- Black hole electron
In

physics , there is a**speculative**notion that if there were ablack hole with the same mass and charge as anelectron , it would share many of the properties of the electron including the magnetic moment andCompton wavelength .**Problems**As a description, the black hole electron theory is incomplete. The first problem is that black holes tend to merge when they meet. Therefore, a collection of black-hole electrons would be expected to become one big black hole. Also, an electron-positron collision would be expected to produce a larger neutral black hole instead of two photons as is observed. These problems reflect the non-quantum nature of

general relativity theory.A more serious issue is

Hawking radiation . According to Hawking's theory, a black hole the size and mass of an electron should vanish in a shower of photons (not just two photons of a given energy) within a small fraction of a second. Again, the current incompatibility of general relativity andquantum mechanics at electron scales prevents us from understanding why this never occurs.The

Kerr-Newman metric used to represent a charged, rotating black hole in General Relativity has three specifiable parameters: the mass of the hole, "M"; the charge of the hole, "Q"; and the angular momentum per unit mass, "a". This metric defines a black hole with an event horizon only when these quantities satisfy the relation:$a^2\; +\; Q^2\; leq\; M^2.$

An electron's "a" and "Q" (suitably specified in

geometrized units ) both exceed its mass "M". Using these values in the Kerr-Newman solution yields a "superextreme" Kerr-Newman metric. This metric has no event horizons and thus no black hole, only a naked, spinning ring singularity. A superextreme metric has many seemingly unphysical properties, the most severe being the ring's violation of thecosmic censorship hypothesis and appearance of causality-violatingclosed timelike curve s in the immediate vicinity of the ring.For these reasons, this speculation is considered a 'toy model', an at best incomplete description of the nature of an electron.

**chwarzschild radius**The

Schwarzschild radius ("r_{s}") of any mass is calculated using the following formula::$r\_s\; =\; frac\{2Gm\}\{c^2\}$For an electron,

:"G" is Newton's

gravitational constant ,:"m" is the mass of theelectron = 9.109×10^{−31}kg, and:"c" is thespeed of light .This gives a value

:"r

_{e}" = 1.353×10^{−57}mSo if the electron has a radius as small as this, it would become a gravitational singularity. It would then have a number of properties in common with black holes.

Standard

quantum electrodynamics (QED) theory treats the electron as a point particle, a view completely supported by experiment. Practically, though, particle experiments cannot probe arbitrarily large energy scales, and so QED-based experiments bound the electron radius to a value smaller than theCompton wavelength of a large mass, on the order of $10^6$ GeV, or:$r\; approx\; frac\{alpha\; hbar\; c\}\{10^6\; GeV\}\; approx\; 10^\{-24\}\; m$

**Other Issues**In accordance with black hole theory, a gravitationally collapsed electron is required to have maximal angular momentum so that it does not have elevated temperature. The angular momentum value is required to be $frac\{hbar\}\{2\}$. Without elevated temperature it will not lose mass by Hawking radiation. For a rotating black hole, the Kerr metric equations apply. The intrinsic singularity will then be a ring that lies in the equatorial plane of the particle with a radius value larger than $(frac\{2Gm\}\{c^2\})$. The radius value $(frac\{3Gm\}\{c^2\})$ is compatible with $frac\{hbar\}\{2\}$ angular momentum. With this radius (ring) singularity, the electron would be a superextreme black hole with a = (3/2) M rather than an "extreme Kerr" black hole with a = M (using geometrized units). The Russian theorist Alexander Burinskii, in his paper titled, The Dirac-Kerr electron, noted that the electron angular momentum $frac\{hbar\}\{2\}$ is so high that black hole horizons disappear and the electron particle is a naked singular ring. Some theorists, including Stephen Hawking and Kip Thorne, have recently concluded that the laws of nature do permit the formation of a naked singularity during gravitational collapse. In a later paper (2007) titled, Kerr Geometry as Space-Time Structure of the Dirac Electron, Burinskii writes:"In this work we obtain an exact correspondence between the wave function of the Dirac equation and the spinor (twistorial) structure of the Kerr geometry. It allows us to assume that the Kerr-Newman geometry reflects the specific space-time structure of electron, and electron contains really the Kerr-Newman circular string of Compton size". The Burinskii papers describe an electron as a gravitationally confined ring singularity without an event horizon. It has some, but not all of the predicted properties of a black hole. A new name other than "Black hole electron" is needed for this model.

At the radius $(frac\{3Gm\}\{c^2\})$, a special space curvature condition is found. An electromagnetic wave has a 50 percent probability of either orbiting and spiraling inward or spiraling away to infinity due to the gravitational space curvature at $(frac\{3Gm\}\{c^2\})$. The radius $(frac\{3Gm\}\{c^2\})$ is the gravitational photon orbit radius or

photon sphere radius. This radius is critical if self-gravitational attraction is required to produce a stable state. A photon, confined by its self-gravitational attraction would have toroidal topology, as described in the paper, Is the electron a photon with toroidal topology? by J.G. Williamson and M.B. van der Mark. A gravitationally confined wave particle will have geon-like properties because its angular momentum accounts for its total mass energy. It has zero residual (irreducible) mass when its spin energy is extracted (radiated away). The toroidal topology electron model defines a stationary wave propagating around a double loop. In this model, photon wavelength is 4pi times the loop radius. Diffractive limit space curvature is required for this model to work. Limit space curvature is predicted at (and within) thephoton sphere radius.The ratio, 4 pi times 3Gm/c squared, divided by the electron Compton wavelength is 1.051x10 exp -44 to one. The square root of this ratio will be the implied gravitational time dilation ratio or photon blueshift ratio at the electron mass photon capture radius. This ratio, 1.025x10 exp -22 to one, is equal to 4 pi times Planck length times (3/2) exp 1/2, divided by the electron Compton wavelength.

A dimensionless ratio that is equal to, 4 pi times 3Gm/c squared, divided by the electron Compton wavelength is (3/2) exponent 1/2, times Planck time, divided by 2 pi seconds. These two ratios are equal only when the applicable gravitational constant has the value 6.6717456x10 exp -11. The Planck time is (hG/2 pi c exp 5) exp 1/2. The value (Le) is the electron Compton wavelength. The value (Le/2) is the photon wavelength that has energy equal to the mass energy of one electron plus one positron.

4 pi (3Gm/c exp 2) / Le = (3/2) exp 1/2, times (time P) / 2 pi seconds

(3/2) exp 1/2, times (time P / 2 pi seconds) = 1.05068319x10 exp -44

(3/2) exp 1/4, times (time P / 2 pi seconds) exp 1/2 = 1.02502838x10 exp -22

This is the implied dimentionless time dilation ratio or photon blueshift ratio at the photon orbit radius.

4 pi (length P) times (3/2) exp 1/2, divided by Le = 1.02502838x10 exp -22

The electron Compton wavelength is then found to be 4 pi (3 pi hG/c) exp 1/4 meters. The applicable G value is 0.99962 times the CODATA value 6.67428x10 exp -11. The reason for the smaller G value is not known. However, this is a very difficult physical constant value to measure accurately.

The electron mass is the product of (hc/12pi G) exp 1/2 and the dimensionless time dilation ratio 1.02502838x10 exp -22 to one. The value (hc/2pi G)exp 1/2 is the Planck mass. The observed identity of electron particles is explained when the electron mass is shown to have a specific relationship to the Planck mass.

(hc/2pi G) exp 1/2,times(1/2)(2/3) exp 1/2 = (hc/12pi G) exp 1/2

(hc/12pi G) exp 1/2 = 8.88695598x10 exp -9 kg

(hc/12pi G) exp 1/2,times(3/2) exp 1/4,times(time P/2pi seconds) exp 1/2

= (h/4pi c)(c/3pi hG) exp 1/4 = 9.1093821x10 exp -31 kg

This mass value is consistent with the electron Compton wavelength 4pi (3pi hG/c) exp 1/4 meters.

m c squared = hc/Le

m = (h/c)(1/Le)

m = (h/c)(1/4pi)(c/3pi hG) exp 1/4 kg

**See also***

Quantum gravity **References*** Roger Penrose, "". (2004) Jonathan Cape, London.

* S. W. Hawking, "Monthly Notices of the Royal Astronomical Society",**152**(1971) 75.

* Abdus Salam, chapter in "Quantum Gravity: an Oxford Symposium", Eds. Isham, Penrose and Sciama, Oxford University Press.

* G. 't Hooft, [*http://dx.doi.org/10.1016/0550-3213(90)90174-C "The black hole interpretation of string theory"*] "Nuclear Physics B",**335**(1990) 138-154.

* M. J. Duff, [*http://xxx.lanl.gov/abs/hep-th/9410046 "Kaluza-Klein Theory in Perspective"*] , (1994).

* A. Burinskii, [*http://arxiv.org/abs/hep-th/0507109 "The Dirac-Kerr electron"*] , (2005) "preprint".

* J. G. Williamson & M. B. van der Mark, Is the electron a photon with toroidal topology? Annales de la Fondation Louis de Broglie, Volume 22, no.2, 133 (1997).

* A. Burinskii, [*http://arxiv.org/abs/0712.0577 "Kerr Geometry as Space-Time Structure of the Dirac Electron"*] , (4 Dec 2007).**Popular literature***

Brian Greene , "" (1999), "(See chapter 13)"

*John A. Wheeler , "Geons, Black Holes & Quantum Foam " (1998), "(See chapter 10)"**External links*** [

*http://adsabs.harvard.edu/abs/2007IJMPD..16..681M The Geometry of the Torus Universe*] , which is related to [*http://www.student.oulu.fi/~taneliha/Phi6/3/Hierarchical_Cantor_set_in_the_large_scale_structure_3_with_torus_geometry.pdf Hierarchical Cantor set in the large scale structure 3 with torus geometry*]

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