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Adaptive coarse graining, environment, strong decoherence, and quasiclassical realms

Gell-Mann, Murray and Hartle, James B. (2014) Adaptive coarse graining, environment, strong decoherence, and quasiclassical realms. Physical Review A, 89 (5). Art. No. 052125. ISSN 1050-2947. doi:10.1103/PhysRevA.89.052125.

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Three ideas are introduced that when brought together characterize the realistic quasiclassical realms of our quantum universe as particular kinds of sets of alternative coarse-grained histories defined by quasiclassical variables: (i) branch-dependent adaptive coarse grainings that can be close to maximally refined and can simplify calculation, (ii) narrative coarse grainings that describe how features of the universe change over time and allow the construction of an environment, and (iii) a notion of strong decoherence that characterizes realistic mechanisms of decoherence.

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Additional Information:©2014 American Physical Society. (Received 14 January 2014; published 21 May 2014) We thank the Aspen Center for Physics for hospitality over several summers while this work was in progress. J.B.H. thanks the Santa Fe Institute for supporting many visits there. The work of J.B.H. was supported in part by the National Science Foundation under Grants No. PHY05-55669, No. PHY08-55415, and No. PHY12-05500. The work of M.G.-M. was supported by the COUQ Foundation, by Insight Venture Management, and by the KITP in Santa Barbara. The generous help provided by these organizations is gratefully acknowledged.
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Santa Fe InstituteUNSPECIFIED
Insight Venture ManagementUNSPECIFIED
Kavli Institute for Theoretical PhysicsUNSPECIFIED
Issue or Number:5
Classification Code:PACS number(s): 03.65.Ta, 03.65.Yz, 98.80.Qc
Record Number:CaltechAUTHORS:20150824-094112601
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Official Citation:Adaptive coarse graining, environment, strong decoherence, and quasiclassical realms Murray Gell-Mann and James B. Hartle Phys. Rev. A 89, 052125
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59835
Deposited By: George Porter
Deposited On:24 Aug 2015 17:52
Last Modified:10 Nov 2021 22:25

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