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Physics, Volume 5, Issue 4

December 2023 - 14 articles

Cover Story: The vacuum fluctuations of bulk fields induce a surface energy–momentum tensor on branes orthogonal to the AdS boundary. For an observer living on the brane, the corresponding equation of state is of the cosmological constant type. Depending on the boundary conditions and on the separation between the branes, the surface energy densities can be either positive or negative. The energy density induced on the brane vanishes in special cases of Dirichlet and Neumann boundary conditions on that brane. The effect of gravity is essential at separations between the branes of the order or larger than the curvature radius for AdS spacetime. In the large separation limit, the decay of the energy density, as a function of the proper separation, follows a power law for both massless and massive fields. View this paper

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Communication

3 Citations

1,904 Views

10 Pages

Electromagnetic Casimir–Polder Interaction for a Conducting Cone

Noah Graham

Physics2023, 5(4), 1003-1012;https://doi.org/10.3390/physics5040065

12 October 2023

Using the formulation of the electromagnetic Green’s function of a perfectly conducting cone in terms of analytically continued angular momentum, we compute the Casimir–Polder interaction energy of a cone with a polarizable particle. We i...

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Article

6 Citations

2,580 Views

20 Pages

On Possible Minimal Length Deformation of Metric Tensor, Levi-Civita Connection, and the Riemann Curvature Tensor

Fady Tarek Farouk,
Abdel Nasser Tawfik,
Fawzy Salah Tarabia and
Muhammad Maher

Physics2023, 5(4), 983-1002;https://doi.org/10.3390/physics5040064

9 October 2023

The minimal length conjecture is merged with a generalized quantum uncertainty formula, where we identify the minimal uncertainty in a particle’s position as the minimal measurable length scale. Thus, we obtain a quantum-induced deformation par...

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Article

1 Citations

2,020 Views

15 Pages

The Hawking Effect in the Particles–Partners Correlations

Roberto Balbinot and
Alessandro Fabbri

Physics2023, 5(4), 968-982;https://doi.org/10.3390/physics5040063

27 September 2023

We analyze the correlations functions across the horizon in Hawking black hole radiation to reveal the correlations between Hawking particles and their partners. The effects of the underlying space–time on this are shown in various examples ran...

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Article

14 Citations

3,463 Views

16 Pages

Casimir Effect Invalidates the Drude Model for Transverse Electric Evanescent Waves

Galina L. Klimchitskaya and
Vladimir M. Mostepanenko

Physics2023, 5(4), 952-967;https://doi.org/10.3390/physics5040062

27 September 2023

We consider the Casimir pressure between two metallic plates and calculate the four contributions to it determined by the propagating and evanescent waves and by the transverse magnetic and transverse electric polarizations of the electromagnetic fie...

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Physics - ISSN 2624-8174

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