Quantum criticality in a double-quantum-dot system

Gergely Zaránd*, Chung-Hou Chung, Pascal Simon, Matthias Vojta

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

We discuss the realization of the quantum-critical non-Fermi-liquid state, originally discovered within the two-impurity Kondo model, in double-quantum-dot systems. Contrary to common belief, the corresponding fixed point is robust against particle-hole and various other asymmetries and is unstable only to charge transfer between the two dots. We propose an experimental setup where such charge transfer processes are suppressed, allowing a controlled approach to the quantum-critical state. We also discuss transport and scaling properties in the vicinity of the critical point.

Original languageEnglish
Article number166802
JournalPhysical Review Letters
Volume97
Issue number16
DOIs
StatePublished - 25 Oct 2006

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