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Strong indirect coupling between graphene-based mechanical resonators via a phonon cavity
Gang Luo1,2, Zhuo-Zhi Zhang1,2, Guang-Wei Deng3,4
1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026, Anhui, China.
Nature Communications
|January 28, 2018
Summary
Researchers demonstrated strong indirect coupling between distant mechanical resonators using a graphene-based system. This breakthrough, mediated by a phonon cavity, enables tunable interactions for future quantum information processing.
Area of Science:
- Solid State Physics
- Quantum Information Science
- Nanotechnology
Background:
- Mechanical resonators are key for information storage and manipulation.
- Previous research focused on direct coupling within single resonators or between adjacent ones.
- Coupling distant mechanical resonators is essential for long-distance information processing but remains challenging.
Purpose of the Study:
- To experimentally demonstrate strong indirect coupling between separated mechanical resonators.
- To explore the use of a graphene-based electromechanical system for this purpose.
- To investigate the mechanism of coupling mediated by a phonon cavity.
Main Methods:
- Utilizing a graphene-based electromechanical system.
- Employing a far-off-resonant phonon cavity to mediate coupling.
- Leveraging virtual excitations via a Raman-like process for indirect interaction.
- Tuning the coupling strength by adjusting the phonon cavity's resonant frequency.
Main Results:
- Experimental observation of strong indirect coupling between spatially separated mechanical resonators.
- Demonstration of tunable coupling strength over a wide range by controlling the phonon cavity frequency.
- Validation of the phonon cavity-mediated interaction mechanism.
Conclusions:
- The study successfully achieved strong indirect coupling between distant mechanical resonators.
- This method offers a new pathway for controlling interactions in mechanical systems.
- The findings pave the way for gate-controlled all-mechanical devices and long-distance quantum experiments.
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