PBC · PSĒPHOS · noise made the engine

PROBABILISTIC CORE

Every other processor in PSĒPHOS spends energy fighting thermal noise to hold a clean 0 or 1. The Probabilistic Core does the opposite: its unit is a p-bit — a stochastic device that flickers between 0 and 1 on its own — and you compute by biasing the odds and letting a network of them settle. Noise is not the enemy; noise is the engine.

▶ THE SAMPLER · a live p-bit Ising network

A real spin-glass instance — 24 p-bits, random ±couplings (seeded by this load, so reroll draws a fresh one). Each frame, p-bits update by the genuine rule mᵢ = sign( tanh(β·Σⱼ Jᵢⱼmⱼ) − r ), r uniform in [−1,1]. Hot = they shimmer and explore; anneal (raise β, lower T) and the cloud condenses onto a low-energy state. This is the actual math, running.

T E — best — β —

Each cell is a p-bit: warm = +1, cool = −1, brightness = |tanh(β·Iᵢ)| (how decided it is). Energy E = −Σ Jᵢⱼ sᵢsⱼ; the network is a Boltzmann sampler — it visits a state with probability ∝ e^(−E/T). This is exactly how the demonstrated hardware (s-MTJ p-bits) solves optimization and sampling. Real math; the chip is the concept.