Speaker
Description
Squeezed vacuum states are a key quantum resource for continuous variable quantum computing, quantum communications, and quantum metrology since they enable measurements below the shot-noise limit. Although state-of-the-art squeezed-light sources typically rely on bulk optical parametric oscillators [1], integrated nonlinear waveguides provide a promising alternative capable of reducing system complexity, enhancing stability, and supporting scalable deployment in quantum-enhanced sensing platforms.
In this work, we demonstrate the generation of a squeezed vacuum state in a periodically poled waveguide made on a lithium niobate substrate and implement feedback control [2] to stabilize the squeezing within the frequency band relevant for quantum computation (MHz-GHz) [3] and gravitational-wave detection (10 Hz - 10 kHz). Our objective is to demonstrate the feasibility of combining integrated squeezed-light sources with active control techniques, paving the way for compact and deployable quantum-enhancement modules for next-generation computing machines and precision metrology systems [4].
References
[1] Vahlbruch H. et al., Detection of 15 dB Squeezed States of Light and their Application for the Absolute Calibration of Photoelectric Quantum Efficiency, Phys. Rev. Lett. 117, 110801(2016)
[2] Vahlbruch H, et al., Coherent control of vacuum squeezing in the gravitational-wave detection band, Phys. Rev. Lett. 97, 011101(2006)
[3] Lenzini F, et al., Integrated photonic platform for quantum information with continuous variables, Sci. Adv. 4, eaat9331(2018)
[4] Hasnaoui H. et al., Integrated waveguide sources of squeezed vacuum for gravitational wave detection and quantum metrology, Front. Sens. 6, 1603365(2025)
| Sessions | Technological aspects |
|---|---|
| Invited | No |