Quantized Majorana conductance

[shpalman]

Sergey's talk is on his youtube channel at https://youtu.be/_3t0iIs8xxc

[shpalman]

Huh, the intersection of graphene-based nonsense and quantum Majorana nonsense.

“Two decades after its discovery, graphene remains a fascinating material,” says Youngjoon Choi, an assistant professor in physics at Pohang University of Science and Technology (POSTECH) in Pohang, South Korea.

“By using graphene to create a topological superconductor, it should be possible to form protected qubits that are predicted to be immune to external noise. Achieving that could revolutionize the field.”

I'm not even sure what kind of superconductivity has been seen or is to be expected in graphene. You might have to stack 2-3 layers of it with a "magic" angle of twist between the layers. As if getting one good layer where you needed it wasn't hard enough.
https://news.mit.edu/2025/physicists-me ... phene-0205
https://news.mit.edu/2025/physicists-ob ... phene-1106

[dyqik]

I'm not even sure what kind of superconductivity has been seen or is to be expected in graphene. You might have to stack 2-3 layers of it with a "magic" angle of twist between the layers. As if getting one good layer where you needed it wasn't hard enough.

Nah, it's easy. You just keep getting grad students to scatter graphene across a wafer, and then look for the bits with the right stack up.

You will need a good supply of grad students.