Kovachy et al. reply

Kovachy, Timothy; Asenbaum, Peter; Overstreet, Chris; Donnelly, Christine A.; Dickerson, Susannah; Sugarbaker, Alex; Hogan, Jason; Kasevich, Mark A.

doi:10.1038/nature19109

Cited by 16 publications

(20 citation statements)

References 6 publications

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“…Bounding the phase noise of widely separated, macroscopic interferometers is complementary to previous work [22,41,42], which was designed to be sensitive to spurious phase shifts that would occur inhomogeneously [22,42]. With a suitable source mass configuration, the dual interferometer could be used to measure the gravitational Aharonov-Bohm effect [43] and the gravitational constant [44,45].…”

Section: Prl 118 183602 (2017) P H Y S I C a L R E V I E W L E T T Ementioning

confidence: 86%

Measuring the Tidal Force on a Particle’s Matter Wave

Jaffe

Müller

2017

Physics

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Section: Prl 118 183602 (2017) P H Y S I C a L R E V I E W L E T T Ementioning

confidence: 86%

Measuring the Tidal Force on a Particle’s Matter Wave

Jaffe

Müller

2017

Physics

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“…We now perform the Bayesian hypothesis test with the data taken from the Stanford atom fountain experiment [10], which claims to test the superposition principle on the half-metre scale. The original claim was debated, because it hinged on two crucial assertions [38,42]: (i) the rubidium condensate splits coherently and accumulates a stable relative phase ϕ between the two arms in each shot of the experiment, and (ii) uncontrolled vibrations of the recombining beam splitter cause the phase (and the resulting atom counts) to fluctuate randomly from shot to shot. The authors estimated from the data of several dozen shots values of an average interference contrast and phase that parametrize the expected atom count distribution, but these estimates alone are not a sufficient criterion for a coherently split condensate state [36].…”

Section: A Two-mode Interference Of Becsmentioning

confidence: 99%

“…4. Analysis of the Stanford BEC interferometer [42]. Jeffreys' prior based on the likelihood 14is shown as the dotted curve and updated with the data at 90hk transferred photon recoils.…”

Section: A Two-mode Interference Of Becsmentioning

confidence: 99%

Quantum-classical hypothesis tests in macroscopic matter-wave interferometry

Schrinski

Nimmrichter

Hornberger

2020

Phys. Rev. Research

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We assess the most macroscopic matter-wave experiments to date as to the extent to which they probe the quantum-classical boundary by demonstrating interference of heavy molecules and cold atomic ensembles. To this end, we consider a rigorous Bayesian test protocol for a parametrized set of hypothetical modifications of quantum theory, including well-studied spontaneous collapse models, that destroy superpositions and reinstate macrorealism. The range of modification parameters ruled out by the measurement events quantifies the macroscopicity of a quantum experiment, while the shape of the posterior distribution resulting from the Bayesian update reveals how conclusive the data are at testing macrorealism. This protocol may serve as a guide for the design of future matter-wave experiments ever closer to truly macroscopic scales.

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“…4b (blue solid curve)). While not the macroscopic test LG envisaged, this gives an avenue for workable tests of the "classical trajectories" hypothesis that could be applied to atoms [34].…”

mentioning

confidence: 99%

Leggett-Garg tests of macrorealism for bosonic systems including double-well Bose-Einstein condensates and atom interferometers

Rosales-Zárate

Opanchuk

et al. 2018

Phys. Rev. A

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We construct quantifiable generalisations of Leggett-Garg tests for macro/ mesoscopic realism and noninvasive measurability that apply when not all outcomes of measurement can be identified as arising from one of two macroscopically distinguishable states. We show how quantum mechanics predicts a negation of the LG premises for proposals involving ideal-negative-result, weak and quantum non-demolition measurements on dynamical entangled systems, as might be realised with two-well Bose-Einstein condensates, path-entangled NOON states and atom interferometers.Schrodinger raised the apparent inconsistency between macroscopic realism and quantum macroscopic superposition states [1]. Leggett and Garg (LG) suggested to test macroscopic realism against quantum mechanics in an objective sense by comparing the predictions of quantum mechanics with those based on two very general classical premises [2]. The first premise is macroscopic realism (MR), that a system which has two macroscopically distinguishable states available to it is at any time in one or other of the states. The second premise is noninvasive measurability (NIM), that for such a system it is possible to determine which state the system is in, without interfering with the subsequent evolution of that system.Leggett and Garg showed how the two premises constrain the dynamics of a two-state system. Considering three successive times t 3 > t 2 > t 1 , the variable S i denotes which of the two states the system is in at time t i , the respective states being denoted by S i = +1 or −1. The LG premises imply the LG inequality [2,3] LG

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Kovachy et al. reply

Cited by 16 publications

References 6 publications

Measuring the Tidal Force on a Particle’s Matter Wave

Measuring the Tidal Force on a Particle’s Matter Wave

Quantum-classical hypothesis tests in macroscopic matter-wave interferometry

Leggett-Garg tests of macrorealism for bosonic systems including double-well Bose-Einstein condensates and atom interferometers

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