Quantum Enhanced Balanced Heterodyne Readout for Differential Interferometry
Aug 9, 2024·
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Daniel W. Gould
Co-author
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Vaishali B. Adya
Sheon S. Y. Chua
Jonas Junker
Dennis Wilken
Terry G. McRae
Bram J. J. Slagmolen
Min Jet Yap
Robert L. Ward
Michèle Heurs
David E. McClelland
Abstract
Conventional heterodyne readout schemes are revisited with techniques that evade the inherent 3 dB signal-to-noise penalty. By applying high-frequency, quadrature-entangled, two-mode squeezed states, this work experimentally demonstrates quantum-enhanced heterodyne readout of two spatially distinct interferometers with direct optical signal combination, showing a further signal-to-noise improvement of about 3.5 dB. The technique has implications for precision experiments including gravitational wave detection and wavelength-multiplexed quantum communication. :contentReference[oaicite:1]{index=1}
Type
Publication
Physical Review Letters