2016/11/22 by Andrea Sacchetti, Sacchetti, Andrea · 1 citation
Physics and Astronomy · #81-XX #Advanced Frequency and Time Standards #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Mechanical and Optical Resonators #Quantum Gases (cond-mat.quant-gas) #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.1611.07333
openalex publication_date 2016/11/22 · openalex created_date 2022/09/27 · openalex updated_date 2026/07/28
We discuss the method for the measurement of the gravity acceleration g by\nmeans of Bloch oscillations of an accelerated BEC in an optical lattice. This\nmethod has a theoretical critical point due to the fact that the period of the\nBloch oscillations depends, in principle, on the initial shape of the BEC\nwavepacket. Here, by making use of the nearest-neighbor model for the numerical\nanalysis of the BEC wavefunction, we show that in real experiments the period\nof the Bloch oscillations does not really depend on the shape of the initial\nwavepacket and that the relative uncertainty, due to the fact that the initial\nshape of the wavepacket may be asymmetrical, is smaller than the one due to\nexperimental errors. Furthermore, we also show that the relation between the\noscillation period and the scattering length of the BEC's atoms is linear; this\nfact suggest us a new experimental procedure for the measurement of the\nscattering length of atoms.\n