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- Roton abstract "In theoretical physics, a roton is an elementary excitation, or quasiparticle, in superfluid helium-4. The dispersion relation of elementary excitations in this superfluid shows a linear increase from the origin, but exhibits first a maximum and then a minimum in energy as the momentum increases. Excitations with momenta in the linear region are called phonons; those with momenta close to the minimum are called rotons. Excitations with momenta near the maximum are sometimes called maxons.Originally, the roton spectrum was phenomenologically introduced by Lev Landau. Currently there exist different models which try to explain the roton spectrum, with a different degree of success and fundamentality. The requirement for any model of such kind is that it must explain not only the shape of the spectrum itself but also other related observables, such as the speed of sound and structure factor of superfluid helium-4. Microwave and Bragg spectroscopy has been conducted on helium to study roton spectrum.Bose-Einstein condensation of rotons has been proposed and studied, but not yet detected.The term "roton" is also used for the quantised eigenmode of a freely rotating molecule.".
- Roton wikiPageExternalLink RevModPhys.29.205.
- Roton wikiPageID "393148".
- Roton wikiPageLength "2946".
- Roton wikiPageOutDegree "23".
- Roton wikiPageRevisionID "667334493".
- Roton wikiPageWikiLink Bose-Einstein_condensation_of_quasiparticles.
- Roton wikiPageWikiLink Bose–Einstein_condensate.
- Roton wikiPageWikiLink Category:Quasiparticles.
- Roton wikiPageWikiLink Dispersion_relation.
- Roton wikiPageWikiLink Eigenmode.
- Roton wikiPageWikiLink Energy.
- Roton wikiPageWikiLink Lev_Landau.
- Roton wikiPageWikiLink Linear.
- Roton wikiPageWikiLink Linearity.
- Roton wikiPageWikiLink Macroscopic_quantum_phenomena.
- Roton wikiPageWikiLink Maxon_excitation.
- Roton wikiPageWikiLink Momentum.
- Roton wikiPageWikiLink Normal_mode.
- Roton wikiPageWikiLink Phonon.
- Roton wikiPageWikiLink Quasiparticle.
- Roton wikiPageWikiLink Rotational_spectroscopy.
- Roton wikiPageWikiLink Speed_of_sound.
- Roton wikiPageWikiLink Structure_factor.
- Roton wikiPageWikiLink Superfluid.
- Roton wikiPageWikiLink Superfluid_helium-4.
- Roton wikiPageWikiLink Superfluidity.
- Roton wikiPageWikiLink Theoretical_physics.
- Roton wikiPageWikiLinkText "Roton".
- Roton wikiPageWikiLinkText "roton".
- Roton hasPhotoCollection Roton.
- Roton wikiPageUsesTemplate Template:Other_uses.
- Roton wikiPageUsesTemplate Template:Particles.
- Roton wikiPageUsesTemplate Template:Physics-stub.
- Roton wikiPageUsesTemplate Template:Reflist.
- Roton subject Category:Quasiparticles.
- Roton hypernym Excitation.
- Roton type Agent.
- Roton type Company.
- Roton type Organisation.
- Roton type Particle.
- Roton type Physic.
- Roton type Organization.
- Roton type Agent.
- Roton type SocialPerson.
- Roton type Thing.
- Roton type Q18127.
- Roton type Q43229.
- Roton comment "In theoretical physics, a roton is an elementary excitation, or quasiparticle, in superfluid helium-4. The dispersion relation of elementary excitations in this superfluid shows a linear increase from the origin, but exhibits first a maximum and then a minimum in energy as the momentum increases. Excitations with momenta in the linear region are called phonons; those with momenta close to the minimum are called rotons.".
- Roton label "Roton".
- Roton sameAs روتون.
- Roton sameAs Ратон.
- Roton sameAs Roton_(Physik).
- Roton sameAs Roton_(physique).
- Roton sameAs Roton.
- Roton sameAs Rotone.
- Roton sameAs ロトン.
- Roton sameAs 로톤.
- Roton sameAs Roton.
- Roton sameAs Roton.
- Roton sameAs m.022yr5.
- Roton sameAs Ротон.
- Roton sameAs Roton.
- Roton sameAs Ротон.
- Roton sameAs Q1086480.
- Roton sameAs Q1086480.
- Roton wasDerivedFrom Roton?oldid=667334493.
- Roton isPrimaryTopicOf Roton.