Browsing by Author "Malomed, BA"

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Generation of photon-number-entangled soliton pairs through interactions
(2005-01-01)
Lee, RK
;
Lai, Y
;
Malomed, BA
;
光電工程學系
;
光電工程研究所
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.
Photon-number fluctuation and correlation of bound soliton pairs in mode-locked fiber lasers
(2005-11-15)
Lee, RK
;
Lai, YC
;
Malomed, BA
;
光電工程學系
;
Department of Photonics
Quantum photon-number fluctuation and correlation of bound soliton pairs in mode-locked fiber lasers are studied on the basis of the complex Ginzburg-Landau equation model. We find that, depending on their phase difference, the total photon-number noise of the bound soliton pair can be larger or smaller than that of a single soliton, and the two solitons in the soliton pair have a corresponding positive or negative photon-number correlation. It is predicted for the first time to our knowledge that out-of-phase soliton pairs can exhibit less noise as a result of negative correlation. (c) 2005 Optical Society of America.
Quantum correlations in bound-soliton pairs and trains in fiber lasers
(2004-12-01)
Lee, RK
;
Lai, Y
;
Malomed, BA
;
光電工程學系
;
光電工程研究所
Quantum correlations in pairs and arrays (trains) of bound solitons modeled by the complex Ginzburg-Landau equation (CGLE) are calculated numerically, on the basis of linearized equations for quantum fluctuations. We find strong correlations between the bound solitons, even though the system is dissipative. Some degree of the correlation between the photon-number fluctuations of stable bound soliton pairs and trains is attained and saturates after passing a certain distance. The saturation of the photon-number correlations is explained by the action of nonconservative terms in the CGLE. Photon-number-correlated bound soliton trains offer possibilities to produce multipartite entangled sources for quantum communication and computation.