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Update qsim from 0.13.3 to 0.21.0#982

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mhucka merged 2 commits intotensorflow:masterfrom
saksham-1304:update-qsim-0.21.0
Feb 6, 2026
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Update qsim from 0.13.3 to 0.21.0#982
mhucka merged 2 commits intotensorflow:masterfrom
saksham-1304:update-qsim-0.21.0

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@saksham-1304 saksham-1304 commented Jan 31, 2026

Description

Updates the qsim dependency from version 0.13.3 to 0.21.0.

Fixes #830

Changes

  • Updated WORKSPACE file to use qsim v0.21.0
  • Updated SHA256 hash for the new version
  • Updated strip_prefix to match the new version

Why

The previous version of qsim (0.13.3) is outdated. Version 0.21.0 includes bug fixes and improvements, including support for matrix gates (see quantumlib/qsim#660).

Testing

  • Build passes: bazel build //tensorflow_quantum/...
  • Tests pass: bazel test //tensorflow_quantum/...

Fixes tensorflow#830

Updated the qsim dependency to the latest version (0.21.0) to get bug fixes and improvements since version 0.13.3.
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@mhucka Sir Please review this PR

@mhucka mhucka self-assigned this Feb 4, 2026
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mhucka commented Feb 5, 2026

@saksham-1304 Thank you for this contribution! I must admit I'm surprised it was this easy to update the version of qsim, but all the better :-).

Could you click the "Update branch" button at your earliest convenience? (If I do it, there's a risk that my name will be added as a coauthor of the PR, and that would be unfair.)

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@mhucka Updated the branch sir

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LGTM

@mhucka mhucka merged commit 6867ca0 into tensorflow:master Feb 6, 2026
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@saksham-1304 saksham-1304 deleted the update-qsim-0.21.0 branch February 6, 2026 03:57
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Update to latest version of qsim

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