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Q: Fachverband Quantenoptik und Photonik

Q 26: Poster – Precision Measurement, Metrology, and Quantum Effects

Q 26.41: Poster

Dienstag, 11. März 2025, 14:00–16:00, Tent

Gravitational wave-Induced Photon Superradiance in Atoms — •Navdeep Arya and Magdalena Zych — Stockholm University

The effect of spacetime curvature on atoms is typically very small. However, we have recently argued that spontaneous buildup of quantum coherence enables atoms in an array to cooperate and amplify their response to gravitational waves. This cooperation manifests as gravitational wave-induced photon superradiance (delayed, intense, and directional emission of photons) with emission guided along the array and frequencies shifted by the gravitational wave frequency. Operating in a regime distinct from flat spacetime superradiance, this phenomenon allows gravitational effects to dominate the collective atomic response. The gravitational wave shapes the photon emission like a waveguide. The length of this gravitational waveguide for photons depends on the ratio of the gravitational wave to the atomic transition frequencies. The effect persists despite common experimental challenges like position disorder and partial filling. We also propose a gravitational wave sensing scheme based on these effects and show that it has broadband sensitivity. Our findings demonstrate a new coupling interface between general relativistic gravity and quantum matter under laboratory settings, enabled by coherent atom arrays.

Keywords: superradiance; coherent atom arrays; gravitational waves; general relativity and quantum theory interface; quantum optics