Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Acta Physica Hungarica A) Heavy Ion Physics

State Space Geometry of a Double-Loop Interferometer

Stefan Filipp, Yuji Hasegawa, Rudolf Loidl, Helmut Rauch

Published Nov 1, 2006• 0 citations
Publisher
DOI
10.1556/aph.26.2006.1-2.20

Related papers

Coherent State in an Interferometer

Ray LaPierre

Undergraduate texts in physics•Jan 1, 2022•0 citations

Correlations, visibilities and Wigner functions in a double-loop neutron interferometer

Martin Suda

In a double-loop neutron interferometer two and three beams are superposed behind the first and second loop respectively. The wavefunctions in different arms of the interferometer are discussed using wavepackets. Various correlations can be defined. Both the momentum and the space distributions which are influenced by phase shifters are calculated. Those distributions are marginal distributions of the corresponding Wigner functions. While the momentum distribution can be measured by means of post-selection, the space distribution is directly accessible via the visibility which is expressed by an appropriate correlation function. It is shown that the space distribution behind the first loop can be represented by the visibility which can be determined by measuring neutron intensities behind the second loop.

Journal of Optics B Quantum and Semiclassical Optics•Jun 1, 2003•0 citations

Interferometry and Quantum Geometry

Craig J. Hogan

•Jul 1, 2012•0 citations

Geometry of the Quantum States of Light in a Mach-Zehnder Interferometer

Alejandro Romero-Osnaya

A geometric approach to the quantum states of light that is injected into a Mach- Zehnder interferometer is discussed. It is based on the Jordan-Schwinger representation of angular momentum and permits the identification of the photon states with cones in the threedimensional space that are rotated by the action of the optical devices. Some cases of the evolution loops, dynamical processes for which any state evolves cyclically, are presented.

Journal of Physics Conference Series•Mar 1, 2016•1 citation

Four-Plate Interferometry in Phase-Space

Springer eBooks•Dec 18, 2005•0 citations

Proof-of-principle demonstration of vertical-gravity-gradient measurement using a single-proof-mass double-loop atom interferometer

Isadora Perrin, Yannick Bidel, Nassim Zahzam +3 more

We demonstrate a proof-of-principle of direct Earth gravity-gradient measurement with an atom interferometer-based gravity gradiometer using a single proof mass of cold $^{87}\mathrm{Rb}$ atoms. The atomic gradiometer is implemented in the so-called double-loop configuration, hence providing a direct gravity-gradient dependent phase shift insensitive to dc acceleration and constant rotation rate. The atom interferometer (AI) can be either operated as a gravimeter or a gradiometer by simply adding an extra Raman $\ensuremath{\pi}$ pulse. We demonstrate gravity-gradient measurements first using a vibration isolation platform and second without seismic isolation using the correlation between the AI signal and the vibration signal measured by an auxilliary classical accelerometer allowing one to bypass the absence of common-mode vibration noise rejection in a double-loop geometry. The simplicity of the experimental setup (a single atomic source and unique detection) and the immunity of the AI to rotation-induced contrast loss make it a possible candidate for onboard gravity-gradient measurements.

arXiv:1810.06042•Physical Review A•Jan 2, 2019•22 citations
In a double-loop neutron interferometer two and three beams are superposed behind the first and second loop respectively. The wavefunctions in different arms of the interferometer are discussed using wavepackets. Various correlations can be defined. Both the momentum and the space distributions which are influenced by phase shifters are calculated. Those distributions are marginal distributions of the corresponding Wigner functions. While the momentum distribution can be measured by means of post-selection, the space distribution is directly accessible via the visibility which is expressed by an appropriate correlation function. It is shown that the space distribution behind the first loop can be represented by the visibility which can be determined by measuring neutron intensities behind the second loop.
We demonstrate a proof-of-principle of direct Earth gravity-gradient measurement with an atom interferometer-based gravity gradiometer using a single proof mass of cold 87Rb^{87}\mathrm{Rb}87Rb atoms. The atomic gradiometer is implemented in the so-called double-loop configuration, hence providing a direct gravity-gradient dependent phase shift insensitive to dc acceleration and constant rotation rate. The atom interferometer (AI) can be either operated as a gravimeter or a gradiometer by simply adding an extra Raman $\ensuremath{\pi}$ pulse. We demonstrate gravity-gradient measurements first using a vibration isolation platform and second without seismic isolation using the correlation between the AI signal and the vibration signal measured by an auxilliary classical accelerometer allowing one to bypass the absence of common-mode vibration noise rejection in a double-loop geometry. The simplicity of the experimental setup (a single atomic source and unique detection) and the immunity of the AI to rotation-induced contrast loss make it a possible candidate for onboard gravity-gradient measurements.