In a study published in Nature Communications (2026), a team of researchers from ICFO (Barcelona, Spain), TU Wien (Vienna, Austria), UCL (London, UK), MBI (Berlin, Germany), and IESL-FORTH (Heraklion, Greece) presented a solution to an important emerging open problem: understanding how bright squeezed vacuum (BSV) light propagates through nonlinear media, undergoing high-harmonic generation and how this propagation influences both the generated nonlinear signals and the quantum properties of the radiation. The work, led by Paraskevas Tzallas, establishes a fully quantized theoretical framework for investigating BSV-driven nonlinear optical processes, providing a foundation for future research in nonlinear optics, strong-field quantum optics, and ultrafast science across all states of matter.

Reference:

[1] J. Rivera-Dean, D. Kanti, P. Stammer, S. Carlström, N. Tsatrafyllis, M. Yu Ivanov, M. Lewenstein, and P. Tzallas, Nature Commun., (2026). (https://www.nature.com/articles/s41467-026-75173-8 [1]).