Circuit cutting: Remap fragment tape wires to match wires available on device #2257
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Codecov Report
@@ Coverage Diff @@
## master #2257 +/- ##
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Coverage 99.31% 99.31%
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Files 237 237
Lines 18906 18932 +26
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+ Hits 18776 18802 +26
Misses 130 130
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| 0: ──RX(0.5)──╭C──╭┤ ⟨Z ⊗ Z⟩ | ||
| 1: ──RY(0.6)──╰X──╰┤ ⟨Z ⊗ Z⟩ | ||
| """ | ||
| if len(tape.wires) > len(wires): |
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should we raise a similar error for the case when len(tape.wires) < len(wires), considering running on hardware but not sure if having an unnecessarily big device is of much consequence?
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If we do len(tape.wires) < len(wires) then we'd likely often hit an error - e.g., you have a 5-qubit circuit and split into 3 and 2 qubit fragments. We won't be able to run on a 3-qubit device because the 2-qubit fragment will lead to an error.
Context:
This PR ensures that N-qubit fragment circuits can be run on N-qubit devices by mapping the wires of the input circuit to match those available in the device.