This is a narrow constriction in a ring of superconductor. Current can only move around the ring because of quantum laws; the apparatus provides a neat way to investigate the properties of quantum mechanics and is a technology to build qubits for quantum computers.
SHORTLISTED | Quantum Shorts 2012
Who killed Schroedinger’s cat?
Directed by Giannicola Scarpa – written by Cristina-Iulia Bucur and Giannicola Scarpa – with Harry Buhrman, Juan Martinez and Deniz Uğurlar