"Hynix launches 321-layer NAND" (2024) https://news.ycombinator.com/item?id=42229825

See: "Rowhammer for Qubits" re: whether electron tunneling in current and future generation RAM is sufficient to simulate quantum operators; whether RAM [error correction] is a quantum computer even without the EM off the RAM bus.

"Layer codes" (2024) https://www.nature.com/articles/s41467-024-53881-3 :

> Abstract: Quantum computers require memories that are capable of storing quantum information reliably for long periods of time. The surface code is a two-dimensional quantum memory with code parameters that scale optimally with the number of physical qubits, under the constraint of two-dimensional locality. In three spatial dimensions an analogous simple yet optimal code was not previously known. Here we present a family of three dimensional topological codes with optimal scaling code parameters and a polynomial energy barrier. Our codes are based on a construction that takes in a stabilizer code and outputs a three-dimensional topological code with related code parameters. The output codes are topological defect networks formed by layers of surface code joined along one-dimensional junctions, with a maximum stabilizer check weight of six. When the input is a family of good quantum low-density parity-check codes the output codes have optimal scaling. Our results uncover strongly-correlated states of quantum matter that are capable of storing quantum information with the strongest possible protection from errors that is achievable in three dimensions.