Spontaneously Emitted X-rays: An Experimental Signature of the Dynamical Reduction Models

Curceanu, C.; Bartalucci, S.; Bassi, Angelo; Bertolucci, S.; Berucci, C.; Bragadireanu, A. M.; Cargnelli, M.; Clozza, A.; Paolis, L. De; Matteo, S. Di; Donadi, Sandro; D’Uffizi, A.; Egger, J.‐P.; Guaraldo, C.; Iliescu, M.; Ishiwatari, T.; Laubenstein, M.; Márton, J.; Milotti, E.; Pichler, A.; Pietreanu, D.; Piscicchia, K.; Ponta, T.; Sbardella, E.; Scordo, A.; Shi, H.; Sirghi, D.; Sirghi, F.; Sperandio, L.; Doce, O. Vázquez; Zmeskal, J.

doi:10.1007/s10701-015-9923-4

Cited by 19 publications

(21 citation statements)

References 12 publications

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“…The QMUPL model has been investigated for the spontaneous radiation emission from a non-relativistic free charged particle [8,9] and put to an intensive experimental test by X-rays [10][11][12]. For the mass-proportional CSL model experiments with optomechanical cavities have been proposed to detect possible changes in the spectrum of light which drives a mechanical oscillator [13,14].…”

Section: Introductionmentioning

confidence: 99%

Spontaneous collapse: A solution to the measurement problem and a source of the decay in mesonic systems

Simonov

Hiesmayr

2016

Phys. Rev. A

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Dynamical reduction models propose a solution to the measurement problem in quantum mechanics: the collapse of the wave function becomes a physical process. We compute the predictions to decaying and flavor-oscillating neutral mesons for the two most promising collapse models, the QMUPL (Quantum Mechanics with Universal Position Localization) model and the mass-proportional CSL (Continuous Spontaneous Localization) model. Our results are showing (i) a strong sensitivity to the very assumptions of the noise field underlying those two collapse models and (ii) under particular assumptions the CSL case allows even to recover the decay dynamics. This in turn allows to predict the effective collapse rates solely based on the measured values for the oscillation (mass differences) and the measured values of the decay constants. The four types of neutral mesons (Kmeson, D-meson, B d -meson, Bs-meson) lead surprisingly to ranges comparable to those put forward by Adler (2007) and Ghirardi-Rimini-Weber (1986). Our results show that these systems at high energies are very sensitive to possible modifications of the standard quantum theory making them a very powerful laboratory to rule out certain collapse scenarios and studying the detailed physical processes solving the measurement problem.

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Section: Introductionmentioning

confidence: 99%

Spontaneous collapse: A solution to the measurement problem and a source of the decay in mesonic systems

Simonov

Hiesmayr

2016

Phys. Rev. A

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“…They come from noninterferometric tests, which exploit an unavoidable indirect effect of collapse models, namely a tiny violation of the energy conservation [8]. Relevant examples are spontaneous X-ray emission from Germanium [19][20][21], spontaneous heating of massive bulk systems [22][23][24][25][26] or universal force noise on mechanical systems [27][28][29][30][31][32][33][34][35][36][37][38]. Bounds based on the first two effects are already ruling out Adler's parameters, but they can be easily evaded by reasonable assumptions on the spectrum of the CSL noise [22,39].…”

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confidence: 99%

Narrowing the Parameter Space of Collapse Models with Ultracold Layered Force Sensors

et al. 2020

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Despite the unquestionable empirical success of quantum theory, witnessed by the recent uprising of quantum technologies, the debate on how to reconcile the theory with the macroscopic classical world is still open. Spontaneous collapse models, based on stochastic and nonlinear modifications of the Schrödinger equation, are the only experimentally testable solution so far proposed. Here, we describe a new experiment based on monitoring a high quality factor microcantilever loaded by a layered test mass, specifically designed to test the Continuous Spontaneous Localization (CSL) model. The measurements are in good agreement with pure thermal motion for temperatures down to 100 mK. From the absence of excess noise we infer a new bound on the collapse rate at the characteristic length rc = 10 −7 m, which improves over previous mechanical experiments by more than one order of magnitude. Our results are explicitly challenging a well-motivated region of the CSL parameter space proposed by Adler.

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“…The modifications to the free evolution dynamics of Bose-Einstein condensate due to the presence of the collapse mechanism have been investigated 66,67 . And X-ray measurements-which exploit the fact that the collapse mechanism makes charged particles emit radiation [68][69][70] -have already provided strong limits on the Diósi-Penrose model 71 . In this context, also optomechanical experiments are of particular relevance 41,53,54,[72][73][74][75][76] .…”

Section: Non-interferometric Testsmentioning

confidence: 99%

Testing the foundation of quantum physics in space via Interferometric and non-interferometric experiments with mesoscopic nanoparticles

et al. 2021

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Quantum technologies are opening novel avenues for applied and fundamental science at an impressive pace. In this perspective article, we focus on the promises coming from the combination of quantum technologies and space science to test the very foundations of quantum physics and, possibly, new physics. In particular, we survey the field of mesoscopic superpositions of nanoparticles and the potential of interferometric and non-interferometric experiments in space for the investigation of the superposition principle of quantum mechanics and the quantum-to-classical transition. We delve into the possibilities offered by the state-of-the-art of nanoparticle physics projected in the space environment and discuss the numerous challenges, and the corresponding potential advancements, that the space environment presents. In doing this, we also offer an ab-initio estimate of the potential of space-based interferometry with some of the largest systems ever considered and show that there is room for tests of quantum mechanics at an unprecedented level of detail.

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Spontaneously Emitted X-rays: An Experimental Signature of the Dynamical Reduction Models

Cited by 19 publications

References 12 publications

Spontaneous collapse: A solution to the measurement problem and a source of the decay in mesonic systems

Spontaneous collapse: A solution to the measurement problem and a source of the decay in mesonic systems

Narrowing the Parameter Space of Collapse Models with Ultracold Layered Force Sensors

Testing the foundation of quantum physics in space via Interferometric and non-interferometric experiments with mesoscopic nanoparticles

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