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arXiv 0903.3523quant-ph
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电介质中的有效非线性哈密顿量

Effective nonlinear Hamiltonians in dielectric media

J. A. Crosse, Stefan Scheel

摘要:

我们推导出一个有效的哈密顿量的非线性过程中的参数下转换吸收的存在。基于量子化电磁场的格林函数方法,首先建立了单原子在外加电场和介质吸收作用下的海森堡运动方程。然后,在微扰理论中求解运动方程到二阶,在微扰波近似下,产生从自由空间非线性光学已知的标准有效相互作用哈密顿量。在第二步中,我们推导了嵌入在介质中的原子的局域场修正的哈密顿量,即非线性晶体。在这里,我们表明,由此产生的有效哈密顿量是三线性的电和噪声极化领域,因此能够描述非线性噪声过程。此外,它减少到现象学的非线性哈密顿的情况下,噪声偏振场,因此吸收,消失。

英文摘要:

We derive an effective Hamiltonian for the nonlinear process of parametric down conversion in the presence of absorption. Based upon the Green function method for quantizing the electromagnetic field, we first set up Heisenberg's equations of motion for a single atom driven by an external electric field and in the presence of an absorbing dielectric material. The equations of motion are then solved to second order in perturbation theory which, in rotating-wave approximation, yields the standard effective interaction Hamiltonian known from free-space nonlinear optics. In a second step, we derive the local-field corrected Hamiltonian for an atom embedded in a dielectric host medium, i.e. a nonlinear crystal. Here we show that the resulting effective Hamiltonian is trilinear in the electric and noise polarization fields, and is thus capable of describing nonlinear noise processes. Furthermore, it reduces to the phenomonological nonlinear Hamiltonian for the cases where the noise polarization field, and hence absorption, vanishes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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