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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. http://resolver.caltech.edu/CaltechAUTHORS:20161205-144444031

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Abstract

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
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevD.95.084054DOIArticle
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.95.084054PublisherArticle
https://arxiv.org/abs/1606.03637arXivDiscussion Paper
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, IQIM, TAPIR
Funders:
Funding AgencyGrant Number
NSFPHY-1404569
NSFPHY-1506453
Australian Research CouncilFT130100329
Australian Research CouncilDP160100760
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Record Number:CaltechAUTHORS:20161205-144444031
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20161205-144444031
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72567
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:06 Dec 2016 20:04
Last Modified:28 Apr 2017 18:20

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