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Q: Fachverband Quantenoptik und Photonik
Q 37: Quantum Optics (Miscellaneous) V
Q 37.3: Vortrag
Mittwoch, 16. März 2022, 14:45–15:00, Q-H14
Two-photon absorption spectroscopy in nonlinear interferometers — •Shahram Panahiyan1,2, Carlos Sanchez Munoz3, Maria V. Chekhova4, and Frank Schlawin1,2 — 1Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany — 3Departamento de Fisica Teorica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autonoma de Madrid, Madrid, Spain — 4Max-Planck Institute for the Science of Light, Staudtstr. 2, 91058 Erlangen, Germany
We study two-photon absorption in a nonlinear SU(1,1)-interferometer [1], where a sample is placed between two optical parametric amplifiers which are used to squeeze and (re-)un-squeeze an input state of light. The advantages of nonlinear spectroscopy with two-photon absorption and squeezed light have to compete with photon losses that can happen due to imperfect detectors or scattering originating from interaction with the sample. To address this challenge, we study the influence of photons losses. We quantify their influence by investigating the sensitivity of measurement of the expectation value of operators [2]. Furthermore, we calculate quantum and classical Fisher information and use Cramer-Rao bounds to assess the achievable sensitivity.
[1] M. V. Chekhova and Z. Y. Ou, Adv. Opt. Photon. 8, 104 (2016).
[2] C. S. Munoz, G. Frascella, and F. Schlawin, Phys. Rev. Research 3, 033250 (2021).