@article {sanders2009coherent,
	title = {Coherent scattering from a free gas},
	journal = {Physical Review A},
	volume = {79},
	year = {2009},
	pages = {023610},
	publisher = {APS},
	abstract = {We investigate decoherence in atom interferometry due to scattering from a background gas and show that the supposition that residual coherence is due to near-forward scattering is incorrect. In fact, the coherent part is completely unscattered, although it is phase shifted. This recoil-free process leaves both the atom and the gas in an unchanged state, but allows for the acquisition of a phase shift. This is essential to understanding decoherence in a separated-arm atom interferometer, where a gas of atoms forms a refractive medium for a matter wave. Our work elucidates the actual microscopic, many-body, quantum-mechanical scattering mechanism that gives rise to prior phenomenological results for the phase shift and decoherence.},
	url = {https://doi.org/10.1103/PhysRevA.79.023610},
	author = {Sanders, Scott N and Mintert, Florian and Heller, EricJ.}
}
