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Q: Fachverband Quantenoptik und Photonik
Q 53: Matter Wave Interferometry II
Q 53.3: Vortrag
Donnerstag, 13. März 2025, 11:30–11:45, HS I
Squeezing Enhancement in Atom Interferometers Based on Bragg Diffraction — •Julian Günther1,2, Jan-Niclas Kirsten-Siemss2, Naceur Gaaloul2, and Klemens Hammerer1 — 1Institut für Theoretische Physik, Leibniz Universität Hannover, Germany — 2Institut für Quantenoptik, Leibniz Universität Hannover, Germany
Using entanglement for N-particle states in matter wave interferometers allows one to outperform the standard quantum limit of 1/√N for the uncertainty in the phase measurement. We consider the use of one-axis twisted, spin squeezed atomic states in a Bragg Mach-Zehnder interferometer. We evaluate the phase uncertainty in the phase measurement taking into account the fundamental multi-port and multi-path nature of the Bragg processes, and determine optimally squeezed states for a given geometry. We show, that Gaussian pulses need to be chosen carefully with respect to the squeezing strength and momentum distribution of the incoming particles to benefit from the entanglement.
This project was funded within the QuantERA II Programme that has received funding from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No 101017733 with funding organisation DFG (project number 499225223).
Keywords: Bragg Atom Interferometer; Squeezing