Insulating state in open quantum dots and quantum dot arrays

A model for many-body interaction effects in open quantum dot systems

“…Similar scaling behaviour of the conductance and resistance peaks has been observed in experimental studies of coupled open quantum dots [7,[9][10][11].…”

“…Recent experimental results [7][8][9][10][11] investigating the temperature dependence of conductance fluctuations in open dots and dot arrays show good agreement with the single-particle theory [1][2][3]12] at high temperatures. At lower temperatures however, deviations from the single-particle picture have been observed, with clearly resolved metal-like and insulator-like phases in the conductance maxima and minima, respectively [7][8][9][10][11]. Magneto-transport measurements and results for reference samples without quantum dots clearly rule out weak localization effects of the electron gas as the origin of the deviations [10,13,14].…”

“…The projection of the propagating single-particle states of the open dot system onto the discrete eigenstates of the closed system reflects strong resonances at individual, discrete closed-dot states, representing exactly those states of localized charge inside the quantum dot [3,4]. Recent experimental results [7][8][9][10][11] investigating the temperature dependence of conductance fluctuations in open dots and dot arrays show good agreement with the single-particle theory [1][2][3]12] at high temperatures. At lower temperatures however, deviations from the single-particle picture have been observed, with clearly resolved metal-like and insulator-like phases in the conductance maxima and minima, respectively [7][8][9][10][11].…”