[BUG] Correction in the Labeling of Plots in Intro to QSVT Tutorial

[elucidator8918]

Issue description

The labels in the plot seem to be switched. The label "target" should correspond to the target_poly function, and the label "qsvt" should correspond to the quantum singular value transformation results. I would like to fix this by curating a PR.

• Expected behavior:

  • The plot should correctly label "target" for the target_poly function and "qsvt" for the quantum singular value transformation results.

• Actual behavior:

  • The labels are switched in the plot. "qsvt" is labeled as "target," and vice versa.

Source code and tracebacks

Present Incorrect Code in the Tutorial:

plt.plot(a_vals, qsvt, label="target")
plt.plot(a_vals, target, "*", label="qsvt")

plt.legend()
plt.show()

Corrected Code:

plt.plot(a_vals, target, label="target")
plt.plot(a_vals, qsvt, "*", label="qsvt")

plt.legend()
plt.show()

Tutorial Link

Intro to QSVT Link

[josh146]

Nice catch @elucidator8918! Would you like to open a PR to make this change to the demo? It is available here: https://github.com/PennyLaneAI/qml/blob/master/demonstrations/tutorial_intro_qsvt.py

[elucidator8918]

@josh146 Yes i would love to make the PR :)

[KetpuntoG]

@elucidator8918 thanks for work on this!