<p>I think that depends on what are you going to do with these numbers after you have mapped them to qubits.</p>

<p>If you need to use 2ⁿ numbers to prepare a quantum state on n qubits that is a weighted superposition of the basis states, you can use <a href="https://docs.microsoft.com/en-us/qsharp/api/qsharp/microsoft.quantum.preparation.preparearbitrarystate" rel="nofollow noreferrer">PrepareArbitraryState</a> operation which does exactly that. Internally it implements the paper <a href="https://arxiv.org/abs/quant-ph/0406176" rel="nofollow noreferrer">Synthesis of Quantum Logic Circuits</a> by Shende, Bullock, Markov.</p>

<p>If you need to represent these numbers in a way that would allow you to read them out by measuring the qubits, you might have to do something like convert them in binary and store each bit in a separate qubit.</p>
How can I map a complex number to a qubit in Q#?
<p>In theory, the state of a qubit is defined by 2 complex numbers, following this formula:</p>

<p><img src="https://i.stack.imgur.com/fG1Q4.png" alt="Image for formula of qubit superposition state"></p>

<p>The rule is that the amount of complex numbers needed to define the state of a set of qubits is equal to 2ⁿ, where n is the number of used qubits.</p>

<p>if i have an array of complex numbers, how can I map or assign each number to a qubit?</p>

<p>For instance:
I have this complex number: 0.0020908999722450972 + i*0.001669629942625761.
What would the state of a qubit be in this case?
Would I be needing more qubits to represent this number?</p>