[Documentation] Clarify the role of all the amplitude and detuning maximum values

[jpmoutinho]

Currently in the Qadence device creation there are max_amp and max_detuning values, which should affect the values of $\Omega$ and $\delta$ in the drive Hamiltonian. These values are used in the Pulser backend to create the respective Pulser devices on which pulse sequences are simulated. Currently, these values are not used in the PyQ backend, but that will be updated.

At the same time, in the AddressingPattern, there are values for the local maximum amplitude and detuning which essentially are the values of the $\Gamma$ and $\Delta$ parameters in the local-addressing Hamiltonian. Furthermore, in the addressing pattern creation these values are compared with a hardcoded "global" maximum amplitude and detuning.

• Are the global maximum amplitude and detuning from the addressing pattern the same that go into the device creation in the Pulser backend? Are they different?
• How are all of these values related and which should the user be able to change?
• Where is the best place for the user to set these values?