IBM Research

2 posts

From error mitigation to fault-tolerant quantum computing ibm.com
IBM’s blog outlines a practical continuum from quantum error mitigation to fault‑tolerant error correction, highlighting hybrid spacetime codes that achieve ~10× effective error‑rate reduction (64 logical qubits on 76 physical qubits) and a 63× sampling‑overhead cut versus pure mitigation. It describes how post‑selected QEC combined with probabilistic error cancellation, dynamic circuits, and a n…
IBM Researchibm.com7d10 min
A theoretical separation between quantum computers & LLMs ibm.com
The IBM research blog explains two new theoretical results that prove shallow constant‑depth quantum circuits can outperform decoder‑only transformers on a functional task (iterated index) and diffusion language models on a sampling task (parity‑sampling). The proofs give asymptotic separations but are not yet practical.
IBM Researchibm.comSrinivasan Arunachalam, Arkopal Dutt, Hari Krovi, Rik Sengupta, Ryan Mandelbaum7d6 min

From error mitigation to fault-tolerant quantum computingibm.com