Hello everyone, I m currently working on a problem that is freaking me out a bit, suppose I have a second quantized hamiltonian:(adsbygoogle = window.adsbygoogle || []).push({});

\begin{eqnarray}

H=H_{0}+ \epsilon d^{\dagger}d + V(d{\dagger}c_{0} + h.c)

\end{eqnarray}

In terms of some new operators, I would like to rotate the hamiltonian, so that one part of it is diagonalised in the new operators, how can I do this¿ And compute the matrix elements

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# Second quantized hamiltonian change basis

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