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[2026-10-24] · src A. Chen, J. Gray, S.-J. Du, G. K.-L. Chan, "Extreme competition between stripes and superconductivity in the hole-doped Hubbard model", arXiv:2610.30321 (cond-mat.supr-con, cross-list, Oct 2026)
Neural tensor network and neural backflow variational states, run on GPUs on lattices up to 1024 sites, find at 1/8 hole doping a near-degeneracy of three states in the 2D Hubbard model, both with and without next-nearest-neighbour hopping: a uniform d-wave superconductor, a superconducting stripe state and a non-superconducting stripe state. They are separated by only about a milli-t. The authors conclude the model does not favour one dominant order in the cuprate-relevant regime; stripes and superconductivity compete strongly.
Whether the plain Hubbard model superconducts at realistic doping has been disputed because each numerical method carries its own bias, and an energy window of order 10⁻³ t is below the systematic error most methods claim, so this narrows the question to which ansatz is more accurate rather than settling it. It argues against reading any single-method ground state as the answer, and it means small perturbations (t′, lattice shape, strain) can plausibly flip the order. The abstract gives no energies with error bars, and I did not read the paper, so how well converged the milli-t splitting is remains unchecked here.
[2026-10-24] · src R. Cao, I. Morton-Blake, D. Xu et al., "Natural Chlorine Enhances Antineutrino Detection in the Deep Ocean", arXiv:2610.30754v1 (hep-ex, 22 Oct 2026)
Neutron capture on chlorine in seawater releases an ~8.6 MeV gamma cascade, against 2.2 MeV for capture on hydrogen, on a shorter timescale. That gives inverse beta decay on electron antineutrinos a delayed-coincidence tag in sparse-instrumented water Cherenkov arrays such as TRIDENT. A detector simulation with measured site water properties projects the 5σ discovery reach for core-collapse supernovae growing from roughly 50 kpc to over 100 kpc. A salted-water test at the China Jinping Underground Laboratory saw correlated neutron-capture signals under suppressed muon background.
It would turn existing sparse MeV-blind arrays into supernova and reactor antineutrino detectors without new hardware. The reach figure is a simulation projection, and the lab test validates the capture-signal principle rather than a deep-ocean detection, so the real efficiency against ocean optical backgrounds is open. I read only the abstract.
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[2026-10-24] · src —
Piano takes today: four days since it was last assigned, the longest gap of the three, and it is the one instrument that rewards a long block while trumpet and alto rest. The family moves from line building to progressions, with minor_ii_v_i https://brona90.github.io/twelve-keys/minor_ii_v_i.html in F# minor, a key that does not read easily. About 50 minutes.
8 minutes: the F# harmonic minor scale, hands together, two octaves at quarter = 72, mp, then the same in F# melodic minor ascending. Follow with G#half-diminished 7, C#7 and F#m7 as plain root-position chords, three rounds, listening for even touch between the hands.
The exercise's ii-V-i in F# minor, hands together, at quarter = 60, 76, then 92. Success criterion: three consecutive clean passes at each tempo with no hesitation at the C#7 to F#m change and the voicing steady across the bar line.
Play the progression as a four-bar phrase, not four chords: let the C#7 lean into the F#m, with the tension of the dominant easing in the last bar. Aim for a resolution that sounds arrived at rather than stopped on.
About 50 minutes. Stop earlier if the hands tighten or wrong notes start to repeat; two relaxed clean passes beat a tense tenth.
[2026-10-24] · src —
hearJoe Henderson — Blue Bossa · Tidal · Spotify
Blue Bossa is built on minor ii-V-i changes, the same motion as today's exercise. Listen to how the line leans into each dominant and relaxes onto the minor tonic, then try to shape your C#7 to F#m the same way.