Table 1 Basis functions f i(k) that form a complete basis for \(V({{{{{{{\bf{k}}}}}}}},{{{{{{{{\bf{k}}}}}}}}}^{{\prime} })={\sum }_{i}{v}_{i}{f}^{i}({{{{{{{\bf{k}}}}}}}}){\overline{f}}^{i}({{{{{{{\bf{{k}}}}}}}^{{\prime} }}})\) up to nearest-neighbor pairing interactions on the rectangular lattice

From: Light-induced switching between singlet and triplet superconducting states

Irrep.

Pairing

fi(k)

A

slocal

1

B

px

\(\sqrt{2}\sin {k}_{x}\)

B

py

\(\sqrt{2}\sin {k}_{y}\)

A

sext,x

\(\sqrt{2}\cos {k}_{x}\)

A

sext,y

\(\sqrt{2}\cos {k}_{y}\)

  1. Normalization is such that \(\int\frac{{d}^{2}k}{{(2\pi )}^{2}}{\overline{f}}^{i}({{{{{{{\bf{k}}}}}}}}){f}^{j}({{{{{{{\bf{k}}}}}}}})={\delta }_{ij}\).
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