User:Greg L/Fuzzballs (string theory): Difference between revisions

 

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{{Short description|Quantum description of black holes}}

{{Short description|Quantum description of black holes}}

{{string theory}}

{{string theory}}

”’Fuzzball theory”’, which is derived from [[superstring theory]], is advanced by its proponents as a description of [[black holes]] that harmonizes [[quantum mechanics]] and [[Albert Einstein]]‘s [[General relativity|general theory of relativity]], which have long been incompatible.

”’Fuzzball theory”’, which is derived from [[superstring theory]], is advanced by its proponents as a description of [[black holes]] that harmonizes [[quantum mechanics]] and [[Albert Einstein]] [[General relativity|general theory of relativity]], which have long been incompatible.

Fuzzball theory dispenses with the singularity at the heart of a black hole by positing that the entire region within the black hole’s [[event horizon]] is actually an extended object: a ball of strings, which are advanced as the ultimate building blocks of matter and light. Under [[string theory]], strings are bundles of energy vibrating in complex ways in both the three physical dimensions of space as well as in ”compact directions”—extra dimensions interwoven in the [[quantum foam]] (see [[#String_theory_and_composition|”Fig. 2”]] and [[#Testability_of_the_theory|”Fig. 9”]], below).[https://www.quantamagazine.org/how-fuzzballs-solve-the-black-hole-firewall-paradox-20150623/ “The Fuzzball Fix for a Black Hole Paradox”], Jennifer Ouellette, ”Quanta Magazine”, (June 23, 2015)

Fuzzball theory dispenses with the singularity at the heart of a black hole by positing that the entire region within the black [[event horizon]] is actually an extended object: a ball of strings, which are advanced as the ultimate building blocks of matter and light. Under [[string theory]], strings are bundles of energy vibrating in complex ways in both the three physical dimensions of space as well as in ”compact directions”—extra dimensions interwoven in the [[quantum foam]] (see [[#String_theory_and_composition|”Fig. 2”]] and [[#Testability_of_the_theory|”Fig. 9”]], below).[https://www.quantamagazine.org/how-fuzzballs-solve-the-black-hole-firewall-paradox-20150623/ Fuzzball Fix for a Black Hole ], Jennifer Ouellette, ”Quanta Magazine”, (June 23, 2015)

Fuzzball theory addresses two intractable problems that classic black hole theory poses for modern physics:

Fuzzball theory addresses two intractable problems that classic black hole theory poses for modern physics:

# It dispenses with the [[gravitational singularity]] at the heart of the black hole, which is thought to be surrounded by an [[event horizon]], the inside of which is detached from the space and time—[[spacetime]]—of the rest of the universe (see {{nowrap|”Fig. 1” ).}} Conventional black hole theory holds that a singularity is a zero-dimensional, zero-volume point in which all of a black hole’s mass exists at infinite density.