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  Asymptotics and Hamiltonians in a first-order formalism

Ashtekar, A., Engle, J., & Sloan, D. (2008). Asymptotics and Hamiltonians in a first-order formalism. Classical and Quantum Gravity, 25(9): 095020. doi:10.1088/0264-9381/25/9/095020.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-62C9-E Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-62CA-C
Genre: Journal Article

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 Creators:
Ashtekar, Abhay1, Author
Engle, Jonathan1, Author
Sloan, David2, Author
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1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_24014              
2External Organizations, , , ou_persistent22              

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 Abstract: We consider four-dimensional spacetimes which are asymptotically flat at spatial infinity and show that, in the first-order framework, the action principle for general relativity is well defined without the need of infinite counter terms. It naturally leads to a covariant phase space in which the Hamiltonians generating asymptotic symmetries provide the total energy–momentum and angular momentum of the spacetime. We address the subtle but important problems that arise because of logarithmic translations and super translations both in the Lagrangian and Hamiltonian frameworks. As a forthcoming paper will show, the treatment of higher dimensions is considerably simpler. Our first-order framework also suggests a new direction for generalizing the spectral action of non-commutative geometry.

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Language(s): eng - English
 Dates: 2008-05
 Publication Status: Issued
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 Identifiers: DOI: 10.1088/0264-9381/25/9/095020
eDoc: 374073
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Title: Classical and Quantum Gravity
Source Genre: Journal
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Pages: - Volume / Issue: 25 (9) Sequence Number: 095020 Start / End Page: - Identifier: ISSN: 1361-6382