Quantum phase transitions in the systems of parallel quantum dots
| dc.creator | Zitko, Rok | |
| dc.creator | Bonca, Janez | |
| dc.date | 2007-11-30 | |
| dc.date.accessioned | 2026-07-07T12:48:49Z | |
| dc.date.available | 2026-07-07T12:48:49Z | |
| dc.description | We study the low-temperature transport properties of the 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 N >= 2, a transition from ferromagnetic to antiferromagnetic impurity spin correlations occurs at some gate voltage. For N >= 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 the systems of quantum dots with ferromagnetic conduction-band-mediated inter-dot exchange interactions. | |
| dc.description | 5 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0711.4884 | |
| dc.identifier | http://arxiv.org/abs/0711.4884 | |
| dc.identifier | Phys. Rev. B 76, 241305(R) (2007) | |
| dc.identifier | doi:10.1103/PhysRevB.76.241305 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/222189 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Quantum phase transitions in the systems of parallel quantum dots | |
| dc.type | text |