Laser cooling of a nanomechanical oscillator into its quantum ground state

Alex Krause; Amir H. Safavi-Naeini; Jasper Chan; Jeff T. Hill; Markus Aspelmeyer; Oskar Painter; Simon Groeblacher; T. P. Mayer Alegre

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Laser cooling of a nanomechanical oscillator into its quantum ground state

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arxiv 1106.3614 v1 pith:6FUEM3ET submitted 2011-06-18 quant-ph

Jasper Chan , T. P. Mayer Alegre , Amir H. Safavi-Naeini , Jeff T. Hill , Alex Krause , Simon Groeblacher , Markus Aspelmeyer , Oskar Painter This is my paper

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A patterned Si nanobeam is formed which supports co-localized acoustic and optical resonances that are coupled via radiation pressure. Starting from a bath temperature of T=20K, the 3.68GHz nanomechanical mode is cooled into its quantum mechanical ground state utilizing optical radiation pressure. The mechanical mode displacement fluctuations, imprinted on the transmitted cooling laser beam, indicate that a final phonon mode occupancy of 0.85 +-0.04 is obtained.

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