tlquantum.tt_contraction.contraction_eq

tlquantum.tt_contraction.contraction_eq(nqubits, nlayers, kept_inds=None, to_ket=False, to_operator=False)[source]

Generates einsum contraciton equation.

Parameters:

nqubitsint, number of qubits to contract over

nlayersint, number of layers to contract over

kept_indslist of inds, qubit indices to keep. If not None, then ptrace equation is generated

Returns:

string of the contraction equation.