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- Quantum_foam abstract "Quantum foam (also referred to as space-time foam) is a concept in quantum mechanics devised by John Wheeler in 1955. The foam is supposed to be conceptualized as the foundation of the fabric of the universe.Additionally, quantum foam can be used as a qualitative description of subatomic space-time turbulence at extremely small distances (on the order of the Planck length). At such small scales of time and space, the Heisenberg uncertainty principle allows energy to briefly decay into particles and antiparticles and then annihilate without violating physical conservation laws. As the scale of time and space being discussed shrinks, the energy of the virtual particles increases. According to Einstein's theory of general relativity, energy curves space-time. This suggests that—at sufficiently small scales—the energy of these fluctuations would be large enough to cause significant departures from the smooth space-time seen at larger scales, giving space-time a "foamy" character.With an incomplete theory of quantum gravity, it is impossible to be certain what space-time would look like at these small scales, because existing theories of gravity do not give accurate predictions in that regime. Therefore, any of the developing theories of quantum gravity may improve our understanding of quantum foam as they are tested. However, observations of radiation from nearby quasars by Floyd Stecker of NASA's Goddard Space Flight Center have placed strong experimental limits on the possible violations of Einstein's special theory of relativity implied by the existence of quantum foam. Thus experimental evidence so far has given a range of values in which scientists can test for quantum foam.".
- Quantum_foam wikiPageExternalLink 0307003.pdf.
- Quantum_foam wikiPageExternalLink article.cfm?id=borrowed-time-interview-w.
- Quantum_foam wikiPageID "364380".
- Quantum_foam wikiPageRevisionID "606757464".
- Quantum_foam hasPhotoCollection Quantum_foam.
- Quantum_foam subject Category:Foams.
- Quantum_foam subject Category:Quantum_field_theory.
- Quantum_foam subject Category:Quantum_gravity.
- Quantum_foam subject Category:Wormhole_theory.
- Quantum_foam type Abstraction100002137.
- Quantum_foam type Attribute100024264.
- Quantum_foam type Ball113899404.
- Quantum_foam type Bubble109229709.
- Quantum_foam type Foam109282724.
- Quantum_foam type Foams.
- Quantum_foam type Globule109289709.
- Quantum_foam type RoundShape113865483.
- Quantum_foam type Shape100027807.
- Quantum_foam type Sphere113899200.
- Quantum_foam comment "Quantum foam (also referred to as space-time foam) is a concept in quantum mechanics devised by John Wheeler in 1955. The foam is supposed to be conceptualized as the foundation of the fabric of the universe.Additionally, quantum foam can be used as a qualitative description of subatomic space-time turbulence at extremely small distances (on the order of the Planck length).".
- Quantum_foam label "Espuma cuántica".
- Quantum_foam label "Espuma quântica".
- Quantum_foam label "Kwantumschuim".
- Quantum_foam label "Mousse quantique".
- Quantum_foam label "Quantenschaum".
- Quantum_foam label "Quantum foam".
- Quantum_foam label "量子泡沫".
- Quantum_foam sameAs Kvantová_pěna.
- Quantum_foam sameAs Quantenschaum.
- Quantum_foam sameAs Espuma_cuántica.
- Quantum_foam sameAs Mousse_quantique.
- Quantum_foam sameAs Kwantumschuim.
- Quantum_foam sameAs Espuma_quântica.
- Quantum_foam sameAs m.01_tn2.
- Quantum_foam sameAs Q616432.
- Quantum_foam sameAs Q616432.
- Quantum_foam sameAs Quantum_foam.
- Quantum_foam wasDerivedFrom Quantum_foam?oldid=606757464.
- Quantum_foam isPrimaryTopicOf Quantum_foam.