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arXiv 0712.19902007-12physics.atom-phphysics.optics

Atom Interferometry with up to 24-Photon-Momentum-Transfer Beam Splitters

Holger Mueller, Sheng-wey Chiow, Quan Long, Sven Herrmann, Steven Chu

备注：: New introduction. 4 pages, 4 figures
发表信息：: Phys. Rev. Lett. 100, 180405 (2008)
DOI：: 10.1103/PhysRevLett.100.180405

英文摘要：

We present up to 24-photon Bragg diffraction as a beam splitter in light-pulse atom interferometers to achieve the largest splitting in momentum space so far. Relative to the 2-photon processes used in the most sensitive present interferometers, these large momentum transfer beam splitters increase the phase shift 12-fold for Mach-Zehnder (MZ-) and 144-fold for Ramsey-Borde (RB-) geometries. We achieve a high visibility of the interference fringes (up to 52% for MZ or 36% for RB) and long pulse separation times that are possible only in atomic fountain setups. As the atom's internal state is not changed, important systematic effects can cancel.

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