Multidimensional matter-wave beam splitters based on multiphoton hyperfine Raman transitions

Pei-Chen Kuan^1*

¹Department of Physics, National Cheng Kung University, Tainan, Taiwan

* Presenter:Pei-Chen Kuan, email:pckuan@phys.ncku.edu.tw

Multidimensional beamsplitters play crucial roles in the development of multidimensional atom interferometers. Different one-dimensional beamsplitters are composited into one multidimensional beamsplitter, sharing the same external magnetic field as the quantization axis. The quantization axis defines the local interaction between the electromagnetic fields and the atoms. We studied both theoretically and experimentally the hyperfine Raman transition with different quantization axes. We found that a four-photon Raman transition can happen when the quantization axis was shifting from being parallel to perpendicular to the Raman beams' direction. Therefore, we present different configurations of multidimensional beamsplitters using both conventional two-photon Raman transitions and the discovered four-photon Raman transitions. In addition to the realization of multidimensional beamsplitters, we explored and estimated statistical and systematic errors that may occur when multiple Raman transitions are used to construct multidimensional atom interferometers with deviated quantization axes. Our results demonstrated a tradeoff between the simplicity of axis alignment relative to the beams and the required optical power. These considerations are pertinent to the future design and optimization of multidimensional atom interferometry systems.

Keywords: Atom interferometry, Raman transition, Precision measurement