RQC Seminar

184th RQC Seminar

• Speaker

  Dr. Ben Criger
  ( Quantinuum Ltd. )

• Date

  13:00-14:00 (1:00 p.m. -2:00 p.m.), January 31, 2025 (Friday)

• Venue

  Hybrid(ZOOM・ Wako Main Research 3F 345-347 Seminar Room / 研究本館3階 セミナー室(345-347) C01）

• Title

  One-Bit Addition with the Smallest Interesting Colour Code

• Inquiries

  nori_rqc_assist[at]ml.riken.jp

Abstract
There are fault-tolerant quantum computing techniques available to enhance the success probability of algorithms we wish to run, but the overheads associated with these techniques make most of them impossible to execute on available devices. In addition, fault-tolerant procedures that inflict large overheads also induce larger-than-necessary logical error rates. The dominant source of overhead in current fault-tolerant circuits is magic state distillation, which is necessary to perform non-Clifford gates in many fault-tolerant protocols using stabilizer codes. By contrast, there exist some quantum codes possessing transversal non-Clifford gates, facilitating fault-tolerant universal quantum computation without state distillation. In this work, we focus on an eight-qubit code, the "Smallest Interesting Colour Code", demonstrating low-overhead procedures for Clifford operations and Pauli measurements, culminating in a fault-tolerant implementation of one-bit addition with 10 qubits and 26 CNots, suppressing the probability of classically detectable errors by a factor of almost 10.