03 · Neutral atoms

Neutral atoms

Arrange light. Explore interaction.

SCHEMATIC GEOMETRY

CALCULATED · IDEAL MODEL

H/ℏ = Ω(XA + XB)/2 − Δ(nA + nB) + V nA nB; V = c₆/r⁶; Rᵦ = (c₆/Ω)¹⁄⁶

Assumptions and limits

Only the selected isolated pair has a simulated quantum state; displayed spectator sites are excluded from its Hamiltonian.
Fixed positions, two levels per atom, identical constant drive and zero drive phase; no motion, decay, laser noise, loss or readout error.
c₆ = 5,420,503 rad·μm⁶/μs is the 87Rb 70S example in the 2023 Aquila whitepaper, not a current device calibration.
The blockade radius marks V=Ω. Detuning and finite interaction matter; it is not an exclusion boundary or an entanglement certificate.
These are individually focused optical-tweezer arrangements, not interference-generated optical lattices. Atom sizes and light are schematic.
Finite patches have boundary sites with fewer neighbours. Geometry alone does not establish a quantum phase or hardware performance.

Sources · 9 references

Aquila: QuEra’s 256-qubit neutral-atom quantum computerWurtz et al., 20 June 2023; p23 gives the 70S interaction coefficient and pair model.
Programming a neutral-atom QPUPasqal documentation; ground–Rydberg drive, detuning and interaction Hamiltonians. Checked 5 September 2026.
Rydberg BlockadeQuEra Bloqade; distinguishes the characteristic blockade radius from a controlled Hilbert-space truncation. Checked 5 September 2026.
Quantum phases of matter on a 256-atom programmable quantum simulatorEbadi et al., Nature 595 (2021); square, honeycomb and triangular tweezer arrays.
Quantum phases of Rydberg atoms on a kagome latticeSamajdar et al., PNAS 118 (2021); theoretical kagome-site model.
Probing topological spin liquids on a programmable quantum simulatorSemeghini et al., Science (2021); atoms on kagome links, distinct from this kagome-site preset.
Maldacena & Susskind · Cool horizons for entangled black holes (2013)3 June 2013 · The ER = EPR conjecture, cited for the Frontier chapter.
Maldacena · Eternal black holes in AdS (2001)JHEP 0304, 021 (2003) · The thermofield double behind the ER = EPR conjecture.
Kobrin, Schuster & Yao · Comment on "Traversable wormhole dynamics on a quantum processor" (2023)15 February 2023 · Contests the 2022 processor "wormhole" claim; the original paper carries a later author correction.

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