"Entanglement, Relativistic Causality and Independence between Quantum Field Systems"
A Talk By Giovanni Valente
Entanglement between distant quantum systems poses two main problems in philosophy of quantum mechanics. First, it undermines the possibility of achieving a division of the microscopic world into independent subsystems. Second, the non-local character of entangled correlations seems to entail a conflict with relativistic causality, namely the requirement that no causal process can propagate faster than light, thereby raising a threat of inconsistency with Einstein's theory of Special Relativity. In this talk, I'll discuss these problems within the framework of relativistic quantum field theory, that is our most successful theory about the microscopic world. In particular, I'll show how the notion of local operations assures consistency with relativistic causality. Then, I will address the question whether a quantum field system can be isolated from its entanglement with other spacelike separated systems by acting on it by means of a local operation.