IQIM Postdoctoral and Graduate Student Seminar

Thursday June 1, 2017 12:00 PM

Coulomb blockade in one-dimensional fractional topological superconductors

Speaker: Roman Lutchyn, Station Q, Microsoft Research, Santa Barbara
Location: East Bridge 114

Abstract: In this talk I will discuss charge transport through a floating mesoscopic superconductor (i.e. superconducting island with appreciable charging energy) coupled to the counterpropagating fractional quantum Hall edges at the filling fraction $nu=2/3$. I will present our recent results for the conductance through such a device as a function of temperature and gate voltage applied to a superconducting island, and show that transport is strongly affected by the presence of parafermionic zero modes. However, unlike in the corresponding Majorana case where the current through the device is strongly dependent on the gate voltage, the differential conductance here is quantized in units of $\nu e^2/h$ at zero temperature for an arbitrary value of an applied gate voltage.

 

Series IQIM Postdoctoral and Graduate Student Seminar Series

Contact: Marcia Brown at 626-395-4013 marciab@caltech.edu