TY - JOUR

T1 - Atomic Raman scattering

T2 - Third-order diffraction in a double geometry

AU - Hartmann, Sabrina

AU - Jenewein, Jens

AU - Abend, Sven

AU - Roura, Albert

AU - Giese, Enno

N1 - Funding Information: We thank M. Gebbe, M. Gersemann, C. M. Carmesin, A. Friedrich, and the whole QUANTUS group in Ulm as well as our partners of the QUANTUS collaboration for fruitful discussions, as well as J.-N. Siemß for helpful comments on our manuscript. This work is supported by the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) with funds provided by the Federal Ministry for Economic Affairs and Energy (Bundesministerium für Wirtschaft und Energie, BMWi) due to an enactment of the German Bundestag under Grants No. DLR 50WM1556 (QUANTUS IV), DLR 50WM1956 (QUANTUS V), DLR 50WP1700 and 50WP1705 (BECCAL), and 50RK1957 (QGYRO) as well as the Association of German Engineers (Verein Deutscher Ingenieure, VDI) with funds provided by the Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung, BMBF) under Grant No. VDI 13N14838 (TAIOL). E.G. thanks the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) for a Mercator Fellowship within CRC 1227 (DQ-mat). We thank the Ministry of Science, Research and Art Baden-Württemberg (Ministerium für Wissenschaft, Forschung und Kunst Baden-Württemberg) for financially supporting the work of .

PY - 2020/12/22

Y1 - 2020/12/22

N2 - In a retroreflective scheme with an atom initially at rest, atomic Raman diffraction adopts some of the properties of Bragg diffraction due to additional couplings to off-resonant momenta. As a consequence, double Raman diffraction has to be performed in a Bragg-type regime, where the pulse duration is sufficiently long to suppress diffraction into spurious orders. Taking advantage of this regime, double Raman allows for resonant higher-order diffraction. We study theoretically the case of third-order diffraction and compare it to first order as well as a sequence of first-order Raman pulses giving rise to the same momentum transfer as the third-order pulse. Moreover, we demonstrate that interferometry is possible, and we investigate amplitude and contrast of a third-order double Raman Mach-Zehnder interferometer. In fact, third-order diffraction constitutes a competitive tool for the diffraction of ultracold atoms and interferometry based on large momentum transfer since it allows one to reduce the complexity of the experiment as well as the total duration of the diffraction process compared to a sequence, at the cost of higher pulse intensities.

AB - In a retroreflective scheme with an atom initially at rest, atomic Raman diffraction adopts some of the properties of Bragg diffraction due to additional couplings to off-resonant momenta. As a consequence, double Raman diffraction has to be performed in a Bragg-type regime, where the pulse duration is sufficiently long to suppress diffraction into spurious orders. Taking advantage of this regime, double Raman allows for resonant higher-order diffraction. We study theoretically the case of third-order diffraction and compare it to first order as well as a sequence of first-order Raman pulses giving rise to the same momentum transfer as the third-order pulse. Moreover, we demonstrate that interferometry is possible, and we investigate amplitude and contrast of a third-order double Raman Mach-Zehnder interferometer. In fact, third-order diffraction constitutes a competitive tool for the diffraction of ultracold atoms and interferometry based on large momentum transfer since it allows one to reduce the complexity of the experiment as well as the total duration of the diffraction process compared to a sequence, at the cost of higher pulse intensities.

UR - http://www.scopus.com/inward/record.url?scp=85098567540&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.102.063326

DO - 10.1103/PhysRevA.102.063326

M3 - Article

AN - SCOPUS:85098567540

VL - 102

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

IS - 6

M1 - 063326

ER -