RealOperatorCoulombSum

Represents a Coulomb tensor operator, with interactions defined as a 4-rank tensor.

Factories

CoulombSum(const RealTensor tensor) -> RealOperatorCoulombSum

Returns a Coulomb tensor operator $\sum_{i,j,k,l,\sigma,\sigma'} V_{ijkl} a_{i\sigma}^\dagger a_{j\sigma'}^\dagger a_{k\sigma'} a_{l\sigma}$.

The operator is parametrized by a 4-rank tensor $V_{ijkl}$ with $(L/2)^4$ elements. It acts on a $2^{L}$-dimensional Hilbert space assuming interleaved spins, where spatial orbital $i$ corresponds to spin-up position $2i$ and spin-down position $2i+1$.

Parameters

• tensor: The 4-rank tensor $V_{ijkl}$ representing the interaction.

Symbols

Name	Description
=	Assignment operator for Coulomb tensor operators.