Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 38: Poster IV

Q 38.5: Poster

Wednesday, March 13, 2024, 17:00–19:00, KG I Foyer

Progress towards a fiber-based cold atom source in the meter range — •Marcus Malki, Viet Hoang, Thomas Halfmann, and Thorsten Peters — TU Darmstadt, Darmstadt, Germany

Quantum technologies require controlled interactions with quantum systems that are otherwise isolated from the incoherent environment. In the case of neutral atoms or ions inside a vacuum system this means efficient shielding of the quantum systems from their source, which often is a hot oven. One solution to this problem is a flexible, cold source of neutral atoms.

We here report on our progress towards realizing such a source by implementing a hollow-core fiber (HCF) guide for cold ⁸⁷Rb atoms in the meter range. The guide is based on an optical dipole trap propagating through the HCF to minimize collisions of the cold atoms with the fiber wall.

We will discuss various considerations regarding the maximum guiding distance, such as background pressure inside the HCF, fiber bending radius, and parametric heating. We will also present first measurements of the HCF loading phase from atoms provided by a dark-line magneto-optical trap and discuss how the number of atoms, their temperature and velocity can be probed inside a HCF.

Keywords: quantumguide