arXiv 1105.44872011-05quant-phcond-mat.otherphysics.optics

玻色子模线性耦合、克尔非线性和强线性损耗的组合产生非经典态

Generators of nonclassical states by combination of the linear coupling of boson modes, Kerr nonlinearity and the strong linear losses

V. S. Shchesnovich, D. Mogilevtsev

备注：: 10 pages, 4 figures; typos in the text and figures were corrected
DOI：: 10.1103/PhysRevA.84.013805

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摘要：

利用克尔非线性、强线性吸收或损耗以及光模的线性耦合，可以构造光的量子态发生器。例如，我们的设置可以通过使用光纤技术来实现。我们详细考虑最简单的情况下，三个和四个耦合模式，其中一个强损耗模式是线性耦合到其他线性和非线性模式。在三模设计中，我们的方案模拟了三阶非线性吸收，允许产生单光子态，或双光子吸收允许产生相位态。在四模设计中，该方案模拟了非局域吸收，产生了两个非耦合模的纠缠态。我们还注意到，在后一种情况下，在相位状态产生的情况下，输出状态是在线性模式，这防止了其随后的退化伴随着强克尔非线性的强损耗。

英文摘要：

We show that the generators of quantum states of light can be built by employing the Kerr nonlinearity, a strong linear absorption or losses and the linear coupling of optical modes. Our setup can be realized, for instance, with the use of the optical fiber technology. We consider in detail the simplest cases of three and four coupled modes, where a strongly lossy mode is linearly coupled to other linear and nonlinear modes. In the three-mode design, our scheme emulates the third-order nonlinear absorption, allowing for generation of the single photon states, or the two-photon absorption allowing to generate the phase states. In the four-mode design, the scheme emulates a non-local absorption which produces an entangled state of two uncoupled modes. We also note that in the latter case and in the case of the phase states generation the output state is in the linear modes, which prevents its subsequent degradation by the strong losses accompanying the strong Kerr nonlinearity.

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