rotonn.

Brit.

/ˈrəʊtɒn/, U.S.

/ˈroʊˌtɑn/

Origin: Formed within English, by derivation. Etymons: rotation n., -on suffix¹.

Etymology: < rot- (in rotation n.) + -on suffix¹.

Physics.

A quantum or quasiparticle associated with vortical motion in a liquid, esp. liquid helium.

ΘΚΠ

the world > matter > physics > quantum theory > [noun] > quasiparticle > types of

exciton1936

roton1941

polaron1946

plasmon1956

polariton1958

soliton1965

1941 L. Landau in Jrnl. Physics U.S.S.R. 5 75/2 An ‘elementary excitation’ of the vortex spectrum might be called a ‘roton’. [Note] This name was suggested by I. E. Tamm.

1947 Physical Rev. 72 852/1 In Landau's theory, the excited atoms of the Bose-Einstein theory are replaced by ‘rotons’.

1957 R. P. Feynman in Rev. Mod. Physics 29 208/1 We would like to calculate the cross section for the collision of two rotons.

1973 Nature 9 Nov. 66/1 A new type of elementary excitation, christened the ³He roton, may exist in liquid ³He–⁴He mixtures.

2002 C. J. Pethick & H. Smith Bose–Einstein Condensation in Dilute Gases i. 8 For excitation energies greater than 2Δ the excitations become less well-defined since they can decay into two rotons.

This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2022).

单词	roton
释义	rotonn. Brit. /ˈrəʊtɒn/, U.S. /ˈroʊˌtɑn/ Origin: Formed within English, by derivation. Etymons: rotation n., -on suffix¹. Etymology: < rot- (in rotation n.) + -on suffix¹. Physics. A quantum or quasiparticle associated with vortical motion in a liquid, esp. liquid helium. ΘΚΠ the world > matter > physics > quantum theory > [noun] > quasiparticle > types of exciton1936 roton1941 polaron1946 plasmon1956 polariton1958 soliton1965 1941 L. Landau in Jrnl. Physics U.S.S.R. 5 75/2 An ‘elementary excitation’ of the vortex spectrum might be called a ‘roton’. [Note] This name was suggested by I. E. Tamm. 1947 Physical Rev. 72 852/1 In Landau's theory, the excited atoms of the Bose-Einstein theory are replaced by ‘rotons’. 1957 R. P. Feynman in Rev. Mod. Physics 29 208/1 We would like to calculate the cross section for the collision of two rotons. 1973 Nature 9 Nov. 66/1 A new type of elementary excitation, christened the ³He roton, may exist in liquid ³He–⁴He mixtures. 2002 C. J. Pethick & H. Smith Bose–Einstein Condensation in Dilute Gases i. 8 For excitation energies greater than 2Δ the excitations become less well-defined since they can decay into two rotons. This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2022). < n.1941
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