How do I output a Cirq gate as a Numpy array? For example, I would like to print a Pauli X gate cirq.X as
numpy.array([[0,1],[1,0]])
Thank you.
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This can be done by calling cirq.unitary.
>>> import cirq
>>> cirq.unitary(cirq.X)
array([[0.+0.j, 1.+0.j],
[1.+0.j, 0.+0.j]])
answered Oct 14 '20 at 14:28
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$\begingroup$ Thanks a lot! Compared to Qiskit, I found Cirq has very little documentation. Do you have any recommendation for getting familiar with Cirq? $\endgroup$ – user3886914 Oct 14 '20 at 15:59
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$\begingroup$ @user3886914 Which types of documentation do you feel are missing? E.g. there's a decent API reference at readthedocs, but not a lot of task-oriented content like a guided tutorial to do goal X. $\endgroup$ – Craig Gidney Oct 14 '20 at 16:42
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$\begingroup$ @CraigGidney Compared to Qiskit, I feel that Cirq's tutorial and documents are too short. (Though, I just realized
cirq.unitary()is mentioned in the tutorial page, so that's my bad.) Also, details of the API are sometimes located only in their source code, so I found it a bit difficult to learn Cirq. I think extensive tutorial videos on Youtube would be very helpful. $\endgroup$ – user3886914 Oct 15 '20 at 4:57
