Scheme for the generation of entangled solitons for quantum communication

Gerd Leuchs, Timothy C. Ralph, Christine Silberhorn +1 more

Quantum-communication needs a source of entanglement which is accessible to non-local measurements. It is shown that an entangled pair of light beams may be generated from two bright amplitude squeezed beams. This is applicable to light pulses and to optical solitons in fibres. A possible experimental scheme for stroboscopic quantum teleportation is discussed.

Yu. P. Rybakov, T. F. Kamalov

Ray‐Kuang Lee, Yinchieh Lai, Boris A. Malomed

Two 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 passing 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 possibilities to produce entangled sources for quantum communication and computation.

Andreas Sizmann

Eduard Schmidt, L. Knöll, Dirk‐Gunnar Welsch

HE Qi-si

A modulation method of a quantum communication system is studied and a scheme of modulating quantum states in high-speed with soliton is proposed in the paper. The transmission evolution of soliton in NLSE optic fiber and in SIT media is demonstrated by modulating communication channel of quantum state, respectively. It is concluded that two-component transmission line can produce quantum entangled states (or squeezed states) in the soliton transmission.The wavicle of light is used for the modulation and the properties of quantum and soliton are fused. This scheme is a development trend for future quantum communication.