Bragg spectroscopic interferometer and quantum measurement-induced correlations in atomic Bose-Einstein condensates
arXiv:1204.4682 · doi:10.1088/1367-2630/14/7/073057
Abstract
We theoretically analyze the Bragg spectroscopic interferometer of two spatially separated atomic Bose-Einstein condensates that was experimentally realized by Saba et al. [Science 2005 v307 p1945] by continuously monitoring the relative phase evolution. Even though the atoms in the light-stimulated Bragg scattering interact with intense coherent laser beams, we show that the phase is created by quantum measurement-induced back-action on the homodyne photo-current of the lasers, opening possibilities for quantum-enhanced interferometric schemes. We identify two regimes of phase evolution: a running phase regime which was observed in the experiment of Saba et al., that is sensitive to an energy offset and suitable for an interferometer, and a trapped phase regime, that can be insensitive to applied forces and detrimental to interferometric applications.
14 pages, 3 figures
References in corpus (5)
- Atom Interferometers
- Exploring correlated 1D Bose gases from the superfluid to the Mott-insulator state by inelastic light scattering
- Continuous measurement feedback control of a Bose-Einstein condensate using phase contrast imaging
- Quantum non-local effects with Bose-Einstein condensates
- Homodyne detection of matter-wave fields (shortened)