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Topic: quantum computing

A gold and copper dilution-refrigerator assembly with many metal cables and a white arrow indicating an optical fiber used for superconducting-qubit control.
F. Lecocq/NIST · NIST identifies F. Lecocq/NIST as the creator and does not mark the image as copyrighted. NIST's reuse policy states that unmarked information on its sites may be distributed or copied and requests an appropriate image credit. Commercial editorial reuse is permitted in the United States. Foreign copyright treatment and non-copyright rights may vary, and no NIST, MIT or OpenAI endorsement is implied.

ANALYSIS Quantum

Codex Found Six MIT Qubit Resonators and Completed Most Fixed-Qubit Targets Without Intervention

A first-party MIT and OpenAI case study reports researcher intervention to improve four of 40 target measurements on four fixed-frequency qubits. Noisy tunable-qubit scans still required expert judgment.

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By Fabianno Intelligence
6 min read

Three rows of measurements compare photon lifetime, multiphoton probability and two-photon interference at 80 MHz, 500 MHz and 1 GHz excitation rates.
P. Zahalka et al., Figure 2, arXiv:2609.05387v1 · CC BY 4.0. Original research figure used without editorial alteration except possible display scaling. Commercial reuse is permitted with attribution. No endorsement is implied.

ANALYSIS Quantum

A Half-Gigahertz Photon Source Is Bright. Its Quantum Quality Is the Harder Test

A Sparrow Quantum and Ruhr University Bochum preprint reports 515 million in-fiber single photons per second. The same measurements show why source rate alone does not make a scalable photonic quantum computer.

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By Fabianno Intelligence
6 min read

Three stacked bar charts compare local quantum-state-texture measurements for non-entangling operations and two CNOT gate orientations.
Carlos H. S. Vieira, Xinfang Nie, Dawei Lu and Fernando Parisio · Figure 5 appears within a preprint explicitly licensed CC BY 4.0, and its caption identifies no third-party source or separate rights exception. The license permits reproduction, sharing and adaptation, including commercial editorial use, subject to attribution, a license notice, a link to the material and disclosure of modifications. The exact PNG is proposed without editorial alteration except proportional display resizing. Any later crop or substantive edit must be disclosed. No ShareAlike condition applies. Patent, trademark, privacy and moral rights are not affirmatively licensed. No endorsement is implied. This notice records the existing license and does not relicense the figure.

ANALYSIS Quantum

Four Nuclear Spins Show a Local Shortcut for Finding Entangling Gates

Local measurements identified controlled entangling operations in a four-spin NMR test, but scaling beyond the experiment remains unproved.

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By Fabianno Intelligence
6 min read

Technical illustration of two transmon qubits connected through a proposed double-resonator coupler, with circuit, layout, energy-spectrum and interaction diagrams.
Seunghyeon Jin, Seungha Woo, Shinyoung Hwang, June-Young M. Lee, Jeongmin Shim, Sunje Kim, Dae Seok Han, Jaeho Shin and Eunjong Kim · Figure 1 appears within a preprint explicitly licensed CC BY 4.0, and its caption identifies no third-party source or separate rights exception. The license permits reproduction, sharing and adaptation, including commercial editorial use, subject to attribution, a license notice, a link to the material and disclosure of modifications. The exact PNG is proposed without editorial alteration except proportional display resizing. Any later crop or substantive edit must be disclosed. No ShareAlike condition applies. Patent, trademark, privacy and moral rights are not affirmatively licensed. No endorsement is implied. This notice records the existing license and does not relicense the figure.

ANALYSIS Quantum

A Two-Path Coupler Could Quiet Superconducting Qubits Between Gates

A proposed single-junction circuit uses interference between two resonator modes to suppress idle crosstalk and activate fast entangling gates. Every reported performance result comes from modeling, not fabricated hardware.

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By Fabianno Intelligence
6 min read

The Boulder Cryogenic Quantum Testbed at NIST
H. Wang/NIST · NIST public information. Reuse permitted with credit; no endorsement implied.

ANALYSIS Quantum Infrastructure

George Mason’s $7.7 Million Quantum System Makes Openness a Hardware Question

Virginia’s first open-architecture quantum installation aims to let researchers work across processors, controls, software, and networking. The strongest benefit may arrive before quantum advantage: engineers will gain a place to learn how the complete stack fits together.

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By Fabianno Intelligence
8 min read

NIST illustration showing physical atoms grouped into logical qubits for fault-tolerant computation
S. Kelley/NIST · NIST public information. Reuse permitted with credit; no endorsement implied.

NEWS Quantum Science

MIT’s Arm Qubit Separates Memory From Motion to Push Quantum Computing Forward

A new superconducting design gives one component the job of preserving quantum information and another the job of interacting with the circuit. Simulations point to fast, accurate operations, but fabrication will decide whether the architecture can deliver those gains in hardware.

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By Fabianno Intelligence
8 min read