Heavy Baryon Chiral Perturbation Theory

Universal conductance fluctuations (UCF) in quantum physics is a phenomenon encountered in electrical transport experiments in mesoscopic species. The measured electrical conductance will vary from sample to sample, mainly due to inhomogeneous scattering sites. Fluctuations originate from coherence effects for electronic wavefunctions and thus the phase-coherence length $l_{\varphi }$ needs be larger than the momentum relaxation length $l_m$. UCF is more profound when electrical transport is in weak localization regime. $l_{\varphi }>l_c$ where $l_c=M\times l_m$ , $M$ is the number of conduction channels and $l_m$is the momentum relaxation length or mean free path. For weakly localized samples fluctuation in conductance is equal to fundamental conductance $G_o=2e^2/h$ regardless of the number of channels.

See also

• Speckle patterns, the optical analogues of conductance fluctuation patterns.

References

• Akkermans and Montambaux, Mesoscopic Physics of Electrons and Photons, Cambridge University Press (2007)
• S. Datta, Electronic Transport in Mesoscopic Systems, Cambridge University Press (1995)
• R. Saito, G. Dresselhaus and M. S. Dresselhaus, Physical Properties of Carbon Nanotubes, Imperial College Press (1998)
• Template:Cite doi
• Altshuler, B. L. (1985), Pis'ma Zh. Eksp. Teor. Fiz. 41: 530 [JETP Lett. 41: 648]

References

43 year old Petroleum Engineer Harry from Deep River, usually spends time with hobbies and interests like renting movies, property developers in singapore new condominium and vehicle racing. Constantly enjoys going to destinations like Camino Real de Tierra Adentro.