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Year I · No. 138
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Monday, 19 Oct 2026

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· Quantum Physics · 19 · 10 · 2026

20-metre multimode fiber synthesises programmable high-dimensional quantum states

A team has demonstrated programmable synthesis of high-dimensional quantum states transmitted through 20 metres of multimode optical fibre. The work, published in Nature, combines photons generated in atoms with long coherence times and control techniques that allow complex states to be prepared and recovered despite the modal dispersion characteristic of this type of fibre.

§ Today’s briefing

5 dispatches · 19 · 10 · 2026

Autumn Colors Poland's Bieszczady Mountains in NASA Image of the Day

NASA has released an image of the Bieszczady Mountains, in southeastern Poland, showing the forests of Bieszczady National Park tinted by autumn coloration. The tree-covered slopes display warm tones, while the polonina — high-mountain meadows characteristic of this Carpathian region — have already turned tan.

Polonina are high-altitude grassland formations occupying summits and ridges above the tree line, maintained in this area for centuries by grazing and by the mountain climate. Their transition to autumn hues contrasts with the mosaic of colors of the beech and birch forest covering the park's slopes.

“NASA has released an image of the Bieszczady Mountains, in southeastern Poland, showing the forests of Bieszczady National Park tinted by autumn coloration.”
§ Technical sheet
Source
NASA
Category
General
Edition
Nº 138
Date
2026-10-19
Reading
1 min
Origin
Source ↗

§ arXiv briefing

— ex praeprintis hodiernis —
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    Agentic AI compiles quantum circuits more efficiently with classical verification

  2. 2610.23815 · cuantica

    Neural networks describe anyon gases of up to 20 particles

  3. 2610.23810 · cuantica

    A balanced parametric amplifier doubles its useful bandwidth without interference

  4. 2610.23781 · cuantica

    Localized constraints fragment Hilbert space without slowing transport

  5. 2610.23840 · cuantica

    IBM suppresses logical errors in a surface-code memory on the cloud

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