Results 21 to 30 of about 102,068 (255)
Localization and causality for a free particle [PDF]
Physics Letters A, 2003 Theorems (most notably by Hegerfeldt) prove that an initially localized particle whose time evolution is determined by a positive Hamiltonian will violate causality. We argue that this apparent paradox is resolved for a free particle described by either the Dirac equation or the Klein-Gordon equation because such a particle cannot be localized in the ...
Barat, N., Kimball, J. C.
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Local structure of sprinkled causal sets [PDF]
Physical Review D, 2021 We describe numerical and analytical investigations of causal sets sprinkled into spacetime manifolds. The first part of the paper is a numerical study of finite causal sets sprinkled into Alexandrov subsets of Minkowski spacetime of dimensions $1 + 1$, $1 + 2$ and $1 + 3$.
Christopher J. Fewster +3 more
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Dr. Bertlmann’s Socks in a Quaternionic World of Ambidextral Reality
IEEE Access, 2020 Unlike our basic theories of space and time, quantum mechanics is not a locally causal theory. Moreover, it is widely believed that any hopes of restoring local causality within any realistic theory have been undermined by Bell's theorem and the ...
Joy Christian
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Picturing Indefinite Causal Structure [PDF]
Electronic Proceedings in Theoretical Computer Science, 2017 Following on from the notion of (first-order) causality, which generalises the notion of being tracepreserving from CP-maps to abstract processes, we give a characterization for the most general kind of map which sends causal processes to causal ...
Aleks Kissinger, Sander Uijlen
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Event Causality Extraction Based on Two-Layer CNN-BiGRU-CRF [PDF]
Jisuanji gongcheng, 2021 The existing event causality extraction methods have poor performance in relationship boundary recognition and are limited by insufficient semantic representation of texts.
ZHENG Qiaoduo, WU Zhendong, ZOU Junying
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Thermodynamics of local causal horizons [PDF]
Physical Review D, 2013 We propose an expression for the entropy density associated with the Local Causal Horizons in any diffeomorphism invariant theory of gravity. If the black-hole entropy of the theory satisfies the physical process version of the first law of thermodynamics then our proposed entropy satisfies the Clausius relation.
Mohd, Arif, Sarkar, Sudipta
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Kausalitas antara Penerimaan, Belanja, dan PDRB pada Kota dan Kabupaten di Indonesia
Economic Journal of Emerging Markets, 2009 Causality is an important concept in applied econometrics. It helps us to identify the direction which variable is a cause (policy) and which one is an impact.
Haryo Kuncoro
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Bell’s Theorem Versus Local Realism in a Quaternionic Model of Physical Space
IEEE Access, 2019 In the context of EPR-Bohm type experiments and spin detections confined to spacelike hypersurfaces, a local, deterministic and realistic model within a Friedmann-Robertson-Walker spacetime with a constant spatial curvature (S3) is presented that ...
Joy Christian
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Causality in local quantum field theory [PDF]
Physics Letters B, 1995 compressed uu encoded ps file, 9 pages, Roma ...
MAIANI L, TESTA, Massimo
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Closing the Door on Quantum Nonlocality
Entropy, 2018 Bell-type inequalities are proven using oversimplified probabilistic models and/or counterfactual definiteness (CFD). If setting-dependent variables describing measuring instruments are correctly introduced, none of these inequalities may be proven.
Marian Kupczynski
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