  Two new simple schemes for generating macroscopic (many-photon)
continuous-variable entangled states by means of continuous interactions
(rather than collisions) between solitons in optical fibers are proposed.
First, quantum fluctuations around two time-separated single-component temporal
solitons are considered. Almost perfect correlation between the photon-number
fluctuations can be achieved after propagating a certain distance, with a
suitable initial separation between the solitons. The photon-number correlation
can also be achieved in a pair of vectorial solitons with two polarization
components. In the latter case, the photon-number-entangled pulses can be
easily separated by a polarization beam splitter. These results offer novel
possibilities to produce entangled sources for quantum communication and
computation.
