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MO: Fachverband Molekülphysik
MO 24: Attosecond Physics II (joint session A/MO)
MO 24.3: Talk
Thursday, March 13, 2025, 11:45–12:00, GrHS Mathe
In Search of Lost Tunneling Time — •Pablo Maier1, Serguei Patchkovskii1, Misha Ivanov1,2,3, and Olga Smirnova1,4 — 1Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Straße 2A, 12489 Berlin, Germany — 2Humboldt-Universität zu Berlin, Unter den Linden 6, 10117 Berlin, Germany — 3Solid State Institute and Physics Department, Technion, Haifa, 32000, Israel — 4Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
The measurement of tunneling times in strong-field ionization has been the topic of much controversy in recent years, with the attoclock and Larmor clock being two of the main contenders for correctly reproducing these times. By expressing the attoclock as the weak value of temporal delay, we extend its meaning beyond the traditional setup. This allows us to calculate the attoclock time for a static one-dimensional tunneling model consisting of a binding delta potential and a constant electric field. We apply the Steinberg weak-value interpretation of the Larmor clock. Using this definition, we obtain the position-resolved time density during tunnel ionization, yielding a non-zero Larmor tunneling time. Our model allows us to derive the analogue of the position-resolved attoclock tunneling time. While non-zero at the tunnel exit, it vanishes at the detector, far away from the atom. Formally, this means that the attoclock does not measure the Larmor time, but instead a time closely related to the phase time.
Keywords: Tunneling Time; Strong-Field Ionization; Attoclock; Larmor Clock; Temporal Delay