Master equations for effective Hamiltonians
Master equations for effective Hamiltonians
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DOI:
10.1088/1464-4266/5/1/304
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发表时间:
2002-08
期刊:
影响因子:
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通讯作者:
A. Klimov;J. Romero;J. Delgado;L. Sánchez‐Soto
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文献类型:
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作者:
A. Klimov;J. Romero;J. Delgado;L. Sánchez‐Soto
We re-elaborate on a general method for obtaining effective Hamiltonians that describe different nonlinear optical processes. The method exploits the existence of a nonlinear deformation of the su(2) algebra that arises as the dynamical symmetry of the original model. When some physical parameter (usually related to the dispersive limit) becomes small, we immediately get a diagonal effective Hamiltonian that represents correctly the dynamics for arbitrary states and long times. We apply the technique to obtain how the noise terms in the original model transform under this scheme, providing a systematic way of including damping effects in processes described in terms of effective Hamiltonians.