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000877400 1001_ $$0P:(DE-Juel1)167543$$aWillsch, Madita$$b0
000877400 245__ $$aLong-Time Correlations in Single-Neutron Interferometry Data
000877400 260__ $$aTokyo$$bThe Physical Society of Japan$$c2020
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000877400 520__ $$aWe present a detailed analysis of the time series of time-stamped neutron counts obtained by single-neutron interferometry. The neutron counting statistics display the usual Poissonian behavior, but the variance of the neutron counts does not. Instead, the variance is found to exhibit a dependence on the phase-shifter setting which can be explained by a probabilistic model that accounts for fluctuations of the phase shift. The time series of the detection events exhibit long-time correlations with amplitudes that also depend on the phase-shifter setting. These correlations appear as damped oscillations with a period of about 2.8 s. By simulation, we show that the correlations of the time differences observed in the experiment can be reproduced by assuming that, for a fixed setting of the phase shifter, the phase shift experienced by the neutrons varies periodically in time with a period of 2.8 s. The same simulations also reproduce the behavior of the variance. Our analysis of the experimental data suggests that time-stamped data of single-particle interference experiments may exhibit transient features that require a description in terms of non-stationary processes, going beyond the standard quantum model of independent random events.
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000877400 7001_ $$0P:(DE-Juel1)167542$$aWillsch, Dennis$$b1
000877400 7001_ $$0P:(DE-Juel1)138295$$aMichielsen, Kristel$$b2
000877400 7001_ $$0P:(DE-Juel1)144355$$aJin, Fengping$$b3
000877400 7001_ $$0P:(DE-HGF)0$$aDenkmayr, Tobias$$b4
000877400 7001_ $$00000-0002-6568-6045$$aSponar, Stephan$$b5
000877400 7001_ $$00000-0001-5175-0408$$aHasegawa, Yuji$$b6
000877400 7001_ $$0P:(DE-Juel1)179169$$aDe Raedt, Hans$$b7$$eCorresponding author
000877400 773__ $$0PERI:(DE-600)2042147-3$$a10.7566/JPSJ.89.064005$$gVol. 89, no. 6, p. 064005 -$$n6$$p064005 -$$tJournal of the Physical Society of Japan$$v89$$x1347-4073$$y2020
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