# Questions tagged [initialization]

For questions regarding the initial state of a system for quantum computation and their preparation.

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### Reducing circuit initialization complexity

I'm encoding data into a QuantumCircuit via the Initialize method for QFTs. In doing this and transpiling for IonQ backends, I'm getting rather complex circuits. Is there a way to encode this data ...
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### How to initialize a $n$ qubit system in this specific state

Basically, I have $2n$ qubits and I want to initialize them in the state $\frac{|\psi\rangle}{\lVert |\psi\rangle \rVert}$ where |\psi \rangle = \sum_{\mathrm{w}\in \{0,1\}^n}|\mathrm{w}\mathrm{w}\...
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### How to get precise angle values in Qiskit while using initialize() function to generate arbitrary quantum state?

Is there any way to get the quantum gate values more precisely in qiskit? For example, if I want to create 1/√3[|00⟩+|01⟩+|11⟩]. By using initialize() I get the following circuit by using the draw() ...
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### What are the mathematics and theory behind Initializing a quantum state vector?

I do not understand how the initialize function in QiSkit is working. I know that it is used to put a qubit in a specific custom state. My question is - how is it implemented or how to do such a thing ...
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### From the final quantum state to the quantum circuit composition

When I build a quantum circuit and my initial state is the one composed only by zeros ($|000\ldots 0\rangle$), I have a final state $|\psi\rangle$ that is the result of the application of the quantum ...
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### Projective measurements: aftermath and restoration

I have some practical difficulties with projective measurements, so I'd welcome inspiration from others. This is beyond the question "Are true Projective Measurements possible experimentally?" in that ...
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