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Researchers Use Light to Study Electron Motion in Wigner Crystals

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Stabilizer Statistical Mechanics: A Framework for Efficient Quantification and Classification of Magic States

Aug 18, 2026

Geometric signatures of the onset of many-body ergodicity

Aug 18, 2026

Enabling Hybrid HPCQC Workflows with a Heterogeneous Software Stack

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A gauge-invariant theory of small Markovian errors in quantum gate sets

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Floquet-Liouville Theory for Strongly Driven Open Quantum Systemsquantum-computing

Floquet-Liouville Theory for Strongly Driven Open Quantum Systems

--> Quantum Physics arXiv:2608.14966 (quant-ph) [Submitted on 15 Aug 2026] Title:Floquet-Liouville Theory for Strongly Driven Open Quantum Systems Authors:Kamran Akbari, Stephen Hughes View a PDF of the paper titled Floquet-Liouville Theory for Strongly Driven Open Quantum Systems, by Kamran Akbari and Stephen Hughes View PDF HTML (experimental) Abstract:Periodically driven quantum systems are commonly modeled using master equations constructed in the eigenbasis of an undriven Hamiltonian, implicitly assuming that environmental dissipation couples to static energy transitions even under strong time-periodic driving. The validity of this approximation beyond weak or near-resonant driving remains poorly understood. To address the need for a more self-consistent quantum theory approach, we formulate a nonsecular Floquet--Markov generalized master equation (F-GME) in the quasienergy basis, treating interaction-induced (internal) and drive-induced (external) nonperturbative dressing on an equal footing. We subsequently investigate dissipation in two minimal driven open quantum systems---a harmonically driven two-level system and a harmonically driven coupled-two-level-system---each weakly coupled to a Markovian bath. Comparing the F-GME to a time-independent dressed-basis master equation, we show that even for a flat-bath spectral density and weak dissipation, the two approaches can yield qualitatively different steady-state populations and emission spectra. We resolve dissipation into drive-assisted sideband processes decaying via Floquet extended-space quasienergy channels, and show these channels can hybridize through nonsecular couplings into collective Floquet--Liouville modes governing observable spectral resonances. This analysis demonstrates that time-independent dissipative descriptions can incorrectly weight multiphoton Floquet transitions by collapsing quasienergy-resolved decay pathways into static energy gaps. The F-GME framework provides a systematic diagno

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Qudit-ADAPT-VQE: an adaptive variational algorithm with counterdiabatic-inspired improvements for quditsquantum-computing

Qudit-ADAPT-VQE: an adaptive variational algorithm with counterdiabatic-inspired improvements for qudits

--> Quantum Physics arXiv:2608.14981 (quant-ph) [Submitted on 15 Aug 2026] Title:Qudit-ADAPT-VQE: an adaptive variational algorithm with counterdiabatic-inspired improvements for qudits Authors:Joaquín Molina, Herbert Díaz-Moraga, Dardo Goyeneche, Diego Tancara View a PDF of the paper titled Qudit-ADAPT-VQE: an adaptive variational algorithm with counterdiabatic-inspired improvements for qudits, by Joaqu\'in Molina and 2 other authors View PDF HTML (experimental) Abstract:Variational quantum algorithms based on qudits have attracted significant attention in recent years. However, as in their qubit-based counterparts, challenges such as barren plateaus and the design of efficient ansatz remain major obstacles. In this work, we propose to address these issues through a qudit implementation of the ADAPT-VQE algorithm, which constructs the ansatz iteratively. Specifically, we introduce an operator pool inspired by adiabatic evolution enhanced with counterdiabatic driving for ansatz construction and employ it to solve Max 3-Cut. We show that the warm-start strategy inherent to ADAPT-VQE, together with an ansatz construction based on counterdiabatic operators, achieves higher accuracy and lower native gates implementation than approaches on fixed ansatz. Furthermore, we show that, in qudit-based quantum computing, ADAPT-VQE with a counterdiabatic operator pool can navigate rough optimization landscapes with local traps through the burrowing mechanism, suggesting robustness against barren plateau effects and providing a scalable framework for variational quantum algorithms with qudits. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2608.14981 [quant-ph]   (or arXiv:2608.14981v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2608.14981 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Diego Tancara [view email] [v1] Sat, 15 Aug 2026 02:19:32 UTC (3,065 KB) Full-text links: Access Paper:

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Top 10 Quantum Computing Companies in Francetechnology

Top 10 Quantum Computing Companies in France

France’s quantum ecosystem spans neutral atoms, cat qubits, photonics, silicon spin processors, quantum networking and sensing. QuantumNews ranks the ten companies leading this diverse and increasingly commercial technology landscape.

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Sunlight generates entangled photon pairs for the first timeresearch

Sunlight generates entangled photon pairs for the first time

Researchers have achieved this milestone despite sunlight's low coherence and intensity, offering a sustainable alternative to lasers.

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Gujarat to Launch State Quantum Mission, Joining India’s Race to Build Regional Quantum Hubsquantum-computing

Gujarat to Launch State Quantum Mission, Joining India’s Race to Build Regional Quantum Hubs

The Gujarat government plans to establish a dedicated Quantum Mission to accelerate research, skills and practical applications across the state. The initiative will complement India’s ₹6,003.65-crore National Quantum Mission, although Gujarat is yet to announce its budget, governance structure or implementation timeline.

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Top 10 Quantum Computing Companies in Japanquantum-computing

Top 10 Quantum Computing Companies in Japan

Japan is quietly building one of the world's most complete quantum ecosystems — spanning superconducting processors, cold neutral-atom hardware, cryogenic materials, quantum software, and pharma-grade quantum chemistry. According to QuantumNews' Japan country page, the ecosystem now counts 52 companies, 8 university research clusters, and 1 national research institution, concentrated heavily around Tokyo (35 companies), with smaller hubs in Osaka, Wako, Yokohama, Chigasaki, Kyoto, Hamamatsu, and Tsukuba. Here's a deep dive into the Top 10 Japanese quantum computing companies, ranked by their QuantumNews Quantum Score — a composite measure of hardware scale, gate fidelity/error-correction maturity, funding raised & investor quality, and commercial momentum & partnerships.

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India’s 1,000-Km Quantum-Secure Network Marks a Defining Moment for the National Quantum Missiontechnology

India’s 1,000-Km Quantum-Secure Network Marks a Defining Moment for the National Quantum Mission

India’s National Quantum Mission has demonstrated a 1,000-kilometre quantum-secured communication network using indigenous technology developed by QNu Labs. The milestone takes India halfway towards its 2,000-kilometre inter-city QKD target and strengthens the country’s position in quantum communication and cybersecurity.

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Silicon-Spin Quantum Computers Move Closer to Integrated Chipstechnology

Silicon-Spin Quantum Computers Move Closer to Integrated Chips

Researchers have integrated silicon spin qubits, cryogenic CMOS control and superconducting interconnects into a working quantum processing unit. The advance addresses one of the biggest barriers to scaling silicon quantum computers: controlling large numbers of qubits without overwhelming cryogenic systems with wiring.

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Quantinuum and Oracle Partner to Bring Helios Quantum Computer to Oracle Cloud Infrastructure for Hybrid Quantum-AI Workloads

Quantinuum and Oracle Partner to Bring Helios Quantum Computer to Oracle Cloud Infrastructure for Hybrid Quantum-AI Workloads

Aug 12, 2026
HAWK Lattice Signature Scheme Withdrawn from NIST Round 3 After AI-Assisted Key-Recovery Attack​

HAWK Lattice Signature Scheme Withdrawn from NIST Round 3 After AI-Assisted Key-Recovery Attack​

Aug 13, 2026
Virginia Tech hires quantum algorithms expert Jiaqi Leng

Virginia Tech hires quantum algorithms expert Jiaqi Leng

Aug 13, 2026
Quantum Computing Weekly Round-Up: Week Ending August 15, 2026

Quantum Computing Weekly Round-Up: Week Ending August 15, 2026

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Who’s News: Strategic Appointments at PsiQuantum, EigenQ, Qunova Computing, and Optica Quantum

Who’s News: Strategic Appointments at PsiQuantum, EigenQ, Qunova Computing, and Optica Quantum

Aug 15, 2026
Alice & Bob Joins €4.6 Million QuBriC Network for Quantum Error Correction Doctoral Training

Alice & Bob Joins €4.6 Million QuBriC Network for Quantum Error Correction Doctoral Training

Aug 14, 2026
Defense lab to formalize QTREX quantum program in Q4 2026

Defense lab to formalize QTREX quantum program in Q4 2026

Aug 13, 2026
DOE’s Brookhaven Lab to lead $7M quantum physics outpost project

DOE’s Brookhaven Lab to lead $7M quantum physics outpost project

Aug 13, 2026
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India National Quantum Mission

Explore India's ₹6,003 Crore quantum initiative: 4 thematic hubs, leading startups, and the latest developments in India's quantum ecosystem

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