Freiburg 2024 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 1: Ultra-cold Atoms, Ions and BEC I (joint session A/Q)
A 1.6: Vortrag
Montag, 11. März 2024, 12:30–12:45, HS 1010
Systematic analysis of relative phase extraction in 1D Bose gases interferometry — •Taufiq Murtadho1, Marek Gluza1, Nelly Ng1, Arifa Khatee Zatul1,2, Sebastian Erne3, and Jörg Schmiedmayer3 — 1Nanyang Technological University, Singapore — 2University of Wisconsin-Madison, Madison, USA — 3Technische Universität Wien, Vienna, Austria
Matter-wave interference upon free expansion enables spatially resolved relative phase measurements of two adjacent 1D Bose gases. However, longitudinal dynamics is typically ignored in the analysis of experimental data. We provide an analytical formula showing a correction to the readout of the relative phase due to longitudinal expansion and mixing with the symmetric phase. Furthermore, we assess the error propagation to the estimation of temperature and correlation of the gases with numerical simulation. Our analysis also incorporates experimental systematic errors such as diffraction, recoil, and shot noise from the imaging devices. This work characterizes the reliability and robustness of interferometric measurements, directing us to the improvement of existing phase extraction methods necessary to observe new physical phenomena in cold-atomic quantum simulators.
Keywords: Matter wave interference; Time of flight; Low dimensional quantum gases; Cold atoms; Quantum simulator