Know What's Happening in Quantum
Know What's Happening in Quantum
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QuiX Quantum Achieves First Below‑Threshold Error Mitigation on Photonic Processor
QuiX Quantum announced a breakthrough on its 20‑mode photonic quantum computer, delivering the first below‑threshold error mitigation. The new photon‑distillation gate cut photon‑indistinguishability error by 2.2× and lowered overall system error by 1.2×. The work involved collaborators from NASA’s Quantum AI Lab, the University of Twente and Freie Universität Berlin.
Also developing:
By the numbers: Monarch Quantum raises $55M Series A
Researchers at Politecnico di Milano and collaborators have demonstrated mask‑less direct laser writing to locally modify oxygen stoichiometry in YBCO thin films with sub‑micrometer precision. By adjusting laser power they can either preserve superconductivity or fully suppress it, enabling continuous tuning of critical temperature and carrier density. The method also yields up to a 15 % increase in critical current density through engineered nanoscale oxygen vacancies. This scalable approach opens a pathway to fabricate complex superconducting nanostructures without conventional lithography.
Researchers at the University of Waterloo and the Institute for Quantum Computing have launched Open Quantum Design, the world’s first open‑source, full‑stack quantum computer built on ion‑trapping technology. The non‑profit OQD brings together more than 30 software contributors, dozens of...
Researchers led by Sanz, Annoni, and Wein introduced a quantum Fourier‑transform (QFT) interferometer protocol that dramatically reduces the sample complexity of genuine n‑photon indistinguishability benchmarking. The method attains constant O(1) complexity for prime‑photon counts and sub‑polynomial scaling for other photon...
Phantom Photonics, a Waterloo‑spun quantum‑tech startup, is commercialising ultra‑sensitive quantum sensors that can filter background noise and detect single photons. The devices exploit a robust form of quantum coherence, allowing precise measurements in GPS‑denied environments such as deep‑sea or space....
Researchers at Embry‑Riddle have demonstrated a 117‑fold speedup of the Variational Quantum Eigensolver (VQE) by leveraging just‑in‑time compilation, GPU acceleration and multi‑GPU scaling on an NVIDIA H100 cluster. The optimized workflow shrinks the hydrogen molecule potential‑energy‑surface calculation from roughly ten...
Researchers from Tsinghua University and the Beijing Academy of Quantum Information Sciences have shown that the popular Snake optimizer is mathematically equivalent to Block Coordinate Descent (BCD) for superconducting qubit frequency calibration. By casting the block ordering problem as a...
Researchers at Duke University introduced a protocol that learns unknown quantum Hamiltonians with Heisenberg‑limited precision using only static single‑qubit control fields. The method achieves O(1/ε) total evolution time while keeping field strengths constant, eliminating the need for complex multi‑qubit gates...
Researchers Vasconcelos and Joshi introduced the first unitary, constant‑depth protocols that prepare exact Dicke states. By exploiting global CZ interactions in neutral‑atom and trapped‑ion platforms, they achieve preparation with only polynomially many ancilla qubits. Adding a quantum FAN‑OUT operation upgrades...
Scientists have demonstrated a CMOS‑compatible process for fabricating tantalum nitride (TaN) nanowires and TaN/copper bilayer nanowires on 300 mm silicon wafers. Integrating a copper heatsink increased the Skocpol‑Beasley‑Tinkham β parameter and effective interfacial heat‑transfer efficiency by roughly 100‑fold, yielding near‑unity critical‑to‑retrapping...
A new IEEE study introduces an analytical framework that quantifies how pointing errors degrade quantum key distribution (QKD) performance in optical wireless links. By applying Rayleigh and Hoyt statistical models to beam misalignment, the researchers derived closed‑form expressions for error...
Researchers at Tsinghua University introduced “Fock‑space optics,” a framework that applies classical wave‑optics principles to the photon‑number dimension of quantum states. Using a superconducting microwave resonator, they experimentally reproduced propagation, refraction, lensing and interference with up to 180 photons, establishing...
SpinPulse is an open‑source Python library that simulates spin‑qubit computers at the pulse level while explicitly modelling non‑Markovian noise. The framework converts Qiskit circuits into a native gate set, then into time‑dependent pulse sequences that are numerically integrated under realistic...
Researchers at Grenoble Alpes and collaborators examined interference‑based cos(2) qubits, showing that flower‑mon, KITE and related designs share a common multi‑harmonic SQUID Hamiltonian. Numerical simulations revealed a fundamental trade‑off between charge and flux noise that caps dephasing times to a...
The Technion team introduced a hardware‑efficient Rabi‑Driven Reset (RDR) that continuously cools a high‑Q superconducting cavity without measurement. By applying a strong resonant Rabi drive to a transmon and sideband drives detuned by the Rabi frequency, they engineered an effective...
The authors introduce Tensor Algebra Processing Primitives (TAPP), a C‑based interface that standardises 18 core tensor operations and separates application code from hardware specifics. A reference implementation supports both CPU and GPU back‑ends, emphasizing correctness and ease of integration. Demonstrations...
Researchers at the São Carlos Institute of Physics have combined continuous dynamical decoupling (CDD) with variational minimal‑energy optimal control to create two‑qubit entangling gates with virtually unit fidelity. The unified scheme actively suppresses low‑frequency flux noise, calibration drift, and spurious...
Researchers from the Air Force Research Laboratory demonstrated that Quantum Amplitude Amplification (QAA) can solve combinatorial optimisation problems up to 40 qubits with near‑optimal efficiency. They derived an exact formula for oracle parameters when the cost function is linear, simplifying...
Researchers extend Nielsen's circuit‑complexity framework by incorporating intrinsically non‑invertible gates derived from fusion with topological defects. These gates act as completely positive, trace‑preserving channels between superselection sectors, enabling transitions across distinct conformal families in two‑dimensional CFTs. The optimisation problem shifts...
Researchers Sidan A, Tom Banks and collaborators examine how finite‑entropy density matrices in causal diamonds relate to bulk field theories in AdS/CFT. They prove that a genuine bulk field algebra only emerges in a double‑scaled limit where both the boundary...
Cummings and Heckman introduce a topological equivalence principle showing that topological field theories (TFTs), previously thought to be independent of gravity, actually exhibit a non‑perturbative sensitivity to Newton’s constant via a sum over distinct spacetime configurations. By analyzing asymptotically AdS...
A research team led by Guillermo Currás‑Lorenzo and colleagues has introduced a rigorous mathematical framework that extends phase‑error‑estimation security proofs to quantum key distribution (QKD) systems with correlated pulse sources. The new model directly incorporates encoding correlations caused by practical...
Kominis, Xie, Li and colleagues introduce a model‑agnostic Bell‑type test applied to the latent space of autoencoders, aiming to detect nonclassical correlations in neural representations. Using MNIST‑trained autoencoders, they compute correlation functions across multiple decoding contexts and formulate an information‑theoretic...
Researchers led by Gunhee Cho present a geometry‑ and topology‑informed framework that links quantum states, circuits, and measurements to deterministic classical pipelines implemented on FPGAs. By representing quantum circuits as data‑flow graphs and using streaming linear‑algebra updates, they achieve low‑latency...
Researchers at Viettel High Technology Industries have introduced LOTUS, a Layer‑Ordered Temporally Unified Schedule framework that re‑parameterises QAOA circuits via a Hybrid Fourier‑Autoregressive mapping. By collapsing the high‑dimensional parameter space to a constant‑size representation, LOTUS delivers up to 27.2 % higher...
One thing I didn’t fully appreciate early on while learning quantum error correction is just how far it can deviate from classical intuition. Along the way, I’ve run into some common misconceptions (which I still see often):
BTQ Technologies launched a Bitcoin‑Quantum testnet on Jan. 12, 2026, swapping Bitcoin’s ECDSA signatures for the post‑quantum ML‑DSA scheme. The experiment shows that ML‑DSA signatures are 38–72 times larger, prompting a block‑size increase to 64 MiB. By reproducing Bitcoin‑like transaction flow, the testnet...
Researchers from Middle Tennessee State University and Oak Ridge National Laboratory introduced a quantum‑classical hybrid solver that uses the variational quantum eigensolver (VQE) to tackle the Anderson impurity model (AIM) within dynamical mean‑field theory (DMFT). The solver employs a unified...
In this episode, former Assistant Secretary of Commerce Alejandra Y. Castillo explains how quantum technologies—computing, sensing, and communications—are already maturing and can fuel inclusive regional economic growth. She outlines the federal role in de‑risking early research through the CHIPS and...
Researchers at the University of Luxembourg introduced SO3LR, a machine‑learned force field that reproduces PBE0+MBD density‑functional theory (DFT) results with unprecedented fidelity. Across 23 bio‑relevant small molecules, the model captures both harmonic and anharmonic vibrational frequencies, infrared spectra, and potential‑energy...
Researchers at William & Mary demonstrated that the amplitude of two‑photon Rydberg electromagnetically induced transparency (EIT) resonances changes with the orientation of a static dc electric field relative to laser polarization. By rotating the 780 nm probe and 480 nm coupling laser...
QuSecure unveiled QuProtect R3, an end‑to‑end cryptographic platform built for the quantum era, offering rapid visibility across cloud, on‑premise, and edge environments. The solution’s crypto‑agility engine enables one‑click rotation of ciphers, keys, and algorithms without code changes or downtime. QuProtect R3 unifies...
EeroQ announced a breakthrough control chip that manipulates up to one million electrons—its qubits—using fewer than fifty physical wires. The electrons float on a superfluid‑helium layer, allowing loss‑free, long‑distance transport across the chip. This wiring reduction removes a long‑standing scalability...
WiMi Hologram Cloud Inc. unveiled a Lean Classical‑Quantum Hybrid Neural Network (LCQHNN) that leverages a four‑layer variational quantum circuit to deliver image‑classification accuracy on par with much deeper quantum models. The framework fuses classical convolutional and fully‑connected layers with quantum...
Researchers at Beijing Normal University and HKUST have shown that large‑language‑model (LLM) agents can autonomously perform tensor‑network quantum simulations with roughly 90% success across benchmark tasks such as phase‑transition and photochemical reaction modeling. By embedding 43,000 tokens of curated documentation...
Researchers Carlo Cafaro and James Schneeloch demonstrate that two‑qubit entanglement can be generated along geometrically optimal Hamiltonian paths. By measuring geodesic efficiency, speed efficiency and curvature, they show time‑optimal evolutions follow straight, zero‑curvature trajectories that waste minimal energy. These optimal...
Researchers at OIST and Stanford have shown that excitons—electron‑hole pairs—can drive Floquet engineering far more efficiently than conventional laser light. By generating dense exciton populations in atomically thin semiconductors, they observed pronounced band‑structure hybridization with a Mexican‑hat dispersion using time‑...
In this episode, hosts Frank La Vigne and Candace Gillhoolley interview James Davies, founder of Embedded Electronics Recruitment Solutions, about the rapid commercialization of quantum technology and the resulting hiring boom. Davies explains how consultants are bridging the gap between...
Jonathan Reiner, Director of Product Solutions at Quantum Machines, explains how his team tackles the dual complexity of sophisticated quantum‑control hardware and a diverse, multi‑modality market. He describes the evolution from the OPX+ controller to a full‑stack offering that includes...
Amera IoT introduced AmeraKey® Encryption, a quantum‑proof solution backed by 14 U.S. patents. The system creates identical encryption keys on both ends of a link using a Picture‑and‑PIN method, eliminating the need to transmit keys or ciphertext. By leveraging transmission‑free...
French startup Quobly and Dutch research institute TNO have launched a joint research program to speed up industrial‑scale production of silicon spin qubits. The collaboration merges Quobly’s CMOS‑compatible qubit designs with TNO’s advanced materials characterization and cryogenic testing facilities. Their...
BTQ Technologies Corp. has been added to VanEck's $524.5 million Quantum Computing UCITS ETF, which tracks the MarketVector Global Quantum Leaders Total Return Net Index. The fund, launched in May 2025, holds 30 quantum‑focused companies and rebalances quarterly, with a 0.55% expense...
An IEEE research team demonstrated a deployment‑ready time‑bin entangled photon source using commercially available components across Vienna’s fiber network. The system achieved approximately 93 % visibility, measured with a Mach‑Zehnder delay‑line interferometer, surpassing thresholds for secure quantum‑key‑distribution. By relying on off‑the‑shelf...
NEXCOM announced at MWC Barcelona 2026 a suite of quantum‑resistant platforms that embed post‑quantum cryptography (PQC) frameworks for long‑term data protection. The rollout targets telecom, enterprise and industrial networks, emphasizing edge security and resilient networking. Alongside the PQC platforms, the...
SEEQC, a developer of digital quantum‑classical chips, has signed a definitive merger agreement with Allegro Merger Corp., valuing the combined entity at roughly $1 billion. The deal includes a $65 million PIPE financing that will fund scaling of its Single Flux Quantum...
MicroCloud Hologram Inc. unveiled an FPGA‑based hierarchical tensor‑contraction pipeline that accelerates quantum tensor‑network simulations. By mapping tensor operations onto deep‑pipelined MAC arrays, the system delivers a 1.7× speedup over traditional CPUs and more than double the energy efficiency. The architecture...
Stanford chemist Fang Liu unveiled a gold‑tape technique that produces ultraclean twisted 2D moiré superlattices with near‑100% yield and centimeter‑scale dimensions. The method replaces the low‑yield Scotch‑tape approach, enabling uniform samples of graphene, MoS₂ and other semiconductors. Using SSRL’s X‑ray...
Researchers at RIKEN have demonstrated that microwave‑driven transitions of electrons floating above liquid helium can be detected through changes in quantum capacitance. By using ten million surface electrons as a macroscopic capacitor, they measured the Rydberg‑state transition via microwave frequency modulation....
It has been a great pleasure—and both fun and insightful—to speak with Thomas Ramge about the future of quantum technologies, broader aspects of science and technology, and what makes science so exciting in the first place. I especially appreciate the...
⚛️ QUANTUMatter 2026 — Barcelona 🇪🇸 | Apr 27–30, 2026. Quantum materials + quantum info + hardware: one room, four days. Talks, expo, partnerships. Let’s build the future. 🔗 https://t.co/nSZk9pTpyU @QuantumConf #QUANTUMatter2026 #QuantumMaterials https://t.co/x8y1WMZAPr
The study demonstrates that measuring only a subset of qubits in variational quantum circuits raises label‑prediction variance in regression quantum machine‑learning tasks. By introducing a controlled‑swap based partial‑measurement scheme, the authors reduce gate overhead while preserving accuracy. Analytical and numerical...
