operator+=()

State & syten::MPS::State::operator+=

(

State const &

other

)

Adds another state to this state as $|\psi \rangle \to |\psi\rangle + |\textrm{other}\rangle$.

Parameters

other

the added state

Returns

a handle to *this after addition.

MPS can be added using a tensor addition for each physical index, which is implemented below. The state can then usually be truncated very easily, but this is not done in the function itself.