QMBLthe quantum many-body leaderboard

All instances / J1-J2

J1-J2 honeycomb 7x7 (98 sites), J2 = 0.2

Best values (rules §6)

best variational -0.4538(4) VMC (LCN)
Fu et al. (2022) · the lowest unflagged variational energy, a strict variational bound

Energies as E/N (S.S). Classes are different claims and are not ranked against each other.

The Hamiltonian

H = ∑⟨ij⟩ σi·σj + J2 ∑⟨⟨ij⟩⟩ σi·σj

J1 = 1, J2 = 0.2, nearest and next-nearest neighbours, written with Pauli matrices.

lattice
honeycomb-7x7
sites
98
boundary
periodic
J2
0.2
energies
4

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

Every published energy

Grouped by what the number is. The exact energy comes first where there is one; in every other group the lowest unflagged energy is its best value, and each row's distance is to that best (rules §6).

Strict variational upper bounds (4)

Energies that a variational state reached (VMC, DMRG and MPS at finite bond dimension, PEPS, NQS, VQE). Each is an upper bound on the ground-state energy.

E/N (S.S)distance to class bestσVar(E)V-score methodsourcecodeyearcomment
-0.4538best variational 0 4.0e-4 n/a n/a VMC (LCN)
peer reviewed
Fu et al. (2022) 2022
-0.4536tied with best variational at 2σ 2.0e-4 5.0e-4 n/a n/a VMC (GNN)
preprint
Kochkov et al. (2021) 2021
-0.4528tied with best variational at 2σ 1.0e-3 2.0e-4 n/a n/a VMC (GNN)
preprint
Kochkov et al. (2021) 2021
-0.4496 4.2e-3 4.0e-4 n/a n/a VMC (ResNet)
preprint
Kochkov et al. (2021) 2021

How these numbers were read

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

-0.4538(4), VMC (LCN)

Checked 2026-10-20 · source text of arXiv:2206.07370 read locally (arXiv HTML or pypdf layout text); value copied from the harvested cell and the text, no LLM transcription of numbers; first reading and an adversarial second reading (2026-10-20)

Reported as. -0.4538(4)

Table 1, Honeycomb N = 98, J2 = 0.2, column LCN; version read: arXiv text (sources/2206.07370.txt); the journal version was not reached from this session, to be read on the verification pass (RULES.md 8) | Same Hamiltonian, lattices and references as arXiv:2110.06390 (Sec. 'Lattice': 'Following Kochkov et al. [27]'); Table 1 'energy per site'.

-0.4536(5), VMC (GNN)

Checked 2026-10-20 · source text of arXiv:2110.06390 read locally (arXiv HTML or pypdf layout text); value copied from the harvested cell and the text, no LLM transcription of numbers; first reading and an adversarial second reading (2026-10-20)

Reported as. -0.4536(5)

Table IV, Honeycomb, J2 = 0.2, N = 98, column GNN-2; version read: arXiv text; no journal version found (arXiv metadata) | Eq. (4) H = sum S_i.S_j + J2 sum S_i.S_j, spin-1/2, J1 = 1; Table IV '<E>/N', 'variational energies per spin'.

-0.4528(2), VMC (GNN)

Checked 2026-10-20 · source text of arXiv:2110.06390 read locally (arXiv HTML or pypdf layout text); value copied from the harvested cell and the text, no LLM transcription of numbers; first reading and an adversarial second reading (2026-10-20)

Reported as. -0.4528(2)

Table IV, Honeycomb, J2 = 0.2, N = 98, column GNN; version read: arXiv text; no journal version found (arXiv metadata) | Eq. (4) H = sum S_i.S_j + J2 sum S_i.S_j, spin-1/2, J1 = 1; Table IV '<E>/N', 'variational energies per spin'.

-0.4496(4), VMC (ResNet)

Checked 2026-10-20 · source text of arXiv:2110.06390 read locally (arXiv HTML or pypdf layout text); value copied from the harvested cell and the text, no LLM transcription of numbers; first reading and an adversarial second reading (2026-10-20)

Reported as. -0.4496(4)

Table IV, Honeycomb, J2 = 0.2, N = 98, column ResNet; version read: arXiv text; no journal version found (arXiv metadata) | Eq. (4) H = sum S_i.S_j + J2 sum S_i.S_j, spin-1/2, J1 = 1; Table IV '<E>/N', 'variational energies per spin'.

Coverage

Newest published number here: 2022.

This instance as data

JSON · source file on GitHub · add a result · open an issue about this instance