Optomechanical sensing of spontaneous wave-function collapse
arXiv:1405.2868 · doi:10.1103/PhysRevLett.113.020405
Abstract
Quantum experiments with nanomechanical oscillators are regarded as a testbed for hypothetical modifications of the Schrödinger equation, which predict a breakdown of the superposition principle and induce classical behavior at the macro-scale. It is generally believed that the sensitivity to these unconventional effects grows with the mass of the mechanical quantum system. Here we show that the opposite is the case for optomechanical systems in the presence of generic noise sources, such as thermal and measurement noise. We determine conditions for distinguishing these decoherence processes from possible collapse-induced decoherence in continuous optomechanical force measurements.
3 figures, revised version with extended supplemental material
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- Testing collapse models with levitated nanoparticles: the detection challenge
- Phonon counting thermometry of an ultracoherent membrane resonator near its motional ground state
- Stochastic extensions of the regularized Schrödinger-Newton equation
- Towards cavity-free ground state cooling of an acoustic-frequency silicon nitride membrane
- Probing Spontaneous Wave-Function Collapse with Entangled Levitating Nanospheres
- The direction of time and Boltzmann's time hypothesis