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Questions tagged [quantum-theory]

For general questions about quantum theory (quantum mechanics and quantum field theories), as relevant to quantum computing and/or quantum information.

5
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2answers
147 views

Why is the state of multiple qubits given by their tensor product?

How did we derive that the state we get by $n$ qubits is their tensor product? You can use $n=2$ in the explanation for simplicity.
1
vote
1answer
89 views

Is the computational basis for Hilbert space transfinite?

In What is the Computational Basis? gIS states: One also often speaks of "computational basis" for higher-dimensional states (qudits), in which case the same applies: a basis is called "...
4
votes
2answers
165 views

What is the “CP” operation in the context of anti-particles? [closed]

In this question on Quora: What is meant by "the photon is its own antiparticle"?, an answer is given which states: In quantum theory, we have a procedure for transforming the wave function of a ...
6
votes
0answers
133 views

What can tensor networks mean for quantum computing?

I am trying to understand what the importance of tensor networks is (or will/could be) for quantum computing. Does it make sense to study tensor networks deeply and develop them further to help pave ...
3
votes
1answer
139 views

What kind of mathematics is common in quantum computing? [closed]

From what I have seen so far, there is a lot of linear algebra. Curious what other kinds of maths are used in QC & the specific fields in which they are most predominately invoked.
4
votes
1answer
198 views

How can surreal maths be used in quantum computing? [closed]

The question whether surreal or hyperreal numbers (that both contain the reals, even if they have the same cardinality) could be useful to provide a more satisfactory theory of QM is maybe more ...