sci-run / tasks /surface-code-decoding /surface-code-decoding-astra-xhigh-1h100-48h-20261020b /finalization /submission /conditional_edge_model.py
| """A new endpoint-feature projection into an otherwise frozen edge network.""" | |
| import jax | |
| import jax.numpy as jnp | |
| def probabilities(projection,frozen,dets,base_logits,embedding,context,static,valid,grid,measurement_indices,counts): | |
| assert projection.shape==(64,64) and frozen['w1'].shape==(394,64) | |
| event_grid=dets[:,grid];measured=(jnp.cumsum(event_grid.astype(jnp.int32),axis=1)&1).reshape(len(dets),624);measured=jnp.pad(measured,((0,0),(0,1))) | |
| events=dets[:,context].astype(jnp.float32);measurements=measured[:,measurement_indices[context]].astype(jnp.float32);density=jnp.sum(event_grid,axis=1)/counts[None,:] | |
| x=jnp.concatenate([events,measurements,jnp.broadcast_to(density[:,None,:],(len(dets),len(context),24)),jnp.broadcast_to(static[None,:,:],(len(dets),*static.shape)),base_logits[:,:,None]/8],axis=-1) | |
| hidden=jax.nn.silu(x@frozen['w1']+frozen['b1']+embedding@projection);hidden=jax.nn.silu(hidden@frozen['w2']+frozen['b2']);delta=2*jnp.tanh((hidden@frozen['w3']+frozen['b3'])[...,0]) | |
| return (jax.nn.sigmoid(base_logits+delta)*valid[None,:]).T | |