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Q: Fachverband Quantenoptik und Photonik
Q 59: Poster IV
Q 59.6: Poster
Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof
T4-Atom Interferometer Sensitive to Angular Acceleration — •Bernd Konrad and Maxim Efremov — German Aerospace Center (DLR), Institute of Quantum Technologies, 89081 Ulm, Germany
Nowadays, matter-wave interferometry has become a powerful technique for measuring acceleration, gravity gradient, and constant rotation with enormous precision [1]. Here, we explore atom interferometer which is highly sensitive to unknown constant angular acceleration Ω. By modeling rotation with fixed axis and constant angular acceleration with time-dependent angular velocity Ω→(t) = ( Ω0 + Ω t )eΩ→, where Ω0 is its initial value, we employ atom-interferometric scheme based on a sequence π/2−π−π−π−π/2 of five Raman laser pulses [2]. For a small enough Ω0, we have found that the interferometer has a very high contrast, C ≈ 1 , more precisely it is reduced only by a correction scaling with the sixth order of Ω0, that is C = 1 + O( Ω06 ). On the other hand, the leading term of the interferometer phase is linearly proportional to the angular acceleration Ω and scales as T4, namely ϕ ∝ Ω T4 + O( Ω03 ), where T is the total interferometer time. In addition, we have investigated the feasibility of the proposed scheme for the typical ground- and space-based configurations, such as a rotating platform on earth and satellites.
[1] G.M. Tino and M.A. Kasevich (Eds.), Atom Interferometry (IOS Press, Amsterdam, 2014)
[2] K.-P. Marzlin and J. Audretsch, Phys. Rev. A 53, 312 (1996)