Demonstration of traveling-wave interactions between spontaneous photon emissions and atoms in a chiral F-P cavity

• URL: http://arxiv.org/abs/2608.29515v1
• Date: Sun, 30 Aug 2026 02:35:52 GMT
• Title: Demonstration of traveling-wave interactions between spontaneous photon emissions and atoms in a chiral F-P cavity
• Abstract summary: We experimentally demonstrate traveling-wave atom-light interactions in an F-P cavity that can preserve light helicity.<n>This work paves the way for demonstrating traveling-wave atom-photon interactions in F-P cavities.
• Score: 10.38490269612254
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The enhancement of atom-photon interactions with F-P cavities provides a suitable platform for studying quantum optics and atomic physics. However, the emission fields in linear F-P cavities are in the standing-wave mode, which leads to non-uniform atom-photon coupling and a short storage lifetime of cavity-enhanced spin-wave quantum storages. This study experimentally demonstrates traveling-wave atom-light interactions in an F-P cavity that can preserve light helicity. First, a bias magnetic field is applied along the z-axis to define the quantization axis, which lifts the Zeeman degeneracy and breaks the time reversal symmetry. Next, non-classically correlated pairs of Stokes photons and spin waves are produced based on the Duan-Lukin-Cirac-Zoller scheme. The Stokes photons initially emitted from a single circularly polarized atomic transition have left-and right-hand circular polarizations when propagating along the +z (forward) and -z (backward) directions, which are preserved in the chiral cavity within the atom-photon interaction region. Thus, when the forward and backward Stokes fields resonate with the cavity, they may interact with the atoms in a traveling-wave manner. This is confirmed by measuring the time-dependent retrieval efficiencies of spin waves correlated with the forward and backward Stokes fields. This work paves the way for demonstrating traveling-wave atom-photon interactions in F-P cavities.

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