5-mg suspended mirror driven by measurement-induced back-action

Abstract

Quantum mechanics predicts superposition of position states even for macroscopic objects. Recently, the use of a quasi-freely suspended mirror combined with laser was proposed to prepare such states, by Müller-Ebhardt et al. [Phys.Rev.Lett.100, 013601 (2008)]. One of the key milestones towards this goal is the preparation of the mechanical oscillator mainly driven by quantum back-action, which identifies the connection between the object and quantumness of the light. Here, we describe development of a suspended 5-mg mirror driven by quantum back-action larger than thermal fluctuating force by a factor of 1.4$\pm$0.2 at 325 Hz,which is confirmed by using a triangular optical cavity.

4 pages, 4 figures

References in corpus (5)

• Observation of Radiation Pressure Shot Noise on a Macroscopic Object
• Decoherence of matter waves by thermal emission of radiation
• Entanglement of macroscopic test masses and the Standard Quantum Limit in laser interferometry
• Probing optomechanical correlations between two optical beams down to the quantum level
• An optically trapped mirror for reaching the standard quantum limit

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