A scanning cavity for large area coherent coupling in atom interferometry
Abstract
Optical cavities can enhance atom-light coupling in atom interferometry, but free-fall geometries require large transverse modes. Marginally stable resonators provide such modes, yet aberrations and alignment imperfections turn their near-degenerate response into detuning-dependent transverse ring modes, strongly limiting the usable interaction volume under static excitation. Here, we turn this limitation into a resource. By chirping the interrogation frequency across the cavity resonance while dynamically shaping the input amplitude, we map laser detuning onto the transverse position and scan the cavity-enhanced coupling across the atomic cloud. In a cavity-enhanced Bragg diffraction experiment with 87 Rb atoms, this produces a nearly uniform effective interaction region of about 15 mm and increases the transfer efficiency from about 5% to 28%. We also demonstrate phase-coherent operation of a three-pulse atom interferometer using chirped cavity-enhanced Bragg pulses. These results establish scanning-cavity interrogation as a route to large-area, cavity-enhanced atom interferometry.
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BibTeX
@misc{sabulsky2026scanning,
title = {{A scanning cavity for large area coherent coupling in atom interferometry}},
author = {D. Sabulsky and Q. Beaufils and A. Bertoldi and A. Landragin and P. Bouyer and B. Canuel},
howpublished = {HAL},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.10082},
eprint = {2610.10082},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05785209v1},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - A scanning cavity for large area coherent coupling in atom interferometry
AU - D. Sabulsky
AU - Q. Beaufils
AU - A. Bertoldi
AU - A. Landragin
AU - P. Bouyer
AU - B. Canuel
PY - 2026
DA - 2026/10/07
PB - HAL
DO - 10.48550/arxiv.2610.10082
UR - https://hal.science/hal-05785209v1
AB - Optical cavities can enhance atom-light coupling in atom interferometry, but free-fall geometries require large transverse modes. Marginally stable resonators provide such modes, yet aberrations and alignment imperfections turn their near-degenerate response into detuning-dependent transverse ring modes, strongly limiting the usable interaction volume under static excitation. Here, we turn this limitation into a resource. By chirping the interrogation frequency across the cavity resonance while dynamically shaping the input amplitude, we map laser detuning onto the transverse position and scan the cavity-enhanced coupling across the atomic cloud. In a cavity-enhanced Bragg diffraction experiment with 87 Rb atoms, this produces a nearly uniform effective interaction region of about 15 mm and increases the transfer efficiency from about 5% to 28%. We also demonstrate phase-coherent operation of a three-pulse atom interferometer using chirped cavity-enhanced Bragg pulses. These results establish scanning-cavity interrogation as a route to large-area, cavity-enhanced atom interferometry.
ER -