See accompanying Physics Viewpoint
Using a superconducting circuit, the Josephson mixer, we demonstrate the first experimental realization of spatially separated two-mode squeezed states of microwave light. Driven by a pump tone, a first Josephson mixer generates, out of quantum vacuum, a pair of entangled fields at different frequencies on separate transmission lines. A second mixer, driven by a π-phase shifted copy of the first pump tone, recombines and disentangles the two fields. The resulting output noise level is measured to be lower than for the vacuum state at the input of the second mixer, an unambiguous proof of entanglement. Moreover, the output noise level provides a direct, quantitative measure of entanglement, leading here to the demonstration of 6  Mebit·s-1 (mega entangled bits per second) generated by the first mixer.
© 2012 American Physical Society
DOI:    10.1103/PhysRevLett.109.183901
PACS:    42.65.Lm, 03.67.-a, 84.40.Dc, 85.25.-j
*Corresponding author.
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Can we adapt this technique to make for Alice & Bob spatially separated

|Alice, Bob> = (1/2)^1/2[|zAlice>|z'Bob> + |z"Alice>|z"'Bob>]

for distinguishable non-orthogonal over-complete macro-quantum coherent Glauber states |z> where the z's are complex numbers of wave amplitude and phase.

Therefore, the now violated Born rule is

P(z'Bob) = TraceAlice{|Alice,Bob><Bob,Alice| |z'Bob><Bobz'|} = (1/2)(1 + |<Alicez|z"Alice>|^2)

giving a non-local entanglement signal.

Of course one can force the ad-hoc normalization

|Alice, Bob> = (1/2(1 + |<Alicez|z"Alice>|^2))^1/2[|zAlice>|z'Bob> + |z"Alice>|z"'Bob>]

to get P(z'Bob) = 1/2

but this seems odd to my intuition since the normalization needed will depend on the future free will choice that Bob makes.
Such retro-causal delayed choice normalization of the entangled state is not part of orthodox quantum theory. The orthodox quantum pundits have a real dilemma here. ;-)