An attempt at massively parallel analog computation in physical material — hand-built
memristive cells, a few shekels of salt and gel, no foundry. The name is a memorial dedication. This is the most
speculative work in the lab and it is fenced accordingly.
The measurement that ended the first attempt
A cell was built and driven through an automated five-cycle set/reset test with sixty resistance reads.
- Reads returning 0 Ω (dead short)60 / 60
- Valid switching cycles0 / 5
- Separation between set and resetnone
Verdict: no memristance whatsoever. The cause was mechanical rather than chemical — a soaked
absorbent substrate cannot hold a sub-millimetre gap, so the electrodes simply touched. Reported as a failure
the same morning, rather than retried quietly until a graph looked better.
The claim we refuse to make
This is not a quantum computer. There are no qubits, no entanglement, no Hilbert-space
superposition, and it cannot break modern cryptography. Any framing that implies otherwise
collapses under the first hard question from anyone who knows the field.
Further: the central speculative idea — carrying several independent computation channels on one device by
frequency multiplexing — has, in our own literature search, no published support.
Not refuted, simply no evidence. It is treated as untested speculation to be settled by a small experiment
before anything is built on top of it.
What is genuinely worth pursuing, without any embellishment: massively parallel analog computation in
material, at very low power, from ordinary materials, owned end to end.
Published hardware fact that killed a design
An early stand-in used small incandescent bulbs as analog weights. It worked as a weight grid
and was then proposed for the frequency-multiplexing test.
It physically cannot carry one. A filament is a thermal low-pass filter with a cutoff of a
few hertz — the very thermal averaging that makes brightness-as-weight work destroys any carrier above it.
The bulb grid also turned out to be miswired: two lamps lit regardless of command, so they were never under
control at all. Both facts are recorded so the design is not proposed again.
The pivot that did produce something
After the negative result, the bench moved to thermal and electronic neurons — and each idea
was simulated before it was recommended.
- A single-neuron perceptron with a motor-driven potentiometer as a physical weight: simulation converged
on AND in six epochs and OR in four, and never on exclusive-or — the 1969 limitation,
reproduced honestly rather than glossed.
- An incandescent bulb was verified to show the pinched hysteresis signature of a memristive
system, volatile on a ~20 ms scale.
- A thermoelectric element was checked and found not to be a clean memristor — its
back-EMF breaks the required pinch at the origin — but it makes a good slow integrate-and-fire neuron,
with a fan as a literal forgetting knob.