Distribution and Generation of Quantum Coherence for Gaussian States in de Sitter Space
Sign Up to like & getrecommendations! Published in 2021 at "Annalen der Physik"
DOI: 10.1002/andp.202000536
Abstract: We study the distribution and generation of quantum coherence for two-mode and multi-mode Gaussian states in de Sitter space. It is found that the quantum coherence is redistributed among the mode in different open charts… read more here.
Keywords: quantum coherence; space; coherence; distribution generation ... See more keywords
Exceptional scalar theories in de Sitter space
Sign Up to like & getrecommendations! Published in 2022 at "Journal of High Energy Physics"
DOI: 10.1007/jhep04(2022)128
Abstract: Abstract The special galileon and Dirac-Born-Infeld (DBI) theories are effective field theories of a single scalar field that have many interesting properties in flat space. These theories can be extended to all maximally symmetric spaces,… read more here.
Keywords: field redefinition; exceptional scalar; sitter space; space ... See more keywords
Shocks and information exchange in de Sitter space
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep10(2021)104
Abstract: Abstract We discuss some implications of recent progress in understanding the black hole information paradox for complementarity in de Sitter space. Extending recent work by two of the authors, we describe a bulk procedure that… read more here.
Keywords: procedure; sitter space; shocks information; information ... See more keywords
On the consistency of (partially-)massless matter couplings in de Sitter space
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep10(2021)156
Abstract: Abstract We study the consistency of the cubic couplings of a (partially-)massless spinning field to two scalars in (d + 1)-dimensional de Sitter space. Gauge invariance of observables with external (partially)-massless spinning fields translates into… read more here.
Keywords: ward takahashi; matter; takahashi identities; sitter space ... See more keywords
Stable compact spacelike hypersurfaces in the de Sitter space as maxima of a linear combination of area and volume
Sign Up to like & getrecommendations! Published in 2019 at "manuscripta mathematica"
DOI: 10.1007/s00229-018-1047-7
Abstract: We define the notion of strong (r, s, a, b)-stability concerning compact space-like hypersurfaces immersed in the de Sitter space $$\mathbb {S}^{n+1}_1$$S1n+1. We study the variational problem of maximizing a certain Jacobi functional given by a linear combination… read more here.
Keywords: combination area; space; sitter space; linear combination ... See more keywords
Complexity in de Sitter space.
Sign Up to like & getrecommendations! Published in 2017 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/aa8122
Abstract: We consider the holographic complexity conjectures for de-Sitter invariant states in a quantum field theory on de Sitter space, dual to asymptotically anti-de Sitter geometries with de Sitter boundaries. The bulk holographic duals include solutions… read more here.
Keywords: sitter space; complexity sitter; complexity;
De Sitter space and entanglement
Sign Up to like & getrecommendations! Published in 2019 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ab5b78
Abstract: We argue that the notion of entanglement in de Sitter space arises naturally from the non-trivial Lorentzian geometry of the spacetime manifold, which consists of two disconnected boundaries and a causally disconnected interior. In four… read more here.
Keywords: entanglement sitter; entanglement; space entanglement; sitter space ... See more keywords
De Sitter space-times in entangled relativity
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DOI: 10.1088/1361-6382/ac0589
Abstract: It is argued that de Sitter space-times might be solutions of entangled relativity once the quantum trace anomaly from matter fields in curved space-times is taken into account. This hypothesis would be an elegant solution… read more here.
Keywords: entangled relativity; times entangled; sitter space; space times ... See more keywords
Is de Sitter space always excluded in semiclassical f(R) gravity?
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/06/005
Abstract: It is shown that the recent corpuscular description of gravity generically excludes de Sitter spacetime in any semiclassical version of f(R) gravity. A phantom phenomenology of the cosmic dynamics is also naturally excluded. read more here.
Keywords: always excluded; space always; sitter space; semiclassical gravity ... See more keywords
Instability of de Sitter space under thermal radiation in different vacua
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DOI: 10.1088/1475-7516/2021/10/042
Abstract: We study the instability of de Sitter space-time (dS) under thermal radiation in different vacua. We argue that the mode function solution of a scalar field in four-dimensional dS can be separated into the incoming… read more here.
Keywords: different vacua; instability sitter; thermal radiation; radiation different ... See more keywords
Gaupta-Bleuler triplet for massless spin-3/2 field in de Sitter space
Sign Up to like & getrecommendations! Published in 2017 at "Chinese Physics C"
DOI: 10.1088/1674-1137/41/9/093106
Abstract: Physicists have been interested in quantization of spinor and vector free fields in 4-dimensional de Sitter space-time, in ambient space notation. The Gupta-Bleuler formalism has been extensively applied to the quantization of gauge invariant theories.… read more here.
Keywords: massless spin; bleuler; sitter space; space ... See more keywords