Boundary effects in general relativity with tetrad variables
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00540702" target="_blank" >RIV/68378271:_____/20:00540702 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1007/s10714-020-02733-8" target="_blank" >https://doi.org/10.1007/s10714-020-02733-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10714-020-02733-8" target="_blank" >10.1007/s10714-020-02733-8</a>
Alternative languages
Result language
angličtina
Original language name
Boundary effects in general relativity with tetrad variables
Original language description
Varying the gravitational Lagrangian produces a boundary contribution that has various physical applications. It determines the right boundary terms to be added to the action once boundary conditions are specified, and defines the symplectic structure of covariant phase space methods. We study general boundary variations using tetrads instead of the metric. This choice streamlines many calculations, especially in the case of null hypersurfaces with arbitrary coordinates, where we show that the spin-1 momentum coincides with the rotational 1-form of isolated horizons. The additional gauge symmetry of internal Lorentz transformations leaves however an imprint: the boundary variation differs from the metric one by an exact 3-form. On the one hand, this difference helps in the variational principle: gluing hypersurfaces to determine the action boundary terms for given boundary conditions is simpler, including the most general case of non-orthogonal corners.n
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Result continuities
Project
<a href="/en/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Cosmology, Gravity and the Dark Sector of the Universe</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
General Relativity and Gravitation
ISSN
0001-7701
e-ISSN
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Volume of the periodical
52
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
52
Pages from-to
1-52
UT code for WoS article
000567924000002
EID of the result in the Scopus database
2-s2.0-85090084555