Fix incorrect/missing Google Colab Links

[j3soon]

No description provided.

[j3soon]

2025/01/09 Update: Thanks to @Squirtle007, I'm able to confirm the following is a upstream (CUDA-Q) issue, and not due to this cuda-q-academic repo. Just opened a upstream issue: NVIDIA/cuda-quantum#2500

The following content is kept for potential reference:

In addition, I observed an issue on Colab that will require restarting the session every time when a error occurs in a CUDA-Q kernel. This makes REPL trial-and-error editing difficult on Colab.

Minimal reproducible steps:

• Open the quick start notebook 1: https://colab.research.google.com/github/NVIDIA/cuda-q-academic/blob/main/quick-start-to-quantum/01_quick_start_to_quantum.ipynb
• Correctly install cudaq by uncommenting the pip install command
• Run all the way until 1.2.3 Using CUDA-Q to define and visualize a quantum state
• Observe the two immediate cells below
  1. Defining the minus state in CUDA-Q and
  2. Visualizing a state in CUDA-Q
• Modify the kernel in the first cell to cause error when executed, such as:

  # Define a cudaq.kernel to represent the minus state
  @cudaq.kernel
  def minus_state():
      q = cudaq.qvector(c)
      hi # will cause error
  

• Run the second cell and observe the uninterruptible cell that can only be stopped by restarting the session

---

Full error message:

ERROR:root:Internal Python error in the inspect module.
Below is the traceback from this internal error.

ERROR:root:Internal Python error in the inspect module.
Below is the traceback from this internal error.

ERROR:root:Internal Python error in the inspect module.
Below is the traceback from this internal error.

cudaq.kernel.ast_bridge.CompilerError: <ipython-input-10-e9b73a23e14d>:13: error: Invalid variable name requested - 'hi' is not defined within the quantum kernel it is used in.
	 (offending source -> hi)

During handling of the above exception, another exception occurred:

AttributeError: 'CompilerError' object has no attribute '_render_traceback_'

During handling of the above exception, another exception occurred:

AssertionError
cudaq.kernel.ast_bridge.CompilerError: <ipython-input-10-e9b73a23e14d>:13: error: Invalid variable name requested - 'hi' is not defined within the quantum kernel it is used in.
	 (offending source -> hi)

During handling of the above exception, another exception occurred:

AttributeError: 'CompilerError' object has no attribute '_render_traceback_'

During handling of the above exception, another exception occurred:

TypeError: object of type 'NoneType' has no len()

During handling of the above exception, another exception occurred:

AttributeError: 'TypeError' object has no attribute '_render_traceback_'

During handling of the above exception, another exception occurred:

AssertionError
cudaq.kernel.ast_bridge.CompilerError: <ipython-input-10-e9b73a23e14d>:13: error: Invalid variable name requested - 'hi' is not defined within the quantum kernel it is used in.
	 (offending source -> hi)

During handling of the above exception, another exception occurred:

AttributeError: 'CompilerError' object has no attribute '_render_traceback_'

During handling of the above exception, another exception occurred:

TypeError: object of type 'NoneType' has no len()

During handling of the above exception, another exception occurred:

AttributeError: 'TypeError' object has no attribute '_render_traceback_'

During handling of the above exception, another exception occurred:

TypeError: object of type 'NoneType' has no len()

During handling of the above exception, another exception occurred:

AttributeError: 'TypeError' object has no attribute '_render_traceback_'

During handling of the above exception, another exception occurred:

AssertionError

This issue doesn't seem to occur when running a python script locally, or using a self-hosted jupyter lab.