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Bell correlations between light and vibration at ambient conditions.
Santiago Tarrago Velez1, Vivishek Sudhir2,3, Nicolas Sangouard4,5
1Institue of Physics, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
Science Advances
|December 23, 2020
Summary
Researchers demonstrate quantum correlations, or Bell correlations, between light and molecular vibrations using spontaneous Raman scattering. These hybrid photon-phonon correlations persist for hundreds of oscillations, opening new avenues for quantum studies.
Area of Science:
- Quantum Optics
- Spectroscopy
- Condensed Matter Physics
Background:
- Time-resolved Raman spectroscopy studies molecular vibrations and optical phonons.
- Existing techniques capture vibrational coherence but not quantum correlations between light and vibrations.
- Spontaneous Raman scattering creates fragile quantum correlations.
Purpose of the Study:
- To demonstrate Bell correlations between light and collective molecular vibrations.
- To measure the decay dynamics of these hybrid photon-phonon correlations.
- To establish a universal method for generating light-vibration entanglement.
Main Methods:
- Utilized universal properties of spontaneous Raman scattering.
- Developed a scheme to generate and detect Bell correlations.
- Employed sub-picosecond time-resolved measurements.
Main Results:
- Successfully demonstrated Bell correlations between light and collective molecular vibrations.
- Measured the decay of these hybrid photon-phonon correlations.
- Observed that correlations survive for several hundred oscillations at ambient conditions.
Conclusions:
- The presented method offers a universal approach to generate entanglement between light and molecular vibrations.
- The findings pave the way for studying quantum correlations in complex molecular and solid-state systems.
- This work advances the understanding of quantum phenomena in natural states of matter.
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