| Issue |
EPL
Volume 103, Number 5, September 2013
|
|
|---|---|---|
| Article Number | 57006 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/103/57006 | |
| Published online | 23 September 2013 | |
Realization of a two-channel Kondo model with Josephson junction networks
1 Dipartimento di Fisica, Università della Calabria and INFN, Gruppo Collegato di Cosenza Arcavacata di Rende, I-87036, Cosenza, Italy, EU
2 International Institute of Physics, Universidade Federal do Rio Grande do Norte - 59012-970, Natal, Brazil
3 INFN, Sezione di Perugia - Via A. Pascoli, I-06123, Perugia, Italy, EU
Received: 22 July 2013
Accepted: 28 August 2013
We show that —in the quantum regime— a Josephson junction rhombi chain (i.e. a Josephson junction chain made by rhombi formed by joining 4 Josephson junctions) may be effectively mapped onto a quantum Hamiltonian describing Ising spins in a transverse magnetic field with open boundary conditions. Then, we elucidate how a Y-shaped network fabricated with 3 Josephson junction rhombi chains may be used as a quantum device realizing the two-channel Kondo model recently proposed by Tsvelik in Phys. Rev. Lett., 110 (2013) 147202. We point out that the emergence of a 2-channel Kondo effect in this superconducting network may be probed through the measurement of a pertinent Josephson current.
PACS: 75.10.Pq – Spin chain models / 74.81.Fa – Josephson junction arrays and wire networks / 72.10.Fk – Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect)
© EPLA, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.