Skip to main content
Sergey Frolov
event
CAMP Seminar: Status of the search for Majorana zero modes in semiconductor nanowires
Add to Calendar 2019-10-28T19:45:00 2019-10-28T21:00:00 America/New_York CAMP Seminar: Status of the search for Majorana zero modes in semiconductor nanowires

Host: Jun Zhu

Davey Lab (339)
Start DateMon, Oct 28, 2019
3:45 PM
to
End DateMon, Oct 28, 2019
5:00 PM
Presented By
Sergey Frolov, Univeristy of Pittsburgh

CAMP Seminar

Majorana modes are non-trivial quantum excitations that have remarkable topological properties and can be used to protect quantum information against decoherence. Tunneling spectroscopy measurements on one-dimensional superconducting hybrid materials have revealed signatures of Majorana zero modes which are the edge states of a bulk topological superconducting phase. We couple strong spin-orbit semiconductor InSb nanowires to conventional superconductors (NbTiN, Al) to obtain additional signatures of Majorana modes and to explore the topological phase transition. A potent alternative explanation for many of the recent experimental Majorana reports is that a non-topological Andreev state localizes near the end of a nanowire. We compare Andreev and Majorana modes and investigate ways to clearly distinguish the two phenomena. We explore new materials combinations in the broad superconductor-semiconductor family to find a perfect pair for the realization of topological quantum bits. I will present our progress towards assembling the apparatus for the future Majorana fusion and braiding experiments.