Edge-disjoint paths in the wave pipeline #121
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…routing using edge-disjoint paths.
…f edge-disjoint paths.
… prep, Bell measure, merge, and split.
… and added tests.
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alexandrupaler
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gwwatkin
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| @@ -52,21 +55,25 @@ Options: | |||
| -f, --output-format Requires -o, STDOUT output format: progress, noprogress, machine, stats | |||
| -t, --timeout Set a timeout in seconds after which stop producing slices | |||
| -r, --router Set a router: graph_search (default), graph_search_cached | |||
| -P, --pipeline pipeline mode: stream (default), dag, wave | |||
| -g, --graph-search Set a graph search provider: djikstra (default), astar, boost (not always available) [ignored by -P wave pipeline, which uses astar] | |||
| -P, --pipeline pipeline mode: stream (default), wave, edpc, dag (deprecated) | |||
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Just curious, why is dag deprecated now? do edpc and wave fully replace it?
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I do not know the dag pipeline as well as I do the wave pipeline, but it was my impression that the wave pipeline was an improvement on the dag pipeline in that it constructed the dag in linear time rather than quadratic while effecting the same (or very similar) compilation. What are your thoughts?
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Implemented greedy edge-disjoint path compilation (see Beverland et. al., 2022) within the wave pipeline (use -P edpc) for Bell-based CNOT gates. Can be used for 1-lane (-L edpc --numlanes 1) and 1-lane-condensed (-L edpc --numlanes 1 --condensed 1) layouts.
See scaling improvements for random circuits below (compare with Fig. 5 from Section 3 of Realistic Costs...):
slices-vs-num-qubits.pdf
compilation-time-vs-num-qubits.pdf