Qiskit Fall Fest 2026: MalaysiaProgress at the interfaces

Researchers led by the University of Science and Technology of China and Guangdong University of Technology experimentally combined quantum optics with relativistic timing to test whether an untrusted prover was at a claimed location. Two verifiers separated by two kilometres sent classical challenges and phase-randomised weak coherent states. Low-latency optical links and FPGA-based lookup tables let the peer-reviewed protocol verify the prover’s position to better than 75 metres.

The experiment matters because classical messages can be copied and relayed, whereas quantum states make interception detectable and light-speed timing constrains where an answer can originate. It is a controlled proof of principle, not a GPS replacement: the apparatus used hollow-core fibre, superconducting detectors and 10 million protocol rounds, and its security rests on explicit bounds on an attacker’s quantum resources. Longer links, field conditions and broader adversary models remain open tests.

Spiros Kechrimparis, Mile Gu and Hyukjoon Kwon introduced “process causal asymmetry”: a difference between how much information an autonomous model must remember to transform stochastic process A into process B and how much it needs for the reverse transformation. The team, based at the Korea Institute for Advanced Study, Nanyang Technological University, the Centre for Quantum Technologies and MajuLab, constructed cases where the direction preferred by classical memory flips when the model can store quantum information.

The peer-reviewed theory gives a precise resource-based way to ask why some noisy processes appear easier in one direction than another. It does not show time running backwards, and no autonomous quantum agent was built. Its significance is conceptual: quantum memory can change the simplest causal explanation of observed data, with possible implications for quantum simulation and computational modelling. The Singapore-led contribution also reflects the region’s strength in foundational quantum information.

MIT researchers Jeremy B. Kline, Alec Yen, Stanley Chen and Kevin P. O’Brien proposed the “arm qubit”, a superconducting design with two strongly coupled modes: one intended to preserve data and another to connect efficiently to neighbouring elements. The separation addresses a familiar trade-off—strong coupling enables fast gates and readout, but can also expose stored information to loss and unwanted interactions.

In peer-reviewed numerical modelling that included decoherence, the architecture supported a microwave-only controlled-Z gate in 17 nanoseconds with a predicted infidelity of 8.7 × 10⁻⁵, while keeping the always-on interaction below 0.4 kilohertz. Those figures are projections, not measurements from a fabricated device. They depend on assumed component parameters, manufacturing precision and noise models. The next meaningful milestone is therefore experimental fabrication and benchmarking, followed by tests of variability, control complexity and scaling across an array.

Mingxuan Guo and colleagues at Shanghai Jiao Tong University and institutions in Hefei proposed a continuous-variable quantum key distribution scheme that encodes information in optical amplitude without sending a separate phase-reference pilot. Conventional coherent-detection systems use that pilot to align transmitter and receiver phases, but it consumes bandwidth and can create an additional attack surface. The new protocol instead works with a random relative phase and derives secure correlations from amplitude-encoded coherent states.

The peer-reviewed paper supplies a security analysis against collective attacks, simulated key-rate estimates and proof-of-principle tests over fibre and free-space optical paths. It is an early accepted article, not a field-deployed network demonstration; the work does not establish production-scale distance, throughput or operation under all implementation attacks. Still, removing a dedicated pilot could simplify mixed fibre/free-space architectures if subsequent experiments confirm robust performance under realistic loss and turbulence.

Researchers from Rigetti Computing and Purdue University described a hybrid “quantum preconditioning” method for balanced graph bipartitioning. Correlations generated from the Quantum Approximate Optimisation Algorithm reshape the objective given to a mixed-integer programming solver, while the original balance constraint and objective remain the standards for accepting solutions. Across 50 dense weighted graphs with 12 to 40 vertices, the preconditioned search often found near-optimal incumbents sooner.

The preprint is best read as an algorithm-design result, not a quantum speed-up. The correlations were produced using a closed-form calculation at the shallowest depth and exact state-vector emulation at greater depth; no quantum processor was used. Their generation time was also excluded from the classical solver timings. The reported gains show that problem-specific correlation information can steer a branch-and-bound search, but an end-to-end resource comparison on hardware is still needed before making an advantage claim.

RIKEN has put QunaSys’s QURI SDK Enterprise into operation on Japan’s JHPC-quantum platform. The software layer links the Fugaku supercomputer and RIKEN’s ROQUO environment with two distinct quantum systems: the superconducting IBM Quantum System Two known as ibm_kobe and Quantinuum’s trapped-ion H2 system, Reimei. Researchers can construct hybrid workflows and use methods including quantum-selected configuration interaction and its adaptive variant.

The importance lies in orchestration. Useful scientific studies increasingly require classical preprocessing, quantum circuit execution and classical post-processing to share data and computing resources reliably across different machines. This announcement establishes infrastructure for that work; it is not an application benchmark and does not demonstrate quantum advantage. Access policy, queueing, portability between hardware types and reproducibility will determine how valuable the platform becomes. For Asia’s research community, however, a multi-vendor quantum–HPC environment is a meaningful capacity-building step.