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Detecting a quantum critical point in topological SN junctions
Yashar Komijani, Ian Affleck
A spin-orbit coupled quantum wire, with one end proximate to an s-wave superconductor, can become a topological superconductor, with a Majorana mode localized at each end of the su…
Effect of Disorder on the Conductance of (non-) Topological SN Junctions
Yashar Komijani, Ian Affleck
General multi-channel SN junctions fall into two topological classes depending on whether or not there is a Majorana mode localized at the junction. This is known to lead to differ…
The dc Josephson current in a long multi-channel quantum wire
Domenico Giuliano, Ian Affleck
The dc Josephson current across a multi-channel SNS junction is computed by summing contributions from sub-gap Andreev bound states, as well as from continuum states propagating wi…
Exactly conserved quasilocal operators for the XXZ spin chain
R. G. Pereira, V. Pasquier, J. Sirker +1
We extend T. Prosen's construction of quasilocal conserved quantities for the XXZ model [Phys. Rev. Lett. 106, 217206 (2011)] to the case of periodic boundary conditions. These qua…
Screening Clouds and Majorana Fermions
Ian Affleck, Domenico Giuliano
Ken Wilson developed the Numerical Renormalization Group technique which greatly enhanced our understanding of the Kondo effect and other quantum impurity problems. Wilson's NRG al…