurements
M. Gil de Oliveira, A. L. S. Santos Junior, P. M. R. Lima +4
In this work we study the tomography of the spatial structure of light. We develop a simple technique that allows one to perform the tomography over the space of fixed order modes.…
quant-ph2024
Multiplexed quantum repeaters with hot multimode alkali-noble gas memories
Alexandre Barbosa, Hugo Terças, Emmanuel Zambrini Cruzeiro
We propose a non-cryogenic optical quantum memory for noble-gas nuclear spins based on the Atomic Frequency Comb (AFC) protocol. Owing to the hours-long coherence lifetimes of the…