ELFT HÍRADÓ

[tcsaba <tcsaba AT eik.bme.hu>]

                 M E G H Í V Ó - I N V I T A T I O N

    Seminar Series of the Department of Theoretical Physics at the
           Budapest University of Technology and Economics

                           Szabolcs Csonka
       (Department of Physics, Budapest University of Technology)

              Topologically protected ground state
                degeneracies in a two-spin system


Semiconductor nanowires became one of the most intensively studied 
system in quantum electronics in the last few years. With properly 
designed gate electrodes artificial atoms  can be created in these 
nanowires. These can trap electrons which can store quantum information 
due to their spin. In this work the ground state of double quantum dot 
is studied in external magnetic field by inelastic co-tunnelling 
spectroscopy. The microscopic description of the system is complex due 
to the presence of strong spin-orbit interaction, spin-dependent 
tunneling and anisotropic Zeeman effect. However, we will show that 
using topological considerations one can formulate general predictions 
on the ground state of the system, which is verified by our 
measurements.


Időpont: 2017. október 27. péntek, 10:15
Helyszín: BME Fizikai Intézet, Elméleti Fizika Tanszék,
Budafoki út 8. F-épület, III lépcsőház, szemináriumi szoba