dorsal/arxiv
View SchemaNonclassical statistics of intracavity coupled $\chi^{(2)}$ waveguides: the quantum optical dimer
| Authors | M. Bache, Yu. B. Gaididei, P. L. Christiansen |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0205029 |
| URL | https://arxiv.org/abs/quant-ph/0205029 |
| DOI | 10.1103/PhysRevA.67.043802 |
| Journal | Phys. Rev. A 67, 043802 (2003) |
Abstract
A model is proposed where two $\chi^{(2)}$ nonlinear waveguides are contained in a cavity suited for second-harmonic generation. The evanescent wave coupling between the waveguides is considered as weak, and the interplay between this coupling and the nonlinear interaction within the waveguides gives rise to quantum violations of the classical limit. These violations are particularly strong when two instabilities are competing, where twin-beam behavior is found as almost complete noise suppression in the difference of the fundamental intensities. Moreover, close to bistable transitions perfect twin-beam correlations are seen in the sum of the fundamental intensities, and also the self-pulsing instability as well as the transition from symmetric to asymmetric states display nonclassical twin-beam correlations of both fundamental and second-harmonic intensities. The results are based on the full quantum Langevin equations derived from the Hamiltonian and including cavity damping effects. The intensity correlations of the output fields are calculated semi-analytically using a linearized version of the Langevin equations derived through the positive-P representation. Confirmation of the analytical results are obtained by numerical simulations of the nonlinear Langevin equations derived using the truncated Wigner representation.
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"abstract": "A model is proposed where two $\\chi^{(2)}$ nonlinear waveguides are contained\nin a cavity suited for second-harmonic generation. The evanescent wave coupling\nbetween the waveguides is considered as weak, and the interplay between this\ncoupling and the nonlinear interaction within the waveguides gives rise to\nquantum violations of the classical limit. These violations are particularly\nstrong when two instabilities are competing, where twin-beam behavior is found\nas almost complete noise suppression in the difference of the fundamental\nintensities. Moreover, close to bistable transitions perfect twin-beam\ncorrelations are seen in the sum of the fundamental intensities, and also the\nself-pulsing instability as well as the transition from symmetric to asymmetric\nstates display nonclassical twin-beam correlations of both fundamental and\nsecond-harmonic intensities. The results are based on the full quantum Langevin\nequations derived from the Hamiltonian and including cavity damping effects.\nThe intensity correlations of the output fields are calculated\nsemi-analytically using a linearized version of the Langevin equations derived\nthrough the positive-P representation. Confirmation of the analytical results\nare obtained by numerical simulations of the nonlinear Langevin equations\nderived using the truncated Wigner representation.",
"arxiv_id": "quant-ph/0205029",
"authors": [
"M. Bache",
"Yu. B. Gaididei",
"P. L. Christiansen"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.67.043802",
"journal_ref": "Phys. Rev. A 67, 043802 (2003)",
"title": "Nonclassical statistics of intracavity coupled $\\chi^{(2)}$ waveguides: the quantum optical dimer",
"url": "https://arxiv.org/abs/quant-ph/0205029"
},
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