Classical squeezing of thermal fluctuations: theory vs. experiment

Classical squeezing allows manipulating the noise distribution of thermal fluctuations by suppressing the noise along one of the two quadratures. Here we show thermal squeezing of a nanomechanical resonator of ultra-high quality factor at room temperature. Squeezing is accomplished by driving the resonator in the nonlinear Duffing regime. Remarkably, the squeezing manifests itself directly in the power spectrum without the need of a homodyne measurement. Classical noise squeezing promises to...

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Engineering the output power of a one-atom laser

Hybrid systems combine elemental components with distinct tunable properties, offering a way to explore novel mechanisms of coherent energy exchange. Here, we have considered a resonator that starts to oscillate when electrons with fixed spin are injected from electrical contacts to a quantum dot, realising a highly-efficient single atom laser. We have shown that the common theoretical tool to describe the laser — the rotating-wave approximation — becomes insufficient, because a large...

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