How to design multi controlled gate?

PennyLane Help Code Together
1

For example, I want to prepare a quantum state from 0, so I need use multi controlled RY gate, like this:image
How to design this gate? Any help will be appreciate!

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Hi @Geralt_Rivia, welcome to the Forum!

You can use qml.ctrl to create a controlled version of an operation. If you’re looking specifically for a controlled RY you can use our CRY operator. So you could add qml.ctrl on top of the CRY operation.

Please let me know if this is helpful!

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Thanks for your reply! It is very very useful!