Abstract
We show that the interaction of a pulsed laser light with a mechanical oscillator through the radiation pressure results in an opto-mechanical entangled state in which the photon number is correlated with the oscillator position. Interestingly, the mechanical oscillator can be delocalized over a large range of positions when driven by an intense laser light. This provides a simple yet sensitive method to probe hypothetical post-quantum theories including an explicit wave function collapse model, like the Diosi & Penrose model. We propose an entanglement witness to reveal the quantum nature of this opto-mechanical state as well as an optical technique to record the decoherence of the mechanical oscillator. We also report on a detailed feasibility study giving the experimental challenges that need to be overcome in order to confirm or rule out predictions from explicit wave function collapse models.
Highlights
Post-quantum theories have been proposed which provide explicit wave function collapse models to explain how the classical world emerges from the quantum domain, see e.g. [1,2,3,4,5,6]
Before we show how to reveal this optomechanical entanglement, let us note that the mechanical position is delocalized over the range áDXMñ = x0 (1 + 2g02a2t2) on average which can be made much larger than the mechanical zero-point fluctuation x0 = even in the experimentally relevant regime, where g0t 1(g0 wm 1
The question that we address in this paragraph is how to detect the quantum nature of the optomechanical state (1)
Summary
Supplementary material for this article is available online the terms of the Creative. The mechanical oscillator can be delocalized over a large range of positions when driven by an intense laser light. This provides a simple yet sensitive method to probe hypothetical post-quantum theories including an explicit wave function collapse model, like the Diosi. We propose an entanglement witness to reveal the quantum nature of this optomechanical state as well as an optical technique to record the decoherence of the mechanical oscillator. We report on a detailed feasibility study giving the experimental challenges that need to be overcome in order to confirm or rule out predictions from explicit wave function collapse models
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