Regensburg 2022 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 8: Quantum Sensors and Metrology
QI 8.5: Vortrag
Mittwoch, 7. September 2022, 16:15–16:30, H9
Quantum enhancement of multiphoton absorption signals in nonlinear interferometers — •Shahram Panahiyan1,2 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
SU(1,1)-interferometers are novel nonlinear interferometers [1] in which optical parametric amplifiers create quantum states of light by squeezing and anti-squeezing the light fields [2]. By taking advantage of these quantum states of light, SU(1,1)-interferometers have been employed for spectroscopy [3], imaging [4], quantum state engineering, and quantum information purposes.
Motivated by these applications, we study the precision of multiphoton absorption measurements in a nonlinear SU(1,1)-interferometer. We analyze multiphoton absorption signals, characterize the absorption as a function of nonlinear order, and derive sensitivity bounds from the Fisher Information. We show that the precision of multiphoton absorption measurements can be enhanced compared to classical measurement strategies. Finally, we highlight that this enhancement is robust against experimental imperfections in detection devices.
[1] M. V. Chekhova and Z. Y. Ou, Adv. Opt. Photon. 8, 104 (2016).
[2] S. Panahiyan, C. S. Muñoz, M. V. Chekhova, F. Schlawin, [arXiv:2205.10675].
[3] K. E. Dorfman, Light: Science & Applications 9, 123 (2020).
[4] M. Manceau et al., Phys. Rev. Lett. 119, 223604 (2017).