Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Precision Measurements II (joint session Q/A)
Q 62.2: Vortrag
Freitag, 15. März 2024, 11:15–11:30, HS 1221
Squeezing-enhanced Bragg guided BEC interferometry — •Matthew Glaysher1, Robin Corgier2, and Naceur Gaaloul1 — 1Institut für Quantenoptik, Leibniz Universität, Hannover — 2LNE-SYRTE, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, France
Atom interferometers test fundamental theories and have practical applications such as gravimeters, gradiometers and gyroscopes. Using uncorrelated or classically correlated atomic probes, state-of-the-art devices already operate at the standard quantum limit (SQL) set by their finite baseline and/or atom number resources.
To push the boundaries of compact devices, we study the realisation of a Bose-Einstein condensate (BEC) guided interferometer based on Bragg diffraction [R. Corgier et al., PRA, 103 (2021)]. Taking advantage of the BEC oscillations in the waveguide and the possibility to tune atom-atom interactions we investigate the generation of spin-squeezing dynamics between the two modes in well-defined and well-controlled momentum states. The entangled input state feeds a second interferometer sequence with quantum-enhanced sensitivity capabilities. Realistic aspects of the state-preparation parameters, including diffraction efficiencies and BEC collisions and deformations, are addressed in our scheme.
This project was funded within the QuantERA II Programme that has received funding form the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No 101017733 with funding organisation DFG (project number 499225223).
Keywords: squeezing; Bragg; guided; BEC; quantum-enhanced sensitivity