Hawking fragmentation and Hawking attenuation in Weyl semimetals

Sabsovich, Daniel; Wunderlich, Paul; Fleurov, Victor; Pikulin, Dmitry I.; Ilan, Roni; Meng, Tobias

doi:10.48550/arxiv.2106.14553

Cited by 3 publications

(3 citation statements)

References 83 publications

(104 reference statements)

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“…In the Weyl semimetals, the black hole horizon and the corresponding Hawking radiation can be simulated by creation of the region with overtilted Dirac cone, 7,9,10,[12][13][14] where |v(r)| > 1 (see Fig. 1 right).…”

Section: Analog Of Horizon In Weyl Semimetalsmentioning

confidence: 99%

Type-II Weyl semimetal vs gravastar

Volovik

2021

Preprint

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The boundary between the type I and type II Weyl semimetals serves as the event horizon for the "relativistic" fermions. The interior of the black hole is represented by the type II Weyl semimetal, where the Fermi surface is formed. The process of the filling of the Fermi surface by electrons results in the relaxation inside the horizon. This leads to the Hawking radiation and to the reconstruction of the interior vacuum state. After the Fermi surface is fully occupied, the interior region reaches the equilibrium state, for which the Hawking radiation is absent. If this scenario is applicable to the real black hole, then the final state of the black hole will be the dark energy star with the event horizon. Inside the event horizon one would have de Sitter space time, which is separated from the horizon by the shell of the Planck length width. Both the de Sitter part and the shell are made of the vacuum fields without matter. This is distinct from the gravastar, in which the matter shell is outside the "horizon", and which we call the type I gravastar. But this is similar to the other type of the vacuum black hole, where the shell is inside the horizon, and which we call the type II gravastar. We suggest to study the vacuum structure of the type II gravastar using the q-theory, where the vacuum variable is the 4-form field introduced for the phenomenological description of the quantum vacuum.

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Section: Analog Of Horizon In Weyl Semimetalsmentioning

confidence: 99%

Type-II Weyl semimetal vs gravastar

Volovik

2021

Preprint

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“…This triggers off the idea of an artificial Hawking radiation in Weyl semimetals [28][29][30][31]. Very recently, a study of the reasonableness of connecting (over-)tilted Weyl nodes with the manifestation of black holes, along with an overall experimental viability, has received further attention [26] Consider the following non-Hermitian Hamiltonian of a topologically insulating two band model…”

Section: Pseudo-hermitian Hamiltonianmentioning

confidence: 99%

A weak pseudo-Hermitian two band model, artificial Hawking radiation and tunneling

Bagchi¹,

Sen²

2021

Preprint

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“…Moreover, Sakalli and Övgün have studied gravitational lensing problem of the Rindler modified Schwarzschild black hole and their investigations show how the Rindler acceleration affects the Hawking radiation and gravitational lensing [94]. Sabsovich et al have studied the black/ white holes analogues in Weyl semimetals with inhomogenous nodal tilts and their an analogue Hawking temperature, which can be measured in metamaterials and solids [95]. Moreover, the index of the refraction plays a decisive role on the tunneling rate [96] and Sakalli, Övgün and Mirekhtiary have calculated the value of refractive index n to show the gravitational lensing effect on the the tunneling rate of the Hawking radiation using a non-asymptotically flat dyonic black hole in four-dimensional Einstein-Maxwell-Dilaton gravity [97].…”

Section: Introductionmentioning

confidence: 99%

Dark matter effect on the weak deflection angle by black holes at the center of Milky Way and M87 galaxies

Pantig

Овгун

2022

Eur. Phys. J. C

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In this paper, we investigated the effect of dark matter on the weak deflection angle by black holes at the galactic center. We consider three known dark matter density profiles such as the Cold Dark Matter, Scalar Field Dark Matter, and the Universal Rotation Curve from the Burkert profile. To achieve this goal, we used how the positional angles are measured by the Ishihara et al. method based on the Gauss–Bonnet theorem on the optical metric. With the help of the non-asymptotic form of the Gauss-Bonnet theorem, the longitudinal angle difference is also calculated. First, we find the emergence of apparent divergent terms on the said profiles, which indicates that the spacetime describing the black hole-dark matter combination is non-asymptotic. We showed that these apparent divergent terms vanish when the distance of the source and receiver are astronomically distant from the black hole. Using the current observational data in the Milky Way and M87 galaxies, we find interesting behaviors of how the weak deflection angle varies with the impact parameter, which gives us some hint on how dark matter interacts with the null particles for each dark matter density profile. We conclude that since these deviations are evident near the dark matter core radius, the weak deflection angle offers a better alternative for dark matter detection than using the deviation from the black hole shadow. With the dark matter profiles explored in this study, we find that the variation of the values for weak deflection angle strongly depends on the dark matter mass on a particular profile.

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Hawking fragmentation and Hawking attenuation in Weyl semimetals

Cited by 3 publications

References 83 publications

Type-II Weyl semimetal vs gravastar

Type-II Weyl semimetal vs gravastar

A weak pseudo-Hermitian two band model, artificial Hawking radiation and tunneling

Dark matter effect on the weak deflection angle by black holes at the center of Milky Way and M87 galaxies

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