Underground test of gravity-related wave function collapse

Abstract

Roger Penrose proposed that a spatial quantum superposition collapses as a back-reaction from spacetime, which is curved in different ways by each branch of the superposition. In this sense, one speaks of gravity-related wave function collapse. He also provided a heuristic formula to compute the decay time of the superposition $-$ similar to that suggested earlier by Lajos Diósi, hence the name Diósi-Penrose model. The collapse depends on the effective size of the mass density of particles in the superposition, and is random: this randomness shows up as a diffusion of the particles' motion, resulting, if charged, in the emission of radiation. Here, we compute the radiation emission rate, which is faint but detectable. We then report the results of a dedicated experiment at the Gran Sasso underground laboratory to measure this radiation emission rate. Our result sets a lower bound on the effective size of the mass density of nuclei, which is about three orders of magnitude larger than previous bounds. This rules out the natural parameter-free version of the Diósi-Penrose model.

66 pages, 7 figures

References in corpus (26)

• Laser cooling of a nanomechanical oscillator into its quantum ground state
• Sideband Cooling Micromechanical Motion to the Quantum Ground State
• Models of Wave-function Collapse, Underlying Theories, and Experimental Tests
• Quantum squeezing of motion in a mechanical resonator
• Remote quantum entanglement between two micromechanical oscillators
• Testing the limits of quantum mechanical superpositions
• Gravitation and quantummechanical localization of macroobjects
• Direct Measurement of Photon Recoil from a Levitated Nanoparticle
• Hanbury Brown and Twiss interferometry of single phonons from an optomechanical resonator
• The Schrödinger-Newton equation and its foundations
• \textsc{MaGe} - a {\sc Geant4}-based Monte Carlo Application Framework for Low-background Germanium Experiments
• Parametric Feedback Cooling of Levitated Optomechanics in a Parabolic Mirror Trap
• Collapse of the State Vector
• Collapse models with non-white noises
• Space-like Separation in a Bell Test assuming Gravitationally Induced Collapses
• Exploring the unification of quantum theory and general relativity with a Bose-Einstein condensate
• CSL Collapse Model Mapped with the Spontaneous Radiation
• Gravity induced wave function collapse
• LISA pathfinder appreciably constrains collapse models
• Photon emission rate from atomic systems in the CSL model
• Gravity and the Collapse of the Wave Function: a Probe into Diósi-Penrose model
• Collapse models with non-white noises II: particle-density coupled noises
• Neutron star heating constraints on wave-function collapse models
• Spontaneous photon-emission from a non-relativistic free charged particle in collapse models: A case-study
• On the spontaneous emission of electromagnetic radiation in the CSL model
• Gravity-related wave function collapse: mass density resolution

Cited by in corpus (74)

• Searching for new physics using optically levitated sensors
• Present status and future challenges of non-interferometric tests of collapse models
• Quantum gravitational decoherence from fluctuating minimal length and deformation parameter at the Planck scale
• Massive quantum systems as interfaces of quantum mechanics and gravity
• The Deep Space Quantum Link: Prospective Fundamental Physics Experiments using Long-Baseline Quantum Optics
• Gravitationally induced decoherence vs space-time diffusion: testing the quantum nature of gravity
• Testing the foundations of quantum physics in space Interferometric and non-interferometric tests with Large Particles
• Roadmap on Quantum Thermodynamics
• Collapse Models: a theoretical, experimental and philosophical review
• Gravitational Decoherence: A Thematic Overview
• Novel CSL bounds from the noise-induced radiation emission from atoms
• Gravitational decoherence of photons
• Superconducting electro-mechanics to test Diósi-Penrose effects of general relativity in massive superpositions
• Generation of entanglement from mechanical rotation
• Coupling Quantum Matter and Gravity
• Testing the nonclassicality of spacetime: what can we learn from Bell-Bose et al.-Marletto-Vedral experiments?
• Three little paradoxes: making sense of semiclassical gravity
• The weak field limit of quantum matter back-reacting on classical spacetime
• Searching for Decoherence from Quantum Gravity at the IceCube South Pole Neutrino Observatory
• Collapse dynamics are diffusive
• General quantum-classical dynamics as measurement based feedback
• Gravitational interaction through a feedback mechanism
• Tests of Quantum Gravity near Measurement Events
• Experimental limit on non-linear state-dependent terms in quantum theory
• Quantum Models of Consciousness from a Quantum Information Science Perspective
• On the effectiveness of the collapse in the Diósi-Penrose model
• Analogue gravity simulation of superpositions of spacetimes
• Can quantum non-locality be connected to extra-dimensions?
• An objective collapse model without state dependent stochasticity
• On the linear friction many-body equation for dissipative spontaneous wavefunction collapse
• Quantum state reduction of general initial states through spontaneous unitarity violation
• What can we learn about islands and state paradox from quantum information theory?
• Relativistic quantum field theory of stochastic dynamics in the Hilbert space
• The classical-quantum hybrid canonical dynamics and its difficulties with special and general relativity
• Colored noise driven unitarity violation causing dynamical quantum state reduction
• Can the displacemon device test objective collapse models?
• Feasibility considerations for free-fall tests of gravitational decoherence
• The Role of Quantum Measurements when Testing the Quantum Nature of Gravity
• The Quantum Measurement Problem: A Review of Recent Trends
• Schrödinger--Newton equation with spontaneous wave function collapse
• Conditions for graviton emission in the recombination of a delocalized mass
• Probing the limits of quantum theory with quantum information at subnuclear scales
• Random non-Hermitian action theory for stochastic quantum dynamics: from canonical to path integral quantization
• A simple gravitational self-decoherence model
• Collapse and Measures of Consciousness
• Observability of spontaneous collapse in flavor oscillations and its relation to the CP and CPT symmetries
• Lindbladian-Induced Alignment in Quantum Measurements
• Spontaneous Collapse Models
• Experimental bounds on linear-friction dissipative collapse models from levitated optomechanics
• Exploring the Effects of Mass Dependence in Spontaneous Collapse Models
• Spontaneous wave function collapse from non-local gravitational self-energy
• On the testability of the Károlyházy model
• Hybrid Classical-Quantum Newtonian Gravity with stable vacuum
• Random non-Hermitian Hamiltonian framework for symmetry breaking dynamics
• Non-equilibrium thermodynamics of gravitational objective-collapse models
• Master equations for Wigner functions with spontaneous collapse and their relation to thermodynamic irreversibility
• Challenging Spontaneous Quantum Collapse with XENONnT
• Information versus Physicality: On the Nature of the Wavefunctions of Quantum Mechanics
• Gravity as a classical channel and its dissipative generalization
• How long single-photon detectors stay in quantum superpositions during detection according to the Diósi-Penrose criterion
• Testing the postulates of quantum mechanics with coherent states of light and homodyne detection
• Towards relativistic generalization of collapse models
• Gravitational reduction of the wave function through the quantum theory of motion
• Quantum Physics in Space
• Attraction Induced by Mutual Quantum Measurements of Velocity
• Cavity optomechanics in a fiber cavity: the role of stimulated Brillouin scattering
• Diffusion Minimization via Optimal Smearing in Collapse and Hybrid Classical-Quantum Gravitational Models
• Gravity-related collapse of the wave function and spontaneous heating: revisiting the experimental bounds
• Testing classical-quantum gravity with geodesic deviation
• Seven non-standard models coupling quantum matter and gravity
• Dephasing and inhibition of spin interference from semi-classical self-gravitation
• Statistical Symmetry Breaking and Emergent Colored Noise in a Stochastic Scalar-Doublet Field Theory
• The inconsistency of linear dynamics and Born's rule
• Collapse models and gravitational decoherence at test: How far can we push the limits of quantum mechanics?