Triple Andreev dot chains in semiconductor nanowires

Understand

Kitaev chain is a theoretical model of a one-dimensional topological superconductor with Majorana zero modes at the two ends of the chain.

• With the goal of emulating this model, we build a chain of three quantum dots in a semiconductor nanowire.
• We observe Andreev bound states in each of the three dots and study their magnetic field and gate voltage dependence.
• Theory indicates that triple dot states acquire Majorana polarization when Andreev states in all three dots reach zero energy in a narrow range of magnetic field.