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Leviton (quasiparticle)

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A leviton, named after Leonid Levitov,[1][2] is a collective excitation of a single electron within a metal.[1][2][3][4] It has been mostly studied in two-dimensional electron gases alongside quantum point contacts. The main feature is that the excitation produces an electron pulse without the creation of electron holes. The time-dependence of the pulse is described by a Lorentzian distribution created by a pulsed electric potential.[1][2]

Levitons have also been described in graphene.[5][6]

References

  1. ^ a b c "New 'leviton' quasiparticle spotted by physicists". physicsworld.com. Retrieved 2013-11-27.
  2. ^ a b c Dubois, J.; Jullien, T.; Portier, F.; Roche, P.; Cavanna, A.; Jin, Y.; Wegscheider, W.; Roulleau, P.; Glattli, D. C. (31 October 2013). "Minimal-excitation states for electron quantum optics using levitons" (PDF). Nature. 502 (7473): 659–663. Bibcode:2013Natur.502..659D. doi:10.1038/nature12713. PMID 24153178.
  3. ^ "Researchers produce the first experimental pulse-generation of a single electron—a leviton". Phys.org. Retrieved 2013-11-27.
  4. ^ Francis, Matthew (2013-10-23). "New type of quantum excitation behaves like a solitary particle". Nature. 502 (7473). Ars Technica: 659–63. Bibcode:2013Natur.502..659D. doi:10.1038/nature12713. PMID 24153178. Retrieved 2013-11-27.
  5. ^ Forrester, Derek Michael; Kusmartsev, Feodor V. (May 13, 2014). "Graphene levitons and anti-levitons in magnetic fields". Nanoscale. 6 (13): 7594–7603. Bibcode:2014Nanos...6.7594F. doi:10.1039/C4NR00754A. PMID 24893578.
  6. ^ Forrester, Derek Michael (1 January 2015). "Confinement effects of levitons in a graphene cosmology laboratory" (PDF). RSC Advances. 5 (7): 5442–5449. doi:10.1039/C4RA11227J.


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