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This breakthrough demonstrates how advanced superconducting nanowire single-photon detectors (SNSPDs) are enabling large-scale quantum optics experiments capable of detecting gravitational time dilation over 50-kilometer fiber networks. By resolving the saturation bottleneck in heralding systems, this work paves the way for utilizing multi-photon entangled states to test fundamental theories like quantum gravity with greater precision and shorter acquisition times.
Single Quantum’s 50-km Interferometer Achieved 4.42×10⁻⁶ Rad Phase Sensitivity
Researchers used a 50-km fiber interferometer with Single Quantum’s detectors to achieve 4.42×10⁻⁶ rad phase sensitivity, resolving gravitational time dilation.
Single Quantum’s technology has enabled the successful operation of a 50-kilometer single-photon fiber interferometer, achieving a phase sensitivity of 4.42×10⁻⁶ rad RMS. This level of precision is sufficient to detect gravitational time dilation in a…
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