Bonn 2025 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 10: Quantum Optics and Nuclear Quantum Optics I
Q 10.5: Talk
Monday, March 10, 2025, 18:15–18:30, AP-HS
Cryogenic Feedforward of a Photonic Quantum State — •Niklas Lamberty1,2, Frederik Thiele1,2, Thomas Hummel2, Nina A. Lange1,2, Lorenzo M. Procopio1,2, Aishi Barua1,2, Sebastian Lengeling3, Viktor Quiring2, Christof Eigner2, Christine Silberhorn3, and Tim J. Bartley1,2 — 1Department of Physics, Paderborn University, Warburger Str. 100, Paderborn, 33098, Germany — 2Institute for Photonic Quantum Systems (PhoQS), Paderborn University, Warburger Str. 100, Paderborn, 33098, Germany — 3Integrated Quantum Optics Group, Institute for Photonic Quantum Systems (PhoQS), Paderborn University, Warburger Str. 100, Paderborn, 33098, Germany
A wide range of quantum optical protocols require feedforward operations, entailing a partial measurement and subsequent manipulation of a quantum state. Reducing the latency between these two operations reduces the required storage time of the quantum state. By operating the measurement electronics and the modulator in the same cryogenic environment as high efficiency Superconducting Nanowire Single Photon Detectors (SNSPD), we achieve the lowest latency demonstrated so far of (23±3) ns. We use this feedforward operation to manipulate the g(2)(0) of a parametric down conversion source conditional on a photon-number measurement.
Keywords: SNSPD; Feedforward; cryogenic