ThRust is a Rust crate that provides a framework for thermodynamic and probabilistic computing. This package currently supports the following features:
COPY, NOT, AND, OR.GridPbit's are used to construct a 2D lattice.
let p0 = GridPbit::new(0, 0);
let p1 = GridPbit::new(0, 1);
This construction can be visualized in the following way:
Pbits can then be used as inputs to probabilistic spin logic (PSL) gates:
let cp0 = Copy::new(p0, p1);
A set of PSL gates can be used to construct a p-circuit:
let circuit = Circuit::new();
circuit.append(Box::new(cp0));
circuit.compile();
Alternatively, circuits can be created from a vector of PSL gates:
let circuit = Circuit::from_vector(vec![Box::new(cp0)]);
circuit.compile();
Finally, create a new simulator to find the ground state configurations via Markov chain Monte Carlo
let mut sim = MCMC::new(circuit);
sim.run();
ThRust also implements basic p-circuit composability. For example, here's an example of a two-gate p-circuit:
let p1 = GridPbit::new(0, 0);
let p2 = GridPbit::new(0, 1);
let p3 = GridPbit::new(1, 0);
let p4 = GridPbit::new(2, 0);
let p5 = GridPbit::new(2, 1);
let mut circuit = Circuit::new();
circuit.append(Box::new(And::new(p1, p2, p3)));
circuit.append(Box::new(Or::new(p3, p4, p5)));
circuit.compile();
let mut sim = MCMC::new(circuit);
sim.run();
Running list of features to implement: * Circuit compilation for disjoint circuits * More robust algorithm for circuit compilation * Better plotting implementation with more options * Compute and report observables including confiuration energy * Enforce connectivity constraints * Compile high level code for FPGA hardware implementations
Various references to learn more about probabilistic computing. 1) Thermodynamic AI and the fluctuation frontier 2) p-Bits for Probabilistic Spin Logic 3) Massively Parallel Probabilistic Computing with Sparse Ising Machines
If you use this repository, please cite!
See the LICENSE file.