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[1.4] Terms 'axis' and 'basis' are mixed up

1

### Describe the issue At the beginning of section _4. Digression: Measuring in Different Bases_ we can see the following text: > We have seen that the Z-axis is not...

4erf

Add Solutions for clarity of students reading the book

8

**Is your feature request related to a problem? Please describe.** Not a problem, an appendix with answers to the exercises would be helpful for everyone reading the book. **Describe the...

AnDa-creator

Lab 7. Quantum Simulation as a Search Algorithm

2

### Describe the issue In Part 1: Hamiltonian Simulation the Time evolution operator is exp(-i x Theta x (|0>

j125330

### Describe the issue At the end of section _7. The U-gate_ we can see the following sentence: > These gates do a quarter-turn with respect to the X-axis around...

4erf

### Describe the issue In Example: 4-qubit HHL, the labels 1 and 2 for the eigenvalues and eigenvectors are inconsistent. https://qiskit.org/textbook/ch-applications/hhl_tutorial.html ### Describe what you expect to see |u1> and...

nkongsuwan

[3.4] Modification to increase clarity

2

### Describe the issue The issue is more about readability and clarity rather than inaccuracy. The line "Measuring the first register will give an output only if: " is slightly...

plancker

[2.4.3] CZ/CY instead of CNOT

2

## Describe the Issue 1. In section 2.4.3 on Controlled Rotations, the line "A controlled R_x(θ) could similarly be made using CNOT gates." seems incorrect. 2. I assume that the...

plancker

### Describe the issue Book Section: https://qiskit.org/textbook/ch-applications/qaoa.html#The-QAOA-circuit In QAOA - The QAOA circuit, I noticed the circuits were appended to the main circuit with the wrong order, ``` qc_qaoa =...

iR150463

[4.1.2 Simulating Molecules using VQE] Code example uses Aqua, which is on deprecation path

4

### Describe the issue The code example in https://qiskit.org/textbook/ch-applications/vqe-molecules.html still uses qiskit-aqua, which is being deprecated and it is going to be removed from Qiskit soon (maybe in the next...

1ucian0

Cannot run any examples in section 1.4

1

### Describe the bug After pressing any *try* button, it gets stuck in "Waiting for kernel...". ### To Reproduce Press the *try* button in a code example. ### Expected behavior...

accursoft