Output discrepancy when args of mz are in a list vs when comma separated

[poojarao8]

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Describe the bug

If the qubits to be measured are specified in a list, that is, mz( [ q[], ..,q[] ] ), the correct number of digits in the bitstrings is output upon sampling. But if you don't specify them as a list but simply as comma separated args, no matter how many args there are, only a single digit bitstring is output.

Steps to reproduce the bug

import cudaq

@cudaq.kernel
def my_kernel():
    q = cudaq.qvector(5)
    x(q[2])
    #mz([q[0], q[2]]) #2-digit bitstring
    mz(q[0], q[1], q[2]) # 1-digit bitstring

result = cudaq.sample(my_kernel)
print(result)

Expected behavior

To address this issue, we can go down either of these routes:

1. Raise an error when qubits are provided in a comma-separated format, prompting the user to input qubits in a list format for consistency.
   or
2. Make modification to ensure that the output format for comma-separated qubits is consistent with the list format.

Is this a regression? If it is, put the last known working version (or commit) here.

Not a regression

Environment

• CUDA Quantum version:
• Python version:
• C++ compiler:
• Operating system:

Suggestions

No response