https://github.com/qiskit-community/qgss-2025/blob/main/lab-2/Lab2.ipynb
- unwanted transformation that affects the expected outcome of measurement of a quantum state
- Coherent errors: gates; can be reversed; eg. instead of rotating qubit by $\theta$ angle, it gets rotated by $\theta + \epsilon$ angle.
- Incoherent errors: natural quantum causes; eg. need for cooling temperature down etc.
- Sources of noise:
- Relaxation time
- Dephasing time
- Single qubit gate fidelity
- Two qubit gate fidelity
- Readout assignment error: Incorrect qubit measurement
Accessing device properties Qiskit
https://quantum.cloud.ibm.com/docs/en/guides/get-qpu-information