# Questions tagged [initialization]

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

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### Initializing qubits in Ca$^+$ ion

In Chapter 13 of "Quantum Computing - From Linear Algebra to Physical Realizations" by Nakahara and Ohmi, there is a discussion about initializing qubits in a trapped Ca$^+$ qubit. The ...
109 views

### Survey of which 'physically interesting' many-body states can be efficiently prepared on a quantum computer?

For digital quantum simulation of many-body problems, efficiently preparing an initial state of 'physical interest' (e.g. ground states, thermal states, topologically ordered states etc.) is very ...
73 views

### How to initialize a function in Qiskit with 3 qubit? [closed]

I would like to know how I can make an initialization with 3 qubits to get |000> ,|100> , |111> ( 1 qubit --> |000> , |ψ⟩ = |000⟩ ⊗ |100⟩ ⊗ |111⟩)
123 views

### 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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155 views

### 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}\...
143 views

### 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() ...
207 views

### 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 ...
77 views

### 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 ...
83 views