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:
Journal of Optics B-quantum and Semiclassical Optics
影响因子:
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通讯作者:
A. Klimov;J. Romero;J. Delgado;L. Sánchez‐Soto
A. Klimov;J. Romero;J. Delgado;L. Sánchez‐Soto
中科院分区:
其他
文献类型:
--
作者:
A. Klimov;J. Romero;J. Delgado;L. Sánchez‐Soto

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我们重新阐述了一个通用的方法来获得有效的哈密顿描述不同的非线性光学过程。该方法利用了SU(2)代数的非线性变形的存在,该变形是由于原始模型的动力学对称性而产生的。当一些物理参数(通常与色散极限有关)变小时,我们立即得到一个对角有效哈密顿量,它正确地表示了任意状态和长时间的动力学。我们应用该技术,以获得如何在原始模型中的噪声项在此计划下的转换,提供了一个系统的方法,包括阻尼效应的过程中描述的有效哈密顿量。
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.