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arXiv:1412.2713 · Experimental Astronomy

Design of a dual species atom interferometer for space

Thilo Schuldt, Christian Schubert, Markus Krutzik, Lluis Gesa Bote, Naceur Gaaloul, Jonas Hartwig, Holger Ahlers, Waldemar Herr, Katerine Posso-Trujillo, Jan Rudolph, Stephan Seidel, Thijs Wendrich, Wolfgang Ertmer, Sven Herrmann, André Kubelka-Lange, Alexander Milke, Benny Rievers, Emanuele Rocco, Andrew Hinton, Kai Bongs, Markus Oswald, Matthias Franz, Matthias Hauth, Achim Peters, Ahmad Bawamia, Andreas Wicht, Baptiste Battelier, Andréa D Bertoldi, Philippe Bouyer, Arnaud Landragin, Didier Massonnet, Thomas Lévèque, André Wenzlawski, Ortwin Hellmig, Patrick Windpassinger, Klaus Sengstock, Wolf von Klitzing, Chris Chaloner, David Summers, Philip Ireland, Ignacio Mateos, Carlos F. Sopuerta, Fiodor Sorrentino, Guglielmo M. Tino, Michael Williams, Christian Trenkel, Domenico Gerardi, Michael Chwalla, Johannes Burkhardt, Ulrich Johann, Astrid Heske, Eric Wille, Martin Gehler, L. Cacciapuoti, Norman Gürlebeck, Claus Braxmaier, Ernst Maria Rasel

Published Mar 7, 2015• 66 citations

DOI: 10.1007/s10686-014-9433-y

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The wave-front aberration of Raman beams induces phase noise in atom interferometers and thus limits the performance of atom interferometers. We theoretically analyze the wave-front-aberration phase noise in weak-equivalence-principle tests using dual-species atom interferometers, and propose an expansion-rate-selection method to suppress the wave-front-aberration phase noise in both isotopic and nonisotopic atom interferometers. The suppression ratio is about 10 at the expense of half the number of atoms. The simulation based on appropriate experimental parameters shows that the wave-front aberration caused standard deviations to the E\"otv\"os coefficient in weak-equivalence-principle tests using $^{85}\mathrm{Rb}\text{\ensuremath{-}}^{87}\mathrm{Rb}$ and $^{41}\mathrm{K}\text{\ensuremath{-}}^{87}\mathrm{Rb}$ are $1.3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}14}$ and $3.0\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}13}$. Better results can be obtained by improving the wave-front quality and utilizing atom cloud with lower temperature. The analysis and suppression of wave-front-aberration phase noise will be useful for the design of high-precision atom interferometer--based weak-equivalence-principle tests both on ground and in space.