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The European Physical Journal D

Geometric phase shift sensitivity in an area chirped array of atom interferometers

John R. E. Toland, Christian Campo, Tabitha Rivera, Karina Sandoval-Sanchez

Published Feb 1, 2020• 0 citations
Publisher
DOI
10.1140/epjd/e2019-90436-2

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The utilization of atom interferometry for gyroscopes is of considerable interest because the detection of inertial rotations via the Sagnac effect has a potential ${10}^{10}$ greater sensitivity than optical gyroscopes. Here we analyze, in the presence of a rotation $\ensuremath{\Omega}$, phase-coherent transport of atomic matter waves in a one-dimensional chain of $N$ ring interferometers in which the sizes of the rings are chirped symmetrically about the center ring. The gyroscope scale factor of the area-chirped array for $N\ensuremath{\lesssim}10$ is several orders of magnitude larger than that for the unchirped array, which itself is larger than the scale factor of a Mach-Zehnder interferometer with the same enclosed area. This enhancement is achieved with total enclosed areas that are larger or smaller than that of the unchirped array by less than 25$%$. As such, the area chirp achieves rotation sensitivities with $N\ensuremath{\lesssim}10$ interferometers that would normally require $N\ensuremath{\gg}100$ rings of identical sizes.

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Exact phase shifts for atom interferometry

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The utilization of atom interferometry for gyroscopes is of considerable interest because the detection of inertial rotations via the Sagnac effect has a potential 1010{10}^{10}1010 greater sensitivity than optical gyroscopes. Here we analyze, in the presence of a rotation $\ensuremath{\Omega}$, phase-coherent transport of atomic matter waves in a one-dimensional chain of NNN ring interferometers in which the sizes of the rings are chirped symmetrically about the center ring. The gyroscope scale factor of the area-chirped array for $N\ensuremath{\lesssim}10$ is several orders of magnitude larger than that for the unchirped array, which itself is larger than the scale factor of a Mach-Zehnder interferometer with the same enclosed area. This enhancement is achieved with total enclosed areas that are larger or smaller than that of the unchirped array by less than 25%. As such, the area chirp achieves rotation sensitivities with $N\ensuremath{\lesssim}10$ interferometers that would normally require $N\ensuremath{\gg}100$ rings of identical sizes.