SAMOP 2023 – scientific programme

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SYAS: Awards Symposium

SYAS 1: Award Symposium

SYAS 1.3: Prize Talk

Tuesday, March 7, 2023, 15:35–16:05, E415

Amplitude, Phase and Entanglement in Strong Field Ionization — •Sebastian Eckart — Institut für Kernphysik, Max-von-Laue-Str. 1, 60438 Frankfurt am Main — Laureate of the Gustav-Hertz-Prize 2023

We report on experiments with highly intense femtosecond laser pulses with tailored polarization. The electric field of the laser bends the atomic potential and leads to tunnel ionization of single atoms and molecules. The momenta of the liberated electrons and the ions are measured in coincidence using cold-target recoil-ion momentum spectroscopy (COLTRIMS) reaction microscopes.

We explore properties of the amplitude [1] and the phase [2] of the wave function of the liberated electron. For example, this allows us to measure the Wigner time delay of the electron which is liberated from molecular hydrogen as a function of the electron’s emission direction with respect to the molecular axis. Moreover, we prepare two spatially separated atoms from a single oxygen molecule. We probe this pair of atoms on femtosecond time scales and show that the valence electrons of the two atoms are entangled [5].

References:

[1] S. Eckart et al. Nat. Phys. 14, 701 (2018)

[2] S. Eckart et al. Phys. Rev. Lett. 121, 163202 (2018)

[3] S. Eckart, Phys. Rev. Research 2, 033248 (2020)

[4] D. Trabert et al. Nat. Commun. 12, 1697 (2021)

[5] S. Eckart et al. arXiv:2108.10426