Quantum theory of attosecond-pulse temporal structure

Develop a comprehensive quantum-theoretical analysis of the temporal structure of attosecond pulses in strong-field quantum optics.

Background

The paper argues that existing studies have primarily addressed nonclassical properties of individual harmonic modes or mode pairs, while the collective many-mode structure of nonclassical pulse trains remains insufficiently explored. The authors present attoquants as one framework in which attosecond pulse trains can arise without conventional intermodal phase locking, but characterize the broader quantum theory of attosecond-pulse temporal structure as an unresolved task.

References

Thus, a quantum theoretical analysis of the temporal structure of attosecond pulses remains an open task in the field of strong-field quantum optics.

— A quantum optical concept of attosecond pulses: the attoquants  (2608.17854 - Varró et al., 18 Aug 2026) in Introduction, paragraph beginning “Whilst the presence of nonclassical attributes…”

Whether the resulting broad near-keV spectrum preserves sufficient phase synchronization to generate one-attosecond waveforms therefore remains an open question.

— Electron Correlation Enables Phase-Coherent One-Attosecond Pulse Trains  (2608.18773 - Marchisio et al., 19 Aug 2026) in Section 1, paragraph beginning “A cutoff extension, however, does not by itself imply the generation of shorter pulses.”