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This research demonstrates a novel method for engineering single-atom light-emitting antennas that achieve strong coupling in free space without traditional optical cavities or waveguides. By utilizing an atom's center-of-mass wavefunction, the study overcomes conventional cooperativity limits and enhances efficient light-matter interactions for streamlined quantum systems. This advancement represents a significant step toward scalable quantum technologies reliant on direct free-space photon emission.
Single Atom Emits Light with Cooperativity Matching Current Technology
Conventional single-atom cooperativity is limited to values less than or equal to 3/2π². However, calculations now demonstrate that engineering an antenna using just one atom’s motion could yield coupling strengths comparable with complex optical setups. This establishes a novel pathway to access strong-coupling quantum optics directly in free space without relying on cavities or waveguides.
A new method for engineering light-emitting antennas uses the motion of single atoms, enabling strong coupling to free space without traditional optical cavities or waveguides. Constructing an antenna from the centre-of-mass wavefunction of one atom produces directed emission that circumvents limitations caused by atomic recoil. This approach sharply enhances cooperative scattering and enables novel quantum technologies reliant on efficient light-matter interactions. Single atoms are engineered as light-emitting structures, circumventing conventional optical components…
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