Is there a nonzero tunneling delay in strong-field ionization? · revision history
Revision 2
Accepted · core change · record
Changes against revision 1:
- Title
- Is there a nonzero tunneling delay in strong-field ionization?
- Plain
- An attoclock uses a rotating laser field, like the hand of a clock, to time when an electron escapes an atom by tunneling. Experiments and analyses disagree on whether the escape takes a finite time or none.
- Precise · changed · core
- Revision 1: In elliptically polarized strong-field ionization of atomic hydrogen or helium, extract the tunneling delay $\tau_T$ from the photoelectron momentum offset angle after subtracting the Coulomb deflection computed from the full time-dependent Schrodinger equation, and decide whether $\tau_T = 0$ within resolution. A 2019 hydrogen experiment (Sainadh et al., Nature) reported tau_T below about $1.8e-18\,\mathrm{s}$.
- Revision 2: In elliptically polarized strong-field ionization of atomic hydrogen or helium, extract the tunneling delay $\tau_T$ from the photoelectron momentum offset angle after subtracting the Coulomb deflection computed from the full time-dependent Schrodinger equation, and decide whether $\tau_T = 0$ within resolution. A 2019 hydrogen experiment (Sainadh et al., Nature) reported $\tau_{T}$ below about $1.8 \times 10^{-18}\,\mathrm{s}$.
- Settled by
- Agreement between calibrated attoclock measurements on hydrogen at several intensities and a clock-model prediction.
- Kind
- well-posed
- Answer type
- value
- References
- (empty)
- Literature status
- contested
- Status note
- 2025 analyses (e.g. arXiv:2503.07859) continue to compare attoclock and Larmor-clock interpretations of strong-field tunneling.
- Posed since
- 2008
Decisions
- Accept · 2026-10-15 · record