Entanglement transference and non-inertial quantum reference frames

Abstract

Given the recent interest in perspectival quantum reference frames (QRFs), we ask how quantum properties in the perspectival picture relate to their global (non-perspectival) counterparts. Such a connection could allow established quantum information to be understood from the perspective of QRFs. Specifically, we find sufficient conditions under which global entanglement decomposes into a combination of perspectival entanglement and coherence -- a phenomenon that we call entanglement transference. We apply this result to non-inertial QRFs, revisiting the problem of acceleration-induced entanglement degradation. We find that entanglement degradation in the perspectival picture can be offset by an increase in coherence resources. This novel insight into (relativistic) quantum resource transformations suggests that QRFs may play a useful role in understanding more general quantum resource and quantum information phenomena.