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All instances / Electron gas, 3D

Electron gas, 3D rect-3x3x2 cell, N = 36, rs = 80, unpolarized

Record

-0.00945620(2) E/N (Ha)

MP-NQS (2 message-passing iterations, plane-wave reference, Gaussian basis transformation)

arXiv:2604.15888 · lowest unflagged energy published, a strict variational bound (rules §6)

The Hamiltonian

H = −½ ∑i ∇i2 + ∑i<j vE(ri − rj) + Nξ/2

Homogeneous electron gas in 3D: N↑ = 18, N↓ = 18 in a periodic rect-3x3x2 cell at rs = 80 bohr, Γ point. vE is the Ewald-summed Coulomb interaction with a uniform neutralizing background, ξ the Madelung term. Hartree atomic units; the energy per electron is E/N.

cell
rect-3x3x2
electrons
36
boundary
periodic
N_up
18
N_dn
18
rs
80
twist
Gamma
energies
4

Stored as a total energy in Hartree (rules §12); quoted here as E/N (Ha), the energy per electron (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 (Ha)distance to recordσVar(E)V-score methodsourceyear
-0.00945620record 0 1.7e-8 n/a n/a MP-NQS (2 message-passing iterations, plane-wave reference, Gaussian basis transformation)
preprint
arXiv:2604.15888 n/a
-0.00945607 1.3e-7 1.7e-8 n/a n/a MP-NQS (2 message-passing iterations, plane-wave reference)
preprint
arXiv:2604.15888 n/a
-0.00944919 7.0e-6 2.5e-8 n/a n/a MP-NQS (1 message-passing iterations, plane-wave reference, Gaussian basis transformation)
preprint
arXiv:2604.15888 n/a
-0.009448958 7.2e-6 8.3e-9 n/a n/a MP-NQS (1 message-passing iterations, plane-wave reference)
preprint
arXiv:2604.15888 n/a

How these numbers were read

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

-0.00945620(2) — MP-NQS (2 message-passing iterations, plane-wave reference...

Checked 2026-10-16 · source text of arXiv:2604.15888 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. -0.3404231(6)

Table IV (SM S3.D), rs=80, column E iteration=2; sources/2604.15888.txt line 1343; printed in Ha, total; version read: arXiv text with its Supplemental Material; no journal version (Crossref) | Total energies in Hartree (captions 'Total energies, in Hartree'), divided by N; the SM's Ewald sum includes the self-image terms. QMBL's HF check: N = 14, rs = 1, sc: E/N = 0.56902 is 0.0375 Ha below QMBL's HF energy 0.6065343, as arXiv:2202.04622's are.

-0.00945607(2) — MP-NQS (2 message-passing iterations, plane-wave reference)

Checked 2026-10-16 · source text of arXiv:2604.15888 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. -0.3404184(6)

Table IV (SM S3.D), rs=80, column E' iteration=2; sources/2604.15888.txt line 1343; printed in Ha, total; version read: arXiv text with its Supplemental Material; no journal version (Crossref) | Total energies in Hartree (captions 'Total energies, in Hartree'), divided by N; the SM's Ewald sum includes the self-image terms. QMBL's HF check: N = 14, rs = 1, sc: E/N = 0.56902 is 0.0375 Ha below QMBL's HF energy 0.6065343, as arXiv:2202.04622's are.

-0.00944919(2) — MP-NQS (1 message-passing iterations, plane-wave reference...

Checked 2026-10-16 · source text of arXiv:2604.15888 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. -0.3401708(9)

Table IV (SM S3.D), rs=80, column E iteration=1; sources/2604.15888.txt line 1343; printed in Ha, total; version read: arXiv text with its Supplemental Material; no journal version (Crossref) | Total energies in Hartree (captions 'Total energies, in Hartree'), divided by N; the SM's Ewald sum includes the self-image terms. QMBL's HF check: N = 14, rs = 1, sc: E/N = 0.56902 is 0.0375 Ha below QMBL's HF energy 0.6065343, as arXiv:2202.04622's are.

-0.009448958(8) — MP-NQS (1 message-passing iterations, plane-wave reference)

Checked 2026-10-16 · source text of arXiv:2604.15888 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. -0.3401625(3)

Table IV (SM S3.D), rs=80, column E' iteration=1; sources/2604.15888.txt line 1343; printed in Ha, total; version read: arXiv text with its Supplemental Material; no journal version (Crossref) | Total energies in Hartree (captions 'Total energies, in Hartree'), divided by N; the SM's Ewald sum includes the self-image terms. QMBL's HF check: N = 14, rs = 1, sc: E/N = 0.56902 is 0.0375 Ha below QMBL's HF energy 0.6065343, as arXiv:2202.04622's are.

Coverage

No row here carries a publication year.

This instance as data

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