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- W1983258001 abstract "We study the low-temperature transport properties of systems of parallel quantum dots described by the $N$-impurity Anderson model. We calculate the quasiparticle scattering phase shifts, spectral functions, and correlations as a function of the gate voltage for $N$ up to 5. For any $N$, the conductance at the particle-hole symmetric point is unitary. For $Nensuremath{ge}2$, a transition from ferromagnetic to antiferromagnetic impurity spin correlations occurs at some gate voltage. For $Nensuremath{ge}3$, there is an additional transition due to an abrupt change in average impurity occupancy. For odd $N$, the conductance is discontinuous through both quantum phase transitions, while for even $N$ only the magnetic transition affects the conductance. Similar effects should be experimentally observable in systems of quantum dots with ferromagnetic conduction-band-mediated interdot exchange interactions." @default.
- W1983258001 created "2016-06-24" @default.
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- W1983258001 date "2007-12-18" @default.
- W1983258001 modified "2023-10-16" @default.
- W1983258001 title "Quantum phase transitions in systems of parallel quantum dots" @default.
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- W1983258001 doi "https://doi.org/10.1103/physrevb.76.241305" @default.
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