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Electron gas, 3D sc cell, N = 66, rs = 2, unpolarized

Record

-0.00208(4) E/N (Ha)

Fixed-node DMC (Slater-Jastrow (SJ) trial function, Jastrow factor not stated for this table (J1 Eq. 36 or J2 Eq. 39; conclusions, line 1543, say the pseudo)

10.1140/epjb/e2013-40204-3 · lowest unflagged energy published, a projected estimate (rules §6)

The Hamiltonian

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

Homogeneous electron gas in 3D: N↑ = 33, N↓ = 33 in a periodic sc cell at rs = 2 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
sc
electrons
66
boundary
periodic
N_up
33
N_dn
33
rs
2
twist
Gamma
energies
2

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.

Projected or fixed-node estimates (2)

Variational only within a constraint: fixed-node, constrained-path, GFMC on a trial state. Node- or constraint-dependent, so not cleanly comparable to each other or to strict bounds. Like any unflagged energy, one holds the record where it is the lowest on an unsolved instance.

E/N (Ha)distance to recordσVar(E)V-score methodsourceyear
-0.00208record 0 4.0e-5 n/a n/a Fixed-node DMC (Slater-Jastrow (SJ) trial function, Jastrow factor not stated for this table (J1 Eq. 36 or J2 Eq. 39; conclusions, line 1543, say the pseudo)
peer reviewed
10.1140/epjb/e2013-40204-3 2013
-0.002018 6.2e-5 3.0e-6 n/a n/a Fixed-node DMC (SJ trial function; time step tau = 0.05 (not ed); 4 walker numbers; 'optimal nw' 56)
peer reviewed
10.1140/epjb/e2013-40204-3 2013

How these numbers were read

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

-0.00208(4) — Fixed-node DMC (Slater-Jastrow (SJ) trial function, Jastrow...

Checked 2026-10-19 · source text of arXiv:1304.7298 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. -0.00416(8)

Table II, row rs = 2, column a; sources/1304.7298.txt line 983; printed in Ry per electron; version read: arXiv text in sources/; journal copy not read | Eq. (11) line 277: 'V = sum_{i<j} e^2 v_I(r_ij) + sum_i e^2 v_M', v_M = 1/2 lim_{r->0}[v_I(r) - v(r)] 'a Madelung constant ... interaction of a particle with its own images'; Ewald sums in Sec. III after Natoli and Ceperley (ref 34), background included (Eq. 8, 'uniform background of the same density but opposite charge'). Energies 'given in Rydbergs' (line 196-197). No Hartree-Fock energy is printed anywhere, so the convention cannot be fixed from the paper; the reader's check (see row notes) gives implied E-E_HF of -0.033 Ry (rs 10), -0.049 Ry (rs 5), -0.072 Ry (rs 2), -0.089 Ry (rs 1) per e

-0.002018(3) — Fixed-node DMC (SJ trial function; time step tau = 0.05...

Checked 2026-10-19 · source text of arXiv:1304.7298 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. -0.004036(6)

Table III, row rs = 2, column a; sources/1304.7298.txt line 1000; printed in Ry per electron; version read: arXiv text in sources/; journal copy not read | Eq. (11) line 277: 'V = sum_{i<j} e^2 v_I(r_ij) + sum_i e^2 v_M', v_M = 1/2 lim_{r->0}[v_I(r) - v(r)] 'a Madelung constant ... interaction of a particle with its own images'; Ewald sums in Sec. III after Natoli and Ceperley (ref 34), background included (Eq. 8, 'uniform background of the same density but opposite charge'). Energies 'given in Rydbergs' (line 196-197). No Hartree-Fock energy is printed anywhere, so the convention cannot be fixed from the paper; the reader's check (see row notes) gives implied E-E_HF of -0.033 Ry (rs 10), -0.049 Ry (rs 5), -0.072 Ry (rs 2), -0.089 Ry (rs 1) per e

Coverage

Newest published number here: 2013.

This instance as data

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