AI Article Synopsis
- Double quantum dots allow for the exploration of complex many-body interactions in quantum systems.
- In the studied system, a Kondo dot interacts with a noninteracting dot, which behaves like a single-impurity Anderson model with a varying density of states.
- Numerical simulations indicate that although the Kondo resonance is affected by band filtering, the overall singlet ground state remains stable, and the system can be adjusted to reach a critical point between Kondo and non-Kondo phases.
Article Abstract
Double quantum dots offer unique possibilities for the study of many-body correlations. A system containing one Kondo dot and one effectively noninteracting dot maps onto a single-impurity Anderson model with a structured (nonconstant) density of states. Numerical renormalization-group calculations show that, while band filtering through the resonant dot splits the Kondo resonance, the singlet ground state is robust. The system can also be continuously tuned to create a pseudogapped density of states and access a quantum-critical point separating Kondo and non-Kondo phases.
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| http://dx.doi.org/10.1103/PhysRevLett.97.096603 | DOI Listing |
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