The two-state vector formalism (TSVF) is a description of quantum mechanics in terms of a causal relation in which the present is caused by quantum states

The two-state vector formalism (TSVF) is a description of quantum mechanics in terms of a causal relation in which the present is caused by quantum states of the past, and of the future, taken in combination. In TSVF, causality is time-symmetric... TSVF combines causality both from the past (forward causation) and the future (backwards causation, or retrocausality) https://en.wikipedia.org/wiki/Two-state_vector_formalism https://en.wikipedia.org/wiki/Two-state_vector_formalism