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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
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Tunable phonon blockade in weakly nonlinear coupled mechanical resonators via Coulomb interaction
Bijita Sarma1, Amarendra K Sarma2
1Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India.
Scientific Reports
|October 3, 2018
Summary
Phonon blockade, a quantum effect, is achieved in coupled nonlinear mechanical resonators. Driving both resonators enhances control and tunability, enabling indirect measurement of phonon correlations via photon correlations.
Area of Science:
- Quantum mechanics
- Nanotechnology
- Quantum optics
Background:
- Observing quantum mechanical behavior in micro- and nanomechanical resonators is a key research area.
- Phonon blockade is a crucial mechanism for detecting the quantum nature of mechanical systems.
Purpose of the Study:
- To demonstrate phonon blockade in a system of two coupled nonlinear mechanical resonators.
- To explore the benefits of driving both resonators for enhanced control and tunability.
- To investigate indirect measurement of phonon correlations using optomechanical cavities.
Main Methods:
- Utilizing a system of two weakly nonlinear mechanical resonators coupled via Coulomb interaction.
- Implementing a dual-drive mechanism on both resonators.
- Employing radiation pressure induced coupling within an optomechanical cavity.
Main Results:
- Phonon blockade is achieved through destructive quantum interference, suppressing two-phonon excitation.
- Dual resonator driving offers improved temperature sensitivity and external tunability (amplitude and phase) compared to single-drive.
- Phonon correlations can be indirectly measured as photon correlations in an optomechanical system.
Conclusions:
- Phonon blockade is feasible in coupled nonlinear mechanical resonators.
- Dual-drive strategies significantly enhance the control and observation of quantum phenomena in mechanical resonators.
- Optomechanical systems provide a viable platform for probing quantum correlations in mechanical oscillators.
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