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All instances / Transverse-field Ising

Transverse-field Ising square 12x12, open, h = 4

Record

-4.1217979 E/N (Pauli)

DMRG

Dao (2026) · lowest unflagged energy published, a strict variational bound (rules §6)

The Hamiltonian

H = −∑⟨ij⟩ σziσzj − h ∑i σxi

Transverse field h = 4. Already in Pauli operators, with no S·S term to rescale, so the per-site energy is E/N.

lattice
square
sites
144
boundary
open
h
4
energies
4

Stored as a total energy; quoted here as E/N (Pauli), which is what the papers report (how the conversion works).

Every published energy

Grouped by what the number is. Where the instance is not solved, the lowest unflagged energy of any group is the record.

Strict variational upper bounds (4)

Where the instance is not solved, the record is the lowest unflagged energy in this group or among the projected and extrapolated ones, with or without an error bar; where it is solved, the exact energy is the record and the lowest of these is the closest challenger.

E/N (Pauli)distance to recordσVar(E)V-score methodsourceyear
-4.1217979record 0 n/a n/a n/a DMRG
preprint
Dao (2026) 2026
-4.12153 2.7e-4 5.0e-5 n/a n/a 2D RNN (Euclidean cells)
preprint
Dao (2026) 2026
-4.12150 3.0e-4 5.3e-5 n/a n/a 2D RNN (Lorentz (hyperbolic) cells, L_max = 2.0)
preprint
Dao (2026) 2026
-4.12133 4.7e-4 4.7e-5 n/a n/a 2D RNN (Lorentz (hyperbolic) cells, L_max = 1.5)
preprint
Dao (2026) 2026

How these numbers were read

Where each number below was read, and how it was checked.

-4.1217979 — DMRG

Checked 2026-10-16 · source text of arXiv:2606.25600 read locally (arXiv HTML or pypdf layout text); value copied from the harvested cell and the text, no LLM transcription of numbers; single reading

Reported as. -593.5389

Table 6, row DMRG (not exact); sources/2606.25600.txt line 808; version read: arXiv v1 text (sources/2606.25600.txt); every energy string checked identical in v2 (2026-10-10); no journal version (Crossref, arXiv abs page); the paper's own DMRG, labelled 'DMRG (not exact)'; no bond dimension, code or reference given | Eq. (17): H = -J sum_<ij> sigma^z sigma^z - B_x sum_i sigma^x, Pauli matrices, J = 1, open boundaries in both directions; energies are totals (they scale with N: DMRG -202.5077/64, -316.9770/100, -457.0416/144 = -3.164, -3.170, -3.174 per site); QMBL's h is B_x.

-4.12153(5) — 2D RNN (Euclidean cells)

Checked 2026-10-16 · source text of arXiv:2606.25600 read locally (arXiv HTML or pypdf layout text); value copied from the harvested cell and the text, no LLM transcription of numbers; single reading

Reported as. −593.5006 (0.0072)

Table 6, row Euclidean 2DRNN , column Best, upper line (error in lower line); sources/2606.25600.txt line 799; version read: arXiv v1 text (sources/2606.25600.txt); every energy string checked identical in v2 (2026-10-10); no journal version (Crossref, arXiv abs page); best over runs with distinct initialisations; the line below the energy prints its standard error, 0.0072 | Eq. (17): H = -J sum_<ij> sigma^z sigma^z - B_x sum_i sigma^x, Pauli matrices, J = 1, open boundaries in both directions; energies are totals (they scale with N: DMRG -202.5077/64, -316.9770/100, -457.0416/144 = -3.164, -3.170, -3.174 per site); QMBL's h is B_x.

-4.12150(5) — 2D RNN (Lorentz (hyperbolic) cells, L_max = 2.0)

Checked 2026-10-16 · source text of arXiv:2606.25600 read locally (arXiv HTML or pypdf layout text); value copied from the harvested cell and the text, no LLM transcription of numbers; single reading

Reported as. −593.4953 (0.0077)

Table 6, row Lorentz 2DRNN Lmax=2.0, column Best, upper line (error in lower line); sources/2606.25600.txt line 802; version read: arXiv v1 text (sources/2606.25600.txt); every energy string checked identical in v2 (2026-10-10); no journal version (Crossref, arXiv abs page); best over runs with distinct initialisations; the line below the energy prints its standard error, 0.0077 | Eq. (17): H = -J sum_<ij> sigma^z sigma^z - B_x sum_i sigma^x, Pauli matrices, J = 1, open boundaries in both directions; energies are totals (they scale with N: DMRG -202.5077/64, -316.9770/100, -457.0416/144 = -3.164, -3.170, -3.174 per site); QMBL's h is B_x.

-4.12133(5) — 2D RNN (Lorentz (hyperbolic) cells, L_max = 1.5)

Checked 2026-10-16 · source text of arXiv:2606.25600 read locally (arXiv HTML or pypdf layout text); value copied from the harvested cell and the text, no LLM transcription of numbers; single reading

Reported as. −593.4719 (0.0068)

Table 6, row Lorentz 2DRNN Lmax=1.5, column Best, upper line (error in lower line); sources/2606.25600.txt line 805; version read: arXiv v1 text (sources/2606.25600.txt); every energy string checked identical in v2 (2026-10-10); no journal version (Crossref, arXiv abs page); best over runs with distinct initialisations; the line below the energy prints its standard error, 0.0068 | Eq. (17): H = -J sum_<ij> sigma^z sigma^z - B_x sum_i sigma^x, Pauli matrices, J = 1, open boundaries in both directions; energies are totals (they scale with N: DMRG -202.5077/64, -316.9770/100, -457.0416/144 = -3.164, -3.170, -3.174 per site); QMBL's h is B_x.

Coverage

Newest published number here: 2026.

This instance as data

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