tensorflow / tensorflow/quantum

Handle 3-qubit gates

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#636 2 comments 0 reactions 0 assignees View on GitHub

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area/core help wanted kind/feature-request skill-level/intermediate
Dominant language
Python
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Description

During the writing of #621 it became apparent that the new version of cirq 0.13.0 had changed the way gates are decomposed. Past quantumlib/Cirq#4167 some gates were decomposed into 3 qubit gates, which are not currently supported. Thus, #621 bypassed Cirq's default decomposition as a work around.

However, the work-around shouldn't say forever. Instead, we should:

  • Handle 3-qubit gates
  • Revert the work-around

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing issue #621 and the Cirq 0.13.0 decomposition behavior described here. Trace where the current workaround bypasses Cirq's default decomposition, then determine how 3-qubit gates are represented and supported. Done means 3-qubit gates are handled and the workaround from #621 is reverted.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
quantum-computing
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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