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Updated: Mar 27, 2026
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
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Non-classical correlations between single photons and phonons from a mechanical oscillator
Ralf Riedinger1, Sungkun Hong1, Richard A Norte2
1Vienna Center for Quantum Science and Technology (VCQ), Faculty of Physics, University of Vienna, A-1090 Vienna, Austria.
Nature
|January 19, 2016
Summary
Researchers achieved quantum correlations between single photons and phonons using a nanomechanical resonator. This demonstrates solid-state resonators as viable light-matter quantum interfaces for quantum networks and communication.
Area of Science:
- Quantum Information Science
- Quantum Optics
- Solid-State Physics
Background:
- Interfacing single photons with quantum systems is vital for quantum information science.
- Light-matter interfaces are crucial for quantum physics tests and quantum networks.
- Quantum states of matter can be manipulated and distributed using photon counting.
Purpose of the Study:
- To demonstrate non-classical correlations between single photons and phonons.
- To utilize a nanomechanical resonator as a light-matter quantum interface.
- To enable on-chip solid-state quantum applications.
Main Methods:
- Initialization of a nanomechanical resonator in its quantum ground state.
- Generation and read-out of correlated photon-phonon pairs.
- Experimental verification of quantum correlations via Cauchy-Schwarz inequality violation.
Main Results:
- Observed non-classical correlations between single photons and phonons.
- Demonstrated violation of the Cauchy-Schwarz inequality, confirming non-classical mechanical states.
- Established on-chip solid-state mechanical resonators as functional light-matter quantum interfaces.
Conclusions:
- Nanomechanical resonators serve as effective light-matter quantum interfaces.
- The achieved performance supports studies of macroscopic quantum phenomena.
- Enables applications in quantum communication, quantum memories, and quantum transducers.
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