2016/03/29 by J. Küber, Küber, Johannes, F. Schmaltz +3 · 2 citations
Physics and Astronomy · Engineering · #Cold Atom Physics and Bose-Einstein Condensates #Strong Light-Matter Interactions #Semiconductor Lasers and Optical Devices
paper · pdf · doi:10.48550/arxiv.1603.08826
We present the experimental implementation of double Bragg diffraction of\nBose-Einstein condensates (BECs) as proposed in [E. Giese, A. Roura, G.\nTackmann, E. M. Rasel, and W. P. Schleich, Phys. Rev. A \88, 053608\n(2013)]. We excite Rabi oscillations between the three coupled momentum states\n\| 0 \ℏ k ⟩ and \| \± 2 \ℏ k ⟩. By\nselecting appropriate interaction times we generate highly efficient\nbeamsplitters and mirrors for Bose-Einstein condensates. In addition, we\ndemonstrate higher-order double Bragg diffraction and display beamsplitters\nwith up to \± 6 \ℏ k momentum transfer. We compare double Bragg\ndiffraction to several other experimental realizations of beamsplitters.\nFinally, we show that double Bragg diffraction is well suited for matter wave\ninterferometry by realizing a Ramsey-type interferometer in a quasi\none-dimensional waveguide.\n