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.
Researchers demonstrated wireless millikelvin interconnects between cryogenic quantum processors and room-temperature control electronics, addressing a major scalability bottleneck. The team, led by Kristopher Barr and Alessandro Rossi at the University of Glasgow, showed wireless excitation of a superconducting microwave resonator operating inside a dilution refrigerator. By directly comparing wired and wireless operation in the same cryogenic environment, they confirmed that wireless coupling preserves the intrinsic resonator response. This approach reduces wiring complexity and thermal loading compared to dense electrical interconnects, offering a complementary solution to cryogenic CMOS and microwave-to-optical transduction.