  The assumption that wave function collapse is induced by correlating
interactions of the kind that constitute measurements leads to a stochastic
collapse equation that does not require the introduction of any new physical
constants and that is consistent with conservation laws. The collapse operator
is based on the interaction (potential) energy, with a variable timing
parameter related to the rate at which individual interactions generate the
correlations. The approximate localization of physical systems follows from the
distance-dependent nature of the interaction potentials. The equation is
consistent with strict conservation of momentum and orbital angular momentum,
and it is also consistent with energy conservation within the accuracy allowed
by the limited forms of energy that can be described within nonrelativistic
theory. The possibility of extending the proposal to a fully relativistic
version is discussed.

Quantum Physics