Semiclassical gravity in the far field limit of stars, black holes, and wormholes

The existence of braneworld black holes may be of primordial origin, or may even be produced in high energy particle collisions in the laboratory and in cosmic ray showers as well. These black holes obey a modified mass–radius relationship compared to standard Schwarzschild black holes. Using the variational principle we calculate the bending angle of a light ray near the horizon of a braneworld black hole in the weak field limit. We next derive the expressions of several lensing quantities like the Einstein radius and the magnification for a point light source. These expressions are modified compared to the lensing quantities for standard Schwarzschild black holes and contain the scale of the extra dimensions.

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SPACETIME FOAM

International Journal of Modern Physics D ◽

10.1142/s0218271802002931 ◽

2002 ◽

Vol 11 (10) ◽

pp. 1585-1590 ◽

Cited By ~ 23

Author(s):

Y. JACK NG

Keyword(s):

Black Holes ◽

Black Hole ◽

Black Hole Physics ◽

Atom Interferometry ◽

Holographic Principle ◽

Experimental Result ◽

Semiclassical Gravity ◽

Spacetime Foam ◽

Spacetime Fluctuations

Spacetime is composed of a fluctuating arrangement of bubbles or loops called spacetime foam, or quantum foam. We use the holographic principle to deduce its structure, and show that the result is consistent with gedanken experiments involving spacetime measurements. We propose to use laser-based atom interferometry techniques to look for spacetime fluctuations. Our analysis makes it clear that the physics of quantum foam is inextricably linked to that of black holes. A negative experimental result, therefore, might have non-trivial ramifications for semiclassical gravity and black hole physics.

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BLACK HOLES RADIATE BUT DO NOT EVAPORATE

International Journal of Modern Physics D ◽

10.1142/s0218271805007796 ◽

2005 ◽

Vol 14 (12) ◽

pp. 2257-2261 ◽

Cited By ~ 5

Author(s):

HRVOJE NIKOLIĆ

Keyword(s):

Black Holes ◽

Black Hole ◽

Hawking Radiation ◽

Negative Energy ◽

Black Hole Mass ◽

Black Hole Radiation ◽

Semiclassical Gravity ◽

Black Hole Interior ◽

Semiclassical State ◽

Infinite Temperature

During the black hole radiation, the interior contains all the matter of the initial black hole, together with the negative energy quanta entangled with the exterior Hawking radiation. Neither the initial matter nor the negative energy quanta evaporate from the black hole interior. Therefore, the information is not lost during the radiation. The black hole mass eventually drops to zero in semiclassical gravity, but this semiclassical state has an infinite temperature and still contains all the initial matter together with the negative energy entangled with the exterior radiation.

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SUPERMASSIVE BLACK HOLES AND THE STRONG FIELD LIMIT OF GENERAL RELATIVITY

10.2172/768768 ◽

2000 ◽

Author(s):

W. ZUREK ◽

ET AL

Keyword(s):

Black Holes ◽

General Relativity ◽

Strong Field ◽

Supermassive Black Holes ◽

Field Limit ◽

Strong Field Limit

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ZERO TEMPERATURE BLACK HOLES IN SEMICLASSICAL GRAVITY

The Ninth Marcel Grossmann Meeting ◽

10.1142/9789812777386_0289 ◽

2002 ◽

pp. 1507-1508

Author(s):

PAUL R. ANDERSON ◽

WILLIAM A. HISCOCK ◽

BRETT E. TAYLOR

Keyword(s):

Black Holes ◽

Zero Temperature ◽

Semiclassical Gravity

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The far-field limit profile functions of two overlapped dyons

Progress of Theoretical and Experimental Physics ◽

10.1093/ptep/ptz086 ◽

2019 ◽

Vol 2019 (9) ◽

Author(s):

Motahareh Kiamari ◽

Sedigheh Deldar

Keyword(s):

Equations Of Motion ◽

Far Field ◽

Field Limit ◽

Yang Mills ◽

Different Types ◽

Confinement Phase

Abstract We study the profile functions of two overlapped dyons at infinity. We assume that the superposition of two dyons satisfies the Yang–Mills (Y–M) equation and then we find new equations of motion for individual dyons which no longer satisfy the original Y–M equation. By solving these new equations we find that the profile functions of two overlapped dyons of the same type at infinity look like the profile functions of one dyon. However, the superposition of two dyons of different types gives a trivial holonomy and therefore no contribution in the confinement phase is observed.

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