Prediction of photon anti-bunching in HHG via the Heisenberg picture approach, claimed as the first theoretical single-photon non-classicality signature in HHG temporal correlations.
E.et al.Measuring and controlling the birth of quantum attosecond pulses.arXiv preprint arXiv:2502.09427(2025)
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Bright squeezed vacuum light enhances asymmetry in strong-field ionization photoelectron momentum distributions by orders of magnitude compared to classical fields, due to amplitude fluctuations that modify tunneling probability while leaving continuum dynamics largely unchanged.
Entangled IR photon pairs drive HHG in solids, producing harmonics up to the 10th order that exhibit photon bunching whose g(2) varies with order to track emission mechanisms and retain quantum correlations in non-degenerate cases.
Above-threshold ionization driven by bright squeezed vacuum enables tunable large-amplitude optical Schrödinger cat states via photoelectron momentum heralding, with robustness to finite resolution and Bell inequality violation.
A FROG technique employing parametric amplification is proposed and validated via numerical simulations to recover temporal mode shapes and squeezing levels of multimode ultrafast squeezed states.
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Attosecond quantum spectroscopy with entangled photon pairs
Entangled IR photon pairs drive HHG in solids, producing harmonics up to the 10th order that exhibit photon bunching whose g(2) varies with order to track emission mechanisms and retain quantum correlations in non-degenerate cases.