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Hi, I need help me with figuring out the 3-qubit phase shift circuit without any ancillas similar to the 2-qubit circuit shown in below attached picture....... Please do let me know! Thanks in advance! Also, I've written down the matrix/operator equivalent to 3-qubit phase-shift circuit in the picture itself... Restrictions would be to not use any Ancilla's and it would be better if we can implement using only CNOT & single qubit gates.....