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- W1995363949 abstract "The dephasing due to electron–electron Coulomb interactions is studied for open mesoscopic cavities in the diffusive regime where l /λ F ≫1 ( l : elastic mean free path, λ F : Fermi wavelength). We consider a square cavity with area L × L , which is connected to reservoirs through a pair of thin leads of width W . It is assumed that L ≫ W ≫ l . The system is characterized by the lowest eigenvalue Γ 0 of a diffusion equation. We find that the temperature dependence of the dephasing time τ φ changes whether temperature T is higher or lower than T cross ≡Γ 0 / k B . It is shown that τ φ behaves as τ φ -1 ∝ T when T ≫ T cross . If T is decreased below T cross , the T -dependence of τ φ crosses over to τ φ -1 ∝ T 2 . It is also shown that in the high-temperature regime of T ≫ T cross , the dephasing time is greatly reduced in comparison with that in an ordinary two-dimensional system." @default.
- W1995363949 created "2016-06-24" @default.
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- W1995363949 date "2003-02-15" @default.
- W1995363949 modified "2023-10-18" @default.
- W1995363949 title "Anomalous Behavior of the Dephasing Time in Open Diffusive Cavities" @default.
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- W1995363949 doi "https://doi.org/10.1143/jpsj.72.233" @default.
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