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Sensing Quantum Vacuum Fluctuations with Non-Gaussian Electronic Noise.
Clovis Farley1, Edouard Pinsolle1, Bertrand Reulet1
1Université de Sherbrooke, Département de physique, Institut quantique, Sherbrooke, Québec J1K 2R1, Canada.
Physical Review Letters
|May 9, 2025
Summary
We demonstrate a novel method to measure vacuum fluctuations in quantum conductors using third-order electromagnetic field correlations. This technique overcomes limitations of traditional detection setups for precise measurements.
Area of Science:
- Quantum electronics
- Mesoscopic physics
- Quantum optics
Background:
- Electron transport in quantum conductors is sensitive to voltage bias fluctuations.
- Noise in tunnel junctions can obscure fundamental quantum phenomena.
- Vacuum fluctuations are a key aspect of quantum field theory.
Purpose of the Study:
- To experimentally demonstrate a method for measuring vacuum fluctuations.
- To utilize third-order correlations in the electromagnetic field for this measurement.
- To overcome noise limitations in detection setups.
Main Methods:
- Utilizing a tunnel junction in the microwave domain.
- Modulating junction noise with vacuum fluctuations from an ultralow temperature resistor.
- Measuring third-order correlations in the electromagnetic field.
Main Results:
- Observed the emergence of third-order correlation in the electromagnetic field.
- Successfully linked this correlation to vacuum fluctuations from the resistor.
- Showed this method isolates vacuum fluctuations from detector noise.
Conclusions:
- Third-order correlation is a viable tool for measuring vacuum fluctuations.
- This technique offers a noise-resilient approach to studying quantum transport.
- Provides a new experimental pathway to probe fundamental quantum phenomena.
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