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=== Non-interferometric experiments ===
Non-interferometric experiments consist in CSL tests, which are not based on the preparation of a superposition. They exploit an indirect effect of the collapse, which consists in a Brownian motion induced by the interaction with the collapse noise. The effect of this noise amounts to an effective stochastic force acting on the system, and several experiments can be designed to quantify such a force. They include:<ref>{{Cite journal |last1=Carlesso |first1=Matteo |last2=Donadi |first2=Sandro |last3=Ferialdi |first3=Luca |last4=Paternostro |first4=Mauro |last5=Ulbricht |first5=Hendrik |last6=Bassi |first6=Angelo |date=February 2022 |title=Present status and future challenges of non-interferometric tests of collapse models |url=https://www.nature.com/articles/s41567-021-01489-5 |journal=Nature Physics |language=en |volume=18 |issue=3 |pages=243–250 |doi=10.1038/s41567-021-01489-5 |arxiv=2203.04231 |bibcode=2022NatPh..18..243C |s2cid=246949254 |issn=1745-2481}}</ref>
* ''Radiation emission from charged particles''. If a particle is electrically charged, the action of the coupling with the collapse noise will induce the emission of radiation. This result is in net contrast with the predictions of quantum mechanics, where no radiation is expected from a free particle. The predicted CSL-induced emission rate at frequency <math>\omega</math> for a particle of charge <math>Q</math> is given by:<ref>{{Cite journal|last1=Adler|first1=Stephen L|last2=Ramazanoğlu|first2=Fethi M|date=2007-10-16|title=Photon-emission rate from atomic systems in the CSL model|journal=Journal of Physics A: Mathematical and Theoretical|volume=40|issue=44|pages=13395–13406|doi=10.1088/1751-8113/40/44/017|arxiv=0707.3134|bibcode=2007JPhA...4013395A|s2cid=14772616 |issn=1751-8113}}</ref><ref>{{Cite journal|last1=Bassi|first1=Angelo|last2=Ferialdi|first2=Luca|date=2009-07-31|title=Non-Markovian dynamics for a free quantum particle subject to spontaneous collapse in space: General solution and main properties|journal=Physical Review A|volume=80|issue=1|pages=012116|doi=10.1103/PhysRevA.80.012116|arxiv=0901.1254|bibcode=2009PhRvA..80a2116B|s2cid=119297164}}</ref><ref>{{Cite journal|last1=Adler|first1=Stephen L|last2=Bassi|first2=Angelo|last3=Donadi|first3=Sandro|date=2013-06-03|title=On spontaneous photon emission in collapse models|journal=Journal of Physics A: Mathematical and Theoretical|volume=46|issue=24|pages=245304|doi=10.1088/1751-8113/46/24/245304|issn=1751-8113|arxiv=1011.3941|bibcode=2013JPhA...46x5304A|s2cid=119307432}}</ref><ref>{{Cite journal|last1=Bassi|first1=A.|last2=Donadi|first2=S.|date=2014-02-14|title=Spontaneous photon emission from a non-relativistic free charged particle in collapse models: A case study|url=http://www.sciencedirect.com/science/article/pii/S0375960114000073|journal=Physics Letters A|language=en|volume=378|issue=10|pages=761–765|doi=10.1016/j.physleta.2014.01.002|issn=0375-9601|arxiv=1307.0560|bibcode=2014PhLA..378..761B|s2cid=118405901}}</ref>
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