Questions tagged [circuit-construction]
For questions about the construction of complex circuits using elementary quantum gates.
5 questions from the last 30 days
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Procedure for constructing magic state gate injection gadgets
I have a quantum computer that cannot implement the gate $U$ by itself, and needs help in the form of a magic state $|U\rangle$ held in another register. Is there a general-purpose procedure for ...
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Pauli Twirling not increasing Circuit depth?
This paper talks about the properties of Pauli twirling a circuit. Pauli twirling is a technique that converts arbitrary quantum noise into Pauli errors by applying random Pauli gates before and after ...
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Linear combination of unitaries with Qiskit circuit
I'm reading the PennyLane tutorial on linear combination of unitaries (LCU) algorithm. Does Qiskit have any in-built functions that let me do the same thing?
Specifically, I want to build a circuit (...
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Custom Feature Map Error for VQR in Qiskit 'Input data has incorrect shape, last dimension is not equal to the number of inputs'
I am trying to use a VQR for solving a regression problem. My data has 5 features, I want to use 4 features to estimate 5th one. I made it work with ZFeatureMap but now I want to create my own feature ...
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How to design quantum circuits to encode the ket to the phase?
Suppose we have a function $f:\{0,1\}^n \rightarrow \{0,1,2,\cdots,k\}$, and a unitary $U|x\rangle |0\rangle =|x\rangle|f(x)\rangle$ for $x\in \{0,1\}^n$. Now we want to design a quantum circuit from $...
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