Topic
Qubits and quantum devices research, explained
5 open-access qubits and quantum devices studies, each with a flashcard deck and a quiz.
- Can ordinary silicon host fast, accurate spin qubits?
A carefully designed tiny magnet let electron spins in ordinary (non-purified) silicon be flipped fast enough and cleanly enough to pass the error threshold for fault-tolerant quantum computing.
- Can a diamond quantum sensor take high-resolution NMR of tiny volumes?
Separating the magnetising step from the diamond-based detection step let researchers record NMR spectra ten times sharper than earlier diamond sensors, enough for two-dimensional NMR on picolitre volumes.
- Does purified silicon make an all-electric spin qubit quieter?
Using isotopically purified silicon, a three-dot spin qubit controlled only by voltages kept its phase hundreds of times longer than in gallium arsenide, leaving charge noise as the main limit.
- Can a laser fix mistuned qubits on a quantum chip?
Briefly heating individual qubit junctions with a laser sets their frequencies precisely enough to avoid clashes between neighbours, without harming how long the qubits stay coherent.
- Can blocking sound waves make qubit-damaging defects live longer?
Atomic-scale defects inside superconducting qubit junctions lived about a hundred times longer when their frequency fell inside an engineered band where sound waves (phonons) cannot travel.