Artículos de revistas
Extra phase noise from thermal fluctuations in nonlinear optical crystals
Fecha
2009Registro en:
PHYSICAL REVIEW A, v.79, n.6, 2009
1050-2947
10.1103/PhysRevA.79.063816
Autor
CESAR, J. E. S.
COELHO, A. S.
CASSEMIRO, K. N.
VILLAR, A. S.
LASSEN, M.
Nussenzveig, Paulo Alberto
Martinelli, Marcelo
Institución
Resumen
We show theoretically and experimentally that scattered light by thermal phonons inside a second-order nonlinear crystal is the source of additional phase noise observed in optical parametric oscillators. This additional phase noise reduces the quantum correlations and has hitherto hindered the direct production of multipartite entanglement in a single nonlinear optical system. We cooled the nonlinear crystal and observed a reduction in the extra noise. Our treatment of this noise can be successfully applied to different systems in the literature.