Multilayer test masses to enhance the collapse noise

Abstract

Recently, a non-thermal excess noise, compatible with the theoretical prediction provided by collapse models, was measured in a millikelvin nanomechanical cantilever experiment [Vinante et al., Phys. Rev. Lett. 119, 110401 (2017)]. We propose a feasible implementation of the cantilever experiment able to probe such a noise. The proposed modification, completely within the grasp of current technology and readily implementable also in other type of mechanical non-interferometric experiments, consists in substituting the homogeneous test mass with one composed of different layers of different materials. This will enhance the action of a possible collapse noise above that given by standard noise sources.

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• Testing the foundations of quantum physics in space Interferometric and non-interferometric tests with Large Particles
• Testing Continuous Spontaneous Localization with Fermi liquids
• Integrated optical-readout of a high-Q mechanical out-of-plane mode
• Collapse models: main properties and the state of art of the experimental tests
• Nanomechanical test of quantum linearity
• Active-feedback quantum control of an integrated low-frequency mechanical resonator
• Testing spontaneous collapse through bulk heating experiments: estimate of the background noise
• Improved bounds on collapse models from rotational noise of LISA Pathfinder
• CSL reduction rate for rigid bodies
• Non-interferometric rotational test of the Continuous Spontaneous Localisation model: enhancement of the collapse noise through shape optimisation
• Opto-mechanical tests of collapse models
• The Continuous Spontaneous Localization Layering Effect from a Lattice Perspective
• Two invariant surface-tensors determine CSL of massive body wave function
• Classifying deviation from standard quantum behavior using Kullback Leibler divergence
• New avenues for testing collapse models