SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 58: Quantum Optics with Photons I
Q 58.3: Vortrag
Donnerstag, 9. März 2023, 15:00–15:15, F442
Optical quantum tomography in the time domain — •Emanuel Hubenschmid1, Thiago Guedes2, and Guido Burkard1 — 1Universität Konstanz, 78467 Konstanz, Deutschland — 2Forschungszentrum Jülich, 52428 Jülich, Deutschland
Electro-optic sampling presents a powerful tool to sample the waveform of a mid-infrared pulse in the time domain by measuring the effect a nonlinear interaction of the sampled mid-infrared pulse has on an ultrabroadband near-infrared pulse. Recent experiments applied this technique to sample the electric field fluctuation of the squeezed vacuum [Nature 541, 376 (2017)] on a sub-cycle scale. However, a full quantum tomography scheme in the time domain is still missing. Here we present a theoretical description of a possible electro-optic-based quantum tomography scheme with sub-cycle resolution. By combining novel theoretical tools to describe the interaction of the sampled pulse and an ultrabroadband near-infrared pump pulse in the nonlinear crystal [Phys. Rev. D 105, 056023 (2022)] and of quantum tomography with continuous wave-driven electro-optic sampling [Phys. Rev. A 106, 043713 (2022)], we calculate the probability distribution of our tomography schemes signal depending on the time delay between the sample and near-infrared pulse. Furthermore, we analyze the noise of the signal and describe how to reduce the contribution due to the broadness of the pump pulse. Combining these results, we describe how to reconstruct an arbitrary quantum state and its waveform, without any post-processing in the frequency domain and thereby paving the way towards quantum tomography in the time domain.