TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.19.1.016
TI  - Tunable anharmonicity in cavity optomechanics in the unresolved sideband regime
PY  - 2025/07/16
UR  - https://scipost.org/SciPostPhys.19.1.016
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 19
IS  - 1
SP  - 016
A1  - Wise, Jonathan
AU  - Dutreix, Clement
AU  - Pistolesi, Fabio
AB  - Introducing a controlled and strong anharmonicity in mechanical systems is a present challenge of nanomechanics. In cavity optomechanics a mechanical oscillator may be made anharmonic by ponderomotively coupling its motion to the light field of a laser-driven cavity. In the regime where the mechanical resonating frequency and the single-photon coupling constant are small compared to the decay rate of the cavity field, it turns out that the quantum electromagnetic fluctuations of the laser field drive the oscillator into a high-temperature thermal state. The motional state may however be highly non-Gaussian; we show that a precise tuning of system parameters may even lead to a purely quartic effective potential for the mechanical oscillator. We present a theory that predicts the measurable signatures left by the mechanical anharmonicity. In particular, we obtain analytically and numerically the mechanical displacement spectrum, and explore the imprints of the mechanical anharmonicity on the cavity light field.
ER  -

@Article{10.21468/SciPostPhys.19.1.016,
	title={{Tunable anharmonicity in cavity optomechanics in the unresolved sideband regime}},
	author={Jonathan L. Wise and Clement Dutreix and Fabio Pistolesi},
	journal={SciPost Phys.},
	volume={19},
	pages={016},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.19.1.016},
	url={https://scipost.org/10.21468/SciPostPhys.19.1.016},
}