标题： 由玻色子模式的线性耦合、克尔非线性和强线性损耗组合产生的非经典态的生成器 显示英文标题

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

摘要： 我们证明，可以通过采用克尔非线性、强线性吸收或损耗以及光模式的线性耦合来构建光量子态的生成器。 我们的装置可以例如使用光纤技术来实现。 我们详细考虑了三个和四个耦合模式的最简单情况，其中一种强损耗模式与其它线性和非线性模式进行线性耦合。 在三模设计中，我们的方案模拟了三阶非线性吸收，允许生成单光子态，或者模拟两光子吸收以生成相位态。 在四模设计中，该方案模拟了非局域吸收，产生了两个未耦合模式的纠缠态。 我们还注意到，在后一种情况下以及在相位态生成的情况下，输出态位于线性模式中，这防止了其随后因伴随强克尔非线性而产生的强损耗而退化。 显示英文摘要

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.