Silence, please: quietest semiconductor quantum bits on record
9 October 2020 — Charge noise (interference caused by imperfections in the material hosting a qubit) is one of the key obstacles standing between prototype devices and the large-scale, error-corrected quantum computers of the future. Reducing it is essential: for a two-qubit gate to meet the accuracy threshold needed for useful quantum computation, fidelity must exceed 99%.
In research published in Advanced Materials, Silicon Quantum Computing (SQC) demonstrated a charge noise level ten times lower than any previously recorded in a semiconductor qubit. The result was achieved leveraging SQC's atomic-scale manufacturing process, reducing impurities and positioning atoms away from the surface where most noise originates.
Read the UNSW newsroom coverage:
Quietest semiconductor quantum bits on record
Read the peer-reviewed article in Advanced Materials:
Exploiting a Single-Crystal Environment to Minimize the Charge Noise on Qubits in Silicon
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