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LISA pathfinder appreciably constrains collapse models

Helou, Bassam and Slagmolen, B. J. J. and McClelland, David E. and Chen, Yanbei (2017) LISA pathfinder appreciably constrains collapse models. Physical Review D, 95 (8). Art. No. 084054. ISSN 2470-0010. doi:10.1103/PhysRevD.95.084054.

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Spontaneous collapse models are phenomological theories formulated to address major difficulties in macroscopic quantum mechanics. We place significant bounds on the parameters of the leading collapse models, the continuous spontaneous localization (CSL) model, and the Diosi-Penrose (DP) model, by using LISA Pathfinder’s measurement, at a record accuracy, of the relative acceleration noise between two free-falling macroscopic test masses. In particular, we bound the CSL collapse rate to be at most (2.96±0.12)×10^(−8)  s^(−1). This competitive bound explores a new frequency regime, 0.7 to 20 mHz, and overlaps with the lower bound 10^(−8±2)  s^(−1) proposed by Adler in order for the CSL collapse noise to be substantial enough to explain the phenomenology of quantum measurement. Moreover, we bound the regularization cutoff scale used in the DP model to prevent divergences to be at least 40.1±0.5  fm, which is larger than the size of any nucleus. Thus, we rule out the DP model if the cutoff is the size of a fundamental particle.

Item Type:Article
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URLURL TypeDescription Paper
Chen, Yanbei0000-0002-9730-9463
Additional Information:© 2017 American Physical Society. Received 20 July 2016; revised manuscript received 12 August 2016; published 28 April 2017. We acknowledge support from the National Science Foundation Grants No. PHY-1404569 and No. PHY-1506453, from the Australian Research Council Grants No. FT130100329 and No. DP160100760, and from the Institute for Quantum Information and Matter, a Physics Frontier Center.
Group:Institute for Quantum Information and Matter, TAPIR, Astronomy Department
Funding AgencyGrant Number
Australian Research CouncilFT130100329
Australian Research CouncilDP160100760
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Issue or Number:8
Record Number:CaltechAUTHORS:20161205-144444031
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72567
Deposited By: Ruth Sustaita
Deposited On:06 Dec 2016 20:04
Last Modified:11 Nov 2021 05:03

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