Published in: Phys.Rev.A 54 1793-1797 (1996).
Abstract:
In entangled systems values cannot be assigned to all quantum mechanicalobservables of individual members of the systemindependent of the measurement context of the whole system.While various cases are known where properties like spin, momentum, energyetc. can be entangled, entanglement itself is usually considered to bean objective property of the system.We show that situations can arise where this is no longer the case and wheretherefore entanglement itself becomes an entangled property.