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Results tagged with hilbert-space
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user 121721
This tag is for questions relating to Hilbert Space, a vector space equipped with an inner product, an operation that allows defining lengths and angles, and the space is complete. It arises naturally and frequently in mathematics and physics, typically as infinite-dimensional function spaces having the property that it is complete. Applies also to pre-Hilbert spaces, rigged Hilbert spaces, and spaces with negative norm or zero-norm states.
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Two qubits system in polar co-ordinates
I know that I can write a single qubit state in terms of polar co-ordinates $(r,\theta,\phi)$ on a Bloch sphere.
\begin{equation}
\rho =
\begin{pmatrix}
\frac{1+r \cos\theta}{2} &\frac{r \exp(-i\phi …
