Ion Trap example #3026

Gopal-Dahale · 2025-06-10T10:38:10Z

Purpose

Add an example on ion trap quantum dynamics and GHZ state preparation using CUDA-Q, based on the Sørensen-Mølmer paper.

Details

Implements time evolution of the effective Hamiltonian H = $4\chi J_x^2$. It implements GHZ state preparation from |gg...g⟩ → (|gg...g⟩ + |ee...e⟩)/√2, and probability measurements are performed using projector operators. Below plots reproduce Fig. 1 from the paper.

This PR closes #2941

Mentions

@1tnguyen

copy-pr-bot · 2025-06-10T10:38:14Z

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1tnguyen · 2025-06-10T21:29:21Z

/ok to test 384a6a5

Command Bot: Processing...

docs/sphinx/examples/python/dynamics/ion_trap.py

1tnguyen · 2025-06-10T22:00:26Z

@Gopal-Dahale Thank you for the contribution. This tutorial looks great.
I've added a couple of comments to improve the readability.

1tnguyen · 2025-06-11T00:04:46Z

@Gopal-Dahale We need to fix a couple of things for the CI pipeline:

(1) Address the DCO check: https://github.com/NVIDIA/cuda-quantum/pull/3026/checks?check_run_id=43828576852
Please add a DCO Remediation Commit as described there and sign off (-s) future commits.

(2) Code format: https://github.com/NVIDIA/cuda-quantum/actions/runs/15565538371/job/43850332610?pr=3026

You can fix this by running the yapf formatter on the file and committing the changes.
python3 -m yapf --style google -i ion_trap.py

(3) Spelling check: https://github.com/NVIDIA/cuda-quantum/actions/runs/15565538371?pr=3026#summary-43850332620

We do check all the words in code comments. Hence, if a word is not English, we can escape it with backticks, e.g.,`gg`

I, Gopal Dahale <[email protected]>, hereby add my Signed-off-by to this commit: 45fb968 I, Gopal Dahale <[email protected]>, hereby add my Signed-off-by to this commit: 384a6a5 I, Gopal Dahale <[email protected]>, hereby add my Signed-off-by to this commit: 1c3e38d Signed-off-by: Gopal Dahale <[email protected]>

Signed-off-by: Gopal Dahale <[email protected]>

sacpis · 2025-06-11T20:05:44Z

/ok to test db6a804

Command Bot: Processing...

sacpis · 2025-06-11T20:09:43Z

@Gopal-Dahale Would you please run the following command to fix the spellcheck task in CI?

bash scripts/run_all_spelling.sh

Please enclose the words appearing in comments in `` to fix it.

…ntum into issue#2941

I, Gopal Dahale <[email protected]>, hereby add my Signed-off-by to this commit: 1f6c4b1 Signed-off-by: Gopal Dahale <[email protected]> Signed-off-by: Gopal Dahale <[email protected]>

1tnguyen · 2025-06-11T22:19:41Z

/ok to test 05e52cd

Command Bot: Processing...

1tnguyen

LGTM 👍

github-actions · 2025-06-12T02:39:11Z

CUDA Quantum Docs Bot: A preview of the documentation can be found here.

1tnguyen · 2025-06-13T02:20:35Z

/ok to test 0ed0e33

Command Bot: Processing...

1tnguyen · 2025-06-13T02:53:34Z

/ok to test 0872b09

Command Bot: Processing...

sacpis · 2025-06-13T04:19:59Z

/ok to test 65cd371

Command Bot: Processing...

github-actions · 2025-06-13T04:24:28Z

CUDA Quantum Docs Bot: A preview of the documentation can be found here.

github-actions · 2025-06-13T05:59:50Z

CUDA Quantum Docs Bot: A preview of the documentation can be found here.

Gopal-Dahale · 2025-06-16T16:06:15Z

@1tnguyen @sacpis I missed updating the rst file. Have a look at #3063 .

* Ion Trap example * fix comments * Addressed comments * DCO Remediation Commit for Gopal Dahale <[email protected]> I, Gopal Dahale <[email protected]>, hereby add my Signed-off-by to this commit: 45fb968 I, Gopal Dahale <[email protected]>, hereby add my Signed-off-by to this commit: 384a6a5 I, Gopal Dahale <[email protected]>, hereby add my Signed-off-by to this commit: 1c3e38d Signed-off-by: Gopal Dahale <[email protected]> * Formatted Signed-off-by: Gopal Dahale <[email protected]> * Fix spellings * DCO Remediation Commit for Gopal Dahale <[email protected]> I, Gopal Dahale <[email protected]>, hereby add my Signed-off-by to this commit: 1f6c4b1 Signed-off-by: Gopal Dahale <[email protected]> Signed-off-by: Gopal Dahale <[email protected]> --------- Signed-off-by: Gopal Dahale <[email protected]> Co-authored-by: Sachin Pisal <[email protected]> Co-authored-by: Thien Nguyen <[email protected]> Signed-off-by: Anna Gringauze <[email protected]>

Ion Trap example

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Gopal-Dahale mentioned this pull request Jun 10, 2025

CUDA-Q dynamics examples/tutorials for quantum hardware device modelling #2941

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1tnguyen added documentation Improvements or additions to documentation UnitaryHack Good issue for UnitaryHack labels Jun 10, 2025

Gopal-Dahale and others added 7 commits June 11, 2025 11:11

Addressed comments

1c3e38d

Formatted

99aacb1

Signed-off-by: Gopal Dahale <[email protected]>

Merge branch 'main' into issue#2941

206ed6c

Merge branch 'main' into issue#2941

7a0702d

Merge branch 'main' into issue#2941

75a3d5d

Merge branch 'main' into issue#2941

db6a804

Gopal-Dahale added 3 commits June 11, 2025 22:22

Fix spellings

1f6c4b1

Merge branch 'issue#2941' of https://github.com/Gopal-Dahale/cuda-qua…

128f895

…ntum into issue#2941

DCO Remediation Commit for Gopal Dahale <[email protected]>

05e52cd

I, Gopal Dahale <[email protected]>, hereby add my Signed-off-by to this commit: 1f6c4b1 Signed-off-by: Gopal Dahale <[email protected]> Signed-off-by: Gopal Dahale <[email protected]>

1tnguyen approved these changes Jun 12, 2025

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github-actions bot pushed a commit that referenced this pull request Jun 12, 2025

Docs preview for PR #3026.

19b21e9

Merge branch 'main' into issue#2941

0ed0e33

1tnguyen enabled auto-merge (squash) June 13, 2025 02:21

Merge branch 'main' into issue#2941

0872b09

Merge branch 'main' into issue#2941

65cd371

github-actions bot pushed a commit that referenced this pull request Jun 13, 2025

Docs preview for PR #3026.

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1tnguyen merged commit fe61ccc into NVIDIA:main Jun 13, 2025
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github-actions bot pushed a commit that referenced this pull request Jun 13, 2025

Cleaning up docs preview for PR #3026.

467bee8

Gopal-Dahale mentioned this pull request Jun 16, 2025

Add ion trap to using directory #3063

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Ion Trap example #3026

Ion Trap example #3026

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