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Entanglement-Enhanced Quantum Nano-Vibrometry
Colin P. Lualdi, Joshua Rapp, Spencer J. Johnson, Michael Vayninger, Paul G. Kwiat·December 5, 2025
Quantum Physics
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Abstract
The study of dynamic systems at the nanometer scale can benefit from the loss and background resilience offered by quantum two-photon interference. However, fast measurements with the required resolution are difficult to realize. As a solution, we introduce extreme energy entanglement between the photons undergoing interference. Using a flux probing analysis technique, we recover vibrational signals with frequencies as high as 21 kHz. Along with validating nanometer-scale precision and accuracy, we observe a significant quantum advantage when measuring in the presence of loss and background.