Present status and future challenges of non-interferometric tests of collapse models

Abstract

The superposition principle is the cornerstone of quantum mechanics, leading to a variety of genuinely quantum effects. Whether the principle applies also to macroscopic systems or, instead, there is a progressive breakdown when moving to larger scales, is a fundamental and still open question. Spontaneous wavefunction collapse models predict the latter option, thus questioning the universality of quantum mechanics. Technological advances allow to challenge collapse models and the quantum superposition principle more and more with a variety of different experiments. Among them, non-interferometric experiments proved to be the most effective in testing these models. We provide an overview of such experiments, including cold atoms, optomechanical systems, X-rays detection, bulk heating as well as comparisons with cosmological observations. We also discuss avenues for future dedicated experiments, which aim at further testing collapse models and the validity of quantum mechanics.

References in corpus (16)

• Testing the limits of quantum mechanical superpositions
• Lower and Upper Bounds on CSL Parameters from Latent Image Formation and IGM Heating
• Matter wave lensing to picokelvin temperatures
• Optomechanical sensing of spontaneous wave-function collapse
• Collapse models with non-white noises
• Heating of trapped ultracold atoms by collapse dynamics
• Qubit-assisted thermometry of a quantum harmonic oscillator
• Testing spontaneous wave-function collapse models on classical mechanical oscillators
• Testing the foundations of quantum physics in space Interferometric and non-interferometric tests with Large Particles
• Gravity and the Collapse of the Wave Function: a Probe into Diósi-Penrose model
• Novel CSL bounds from the noise-induced radiation emission from atoms
• Testing Continuous Spontaneous Localization with Fermi liquids
• Classicalization of inflationary perturbations by collapse models in the light of BICEP2
• Constraining CSL strength parameter $\lambda$ from standard cosmology and spectral distortions of CMBR
• Generation of inflationary perturbations in the continuous spontaneous localization model: The second order power spectrum
• An Optomechanical Platform for Quantum Hypothesis Testing for Collapse Models

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• Challenging Spontaneous Quantum Collapse with XENONnT
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• Quantum foundations for quantum technologies in the International Year of Quantum (2025)
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• Diffusion Minimization via Optimal Smearing in Collapse and Hybrid Classical-Quantum Gravitational Models
• Statistical Symmetry Breaking and Emergent Colored Noise in a Stochastic Scalar-Doublet Field Theory
• Seven non-standard models coupling quantum matter and gravity
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