Lecturer: Dr. Yuval Vinkler Affiliation: Center for Complex Quantum Systems, Freie University Berlin Abstract: Experimental evidence for Majorana bound states largely relies on measurements of the tunneling conductance. While the conductance into a Majorana state is in principle quantized to $2e^2/h$, observation of this quantization has been elusive, presumably due to temperature broadening in the normal-metal lead. In this talk we will describe a new suggestion to probe Majorana bound states, using a superconducting lead, whose gap strongly suppresses thermal excitations. For a wide range of tunneling strengths and temperatures, a Majorana state is then signaled by symmetric conductance peaks at $eV=\pm\Delta$ of a universal height $G=(4-\pi)2e^2/h$. For a superconducting scanning tunneling microscope tip, Majorana states appear as spatial conductance plateaus while the conductance varies with the local wavefunction for trivial Andreev bound states. We will discuss effects of nonresonant (bulk) Andreev reflections and quasiparticle poisoning. ‏האירוע הזה כולל שיחת וידאו ב-Google Hangouts. הצטרף: https://hangouts.google.com/hangouts/_/mail.huji.ac.il/condensed?hceid=b...