Experimental realization of spatially separated entanglement with continuous variables using laser pulse trains.

Scientific reports

PubMedID: 26278478

Zhang Y, Okubo R, Hirano M, Eto Y, Hirano T. Experimental realization of spatially separated entanglement with continuous variables using laser pulse trains. Sci Rep. 2015;513029.
Spatially separated entanglement is demonstrated by interfering two high-repetition squeezed pulse trains. The entanglement correlation of the quadrature amplitudes between individual pulses is interrogated. It is characterized in terms of the sufficient inseparability criterion with an optimum result of in the frequency domain and in the time domain. The quantum correlation is also observed when the two measurement stations are separated by a physical distance of 4. 5?m, which is sufficiently large to demonstrate the space-like separation, after accounting for the measurement time.