  We argue that gravitational interactions between particles require a
departure from the conventional picture of the quantum state of a multiparticle
system in terms of tensor products of one-particle states. This modification is
essential in order to accommodate the existence of a new boost-like
relativistic angular momentum charge which pairs of particles must carry
asymptotically due to long-range effects of gravity. These findings challenge
conventional assumptions, prompting a reevaluation of the constraints on
quantum entanglement between particle subsystems in a black hole geometry.
