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- W1986135914 abstract "Motivated by a recent experiment (Pecker et al 2013 Nat. Phys. 9 576), we study the stability, with respect to thermal effects, of Friedel and Wigner density fluctuations for two electrons trapped in a one-dimensional quantum dot. Diagonalizing the system exactly, the finite-temperature average electron density is computed. While the weak and strong interaction regimes display a Friedel oscillation or a Wigner molecule state at zero temperature, which as expected smear and melt as the temperature increases, a peculiar thermal enhancement of Wigner correlations in the intermediate interaction regime is found. We demonstrate that this effect is due to the presence of two different characteristic temperature scales: T(F), dictating the smearing of Friedel oscillations, and T(W), smoothing Wigner oscillations. In the early Wigner molecule regime, for intermediate interactions, T(F) < T(W) leading to the enhancement of the visibility of Wigner oscillations. These results complement those obtained within the Luttinger liquid picture, valid for larger numbers of particles." @default.
- W1986135914 created "2016-06-24" @default.
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- W1986135914 date "2014-11-24" @default.
- W1986135914 modified "2023-09-26" @default.
- W1986135914 title "Thermally enhanced Wigner oscillations in two-electron 1D quantum dots" @default.
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- W1986135914 doi "https://doi.org/10.1088/0953-8984/26/50/505301" @default.
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