Technical advances that could change the outlook for quantum companies: logical qubits, error correction and fault tolerance, fidelity and scale records, and progress in superconducting, trapped-ion, neutral-atom, photonic and spin systems, interconnects, cryogenics and enabling hardware — with how each compares to the state of the art. Topics and rules ↓
Pasqal used a photonic integrated circuit to trap individual rubidium atoms on a neutral-atom quantum computer, achieving 27.5-second atom lifetimes. The result addresses a hardware barrier for scaling to over 10,000 atoms and 100 logical qubits.
Researchers demonstrated wireless millikelvin interconnects between cryogenic quantum processors and room-temperature control electronics as an alternative to dense electrical wiring. This reduces wiring complexity and thermal loading, addressing a scalability bottleneck.
University of Saskatchewan researchers developed geometry-optimized hyperbolic surface codes that double code distance and quadruple efficiency by optimizing periodic boundary conditions. The breakthrough reduces physical qubit overhead for error correction in modular fault-tolerant quantum architectures.
Researchers demonstrated real-time feedback control on a quantum computer, checking its state while running and resetting parts to correct errors. Published in Nature Physics, this is among the largest demonstrations of a capability essential for fault-tolerant quantum computers.
IonQ demonstrated entanglement rates exceeding 1,000 events per second between a trapped-ion qubit and a silicon-vacancy solid-state quantum memory using a photonic interconnect, more than four times faster than the previous trapped-ion interconnect record. This supports distributed quantum computing.
Researchers demonstrated krypton-assisted growth of low-loss tantalum on silicon achieving state-of-the-art qubit coherence while staying within semiconductor processing thermal budgets. Published in Nature Materials, this addresses enabling hardware for superconducting qubits.
Researchers implemented error-corrected memory and logic on a 156-qubit superconducting processor using a dynamic compass code, achieving up to 35% improvement in logical error rates for memory and up to 56% for measurement-based logic. Bell fidelities exceeded 97% using post-selection techniques.
Researchers introduced error semi-transparent universal logical gates for bosonic codes, achieving a five-fold reduction in infidelity from photon loss and demonstrating composite non-Clifford operations. Published in Nature Communications, this advances fault-tolerant logical operations beyond previous phase-gate-only demonstrations.
IonQ demonstrated kilohertz-rate entanglement between trapped-ion qubits in a heterogeneous quantum network, published on arXiv. Quantum interconnects operating at computation-speed rates are essential for scaling distributed quantum systems.