> Weak measurements do destroy some entanglement, just not "all" of it.
Which measure of degree of entanglement best characterizes state linkage across spacetime?
Depending on definition, doesn't a laser pointer entangle phase states across spacetime, but only slower than c (the speed of transverse photonic waves in a total vacuum)? Are the states synchronized with a constant delay?
> In quantum information theory, quantum discord is a measure of nonclassical correlations between two subsystems of a quantum system. It includes correlations that are due to quantum physical effects but do not necessarily involve quantum entanglement.
Which measure of degree of entanglement best characterizes state linkage across spacetime?
Depending on definition, doesn't a laser pointer entangle phase states across spacetime, but only slower than c (the speed of transverse photonic waves in a total vacuum)? Are the states synchronized with a constant delay?
Quantum discord: https://en.wikipedia.org/wiki/Quantum_discord :
> In quantum information theory, quantum discord is a measure of nonclassical correlations between two subsystems of a quantum system. It includes correlations that are due to quantum physical effects but do not necessarily involve quantum entanglement.
Quantum mutual information: https://en.wikipedia.org/wiki/Quantum_mutual_information