Interference of interacting matter waves

@article{Gustavsson_2010,
	doi = {10.1088/1367-2630/12/6/065029},
  arxiv = {https://arxiv.org/abs/0812.4836},
	url = {https://doi.org/10.1088/1367-2630/12/6/065029},
	year = {2010},
	month = {jun},
	publisher = {{IOP} Publishing},
	volume = {12},
	number = {6},
	pages = {065029},
	author = {M. Gustavsson and E. Haller and M. J. Mark and J. G. Danzl and R. Hart and A. J. Daley and H.-C. Nägerl},
	title = {Interference of interacting matter waves},
	journal = {New Journal of Physics},
	abstract = {The phenomenon of matter-wave interference lies at the heart of quantum physics. It has been observed in various contexts in the limit of non-interacting particles as a single-particle effect. Here we observe and control matter-wave interference whose evolution is driven by interparticle interactions. In a multi-path matter-wave interferometer, the macroscopic many-body wave function of an interacting atomic Bose–Einstein condensate develops a regular interference pattern, allowing us to detect and directly visualize the effect of interaction-induced phase shifts. We demonstrate control over the phase evolution by inhibiting interaction-induced dephasing and by refocusing a dephased macroscopic matter wave in a spin-echo-type experiment. Our results show that interactions in a many-body system lead to a surprisingly coherent evolution, possibly enabling narrow-band and high-brightness matter-wave interferometers based on atom lasers.}
}