Strain-induced pseudomagnetic and scalar fields in symmetry-enforced Dirac nodes
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Magnetism and Magnetic Materials"
DOI: 10.1016/j.jmmm.2017.12.056
Abstract: Abstract It is known that Dirac nodes can be present at high-symmetry points of Brillouin zone only for certain space groups. For these cases, the effect of strain is treated by symmetry considerations. The dependence… read more here.
Keywords: dirac nodes; pseudomagnetic scalar; induced pseudomagnetic; scalar fields ... See more keywords
Scalar fields on λ-deformed cosets
Sign Up to like & getrecommendations! Published in 2019 at "Nuclear Physics B"
DOI: 10.1016/j.nuclphysb.2018.12.002
Abstract: Abstract We study dynamics of scalar fields on a large class of geometries described by integrable sigma models. Although equations of motion are not separable due to absence of isometries and Killing tensors, we completely… read more here.
Keywords: deformed cosets; scalar fields; fields deformed;
Reduced loop quantization with four Klein–Gordon scalar fields as reference matter
Sign Up to like & getrecommendations! Published in 2019 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ab26f4
Abstract: We perform a reduced phase space quantization of gravity using four Klein-Gordon scalar fields as reference matter as an alternative to the Brown-Kuchar dust model in [1], where dust scalar fields are used. We compare… read more here.
Keywords: scalar fields; quantization; klein gordon; reference matter ... See more keywords
Scalar fields and the FLRW singularity
Sign Up to like & getrecommendations! Published in 2019 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ab4eb4
Abstract: The dynamics of multiple scalar fields on a flat FLRW spacetime can be described entirely as a relational system in terms of the matter alone. The matter dynamics is an autonomous system from which the… read more here.
Keywords: fields flrw; system; flrw singularity; cosmology ... See more keywords
Self-interacting gravitational atoms in the strong-gravity regime
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2023/04/018
Abstract: We numerically investigate free and self-interacting ultralight scalar fields around black holes in General Relativity. We focus on complex scalar fields Φ whose self-interactions are described by the quartic potential V ∝ λ |Φ|4, and… read more here.
Keywords: regime; self interacting; self; scalar fields ... See more keywords
Charged scalar fields in a Kerr–Sen black hole: exact solutions, Hawking radiation, and resonant frequencies
Sign Up to like & getrecommendations! Published in 2019 at "Chinese Physics C"
DOI: 10.1088/1674-1137/43/3/035102
Abstract: In this study, we consider charged massive scalar fields around a Kerr-Sen spacetime. The radial and angular parts of the covariant Klein-Gordon equation are solved in terms of the confluent Heun function. From the exact… read more here.
Keywords: kerr sen; hawking radiation; scalar fields; resonant frequencies ... See more keywords
Oscillating scalar fields and the Hubble tension: A resolution with novel signatures
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.063523
Abstract: We present a detailed investigation of a subdominant oscillating scalar field [“early dark energy” (EDE)] in the context of resolving the Hubble tension. Consistent with earlier work, but without relying on fluid approximations, we find… read more here.
Keywords: field; oscillating scalar; scalar fields; scalar field ... See more keywords
Stochastic evolution of scalar fields with continuous symmetries during inflation
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.102.023526
Abstract: During inflation, scalar fields with masses less than the Hubble scale acquire vacuum expectation values (vevs) via stochastic processes driven by quantum fluctuations. For nearly massless spectator scalars transforming nontrivially under a continuous symmetry group,… read more here.
Keywords: scalar fields; inflation; evolution scalar; fields continuous ... See more keywords
Criticality in the collapse of spherically symmetric massless scalar fields in semiclassical loop quantum gravity
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.104.024008
Abstract: In a recent paper we showed that the collapse to a black hole in one-parameter families of initial data for massless, minimally coupled scalar fields in spherically symmetric semi-classical loop quantum gravity exhibited a universal… read more here.
Keywords: spherically symmetric; massless; scalar fields; loop quantum ... See more keywords
Formation of bound states of scalar fields in AdS-asymptotic wormholes
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.104.024039
Abstract: We use the Wentzel-Kramers-Brillouin (WKB) approximation to study the formation and propagation of bound states in the vicinity of a wormhole in the non-minimal derivative coupling theory of gravity. The wormhole throat connects two Anti-de… read more here.
Keywords: ads asymptotic; scalar fields; formation bound; fields ads ... See more keywords
Symmetry breaking patterns for two coupled complex scalar fields at finite temperature and in an external magnetic field
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.104.096011
Abstract: A model of two coupled complex scalar fields is studied at finite temperature and under an external magnetic field. The results are obtained in the context of the nonperturbative method of the optimized perturbation theory… read more here.
Keywords: complex scalar; scalar fields; finite temperature; two coupled ... See more keywords