论文标题
通过正交挤压来增强Kerr振荡器中Wigner负性的形成
Enhancing the Formation of Wigner Negativity in a Kerr Oscillator via Quadrature Squeezing
论文作者
论文摘要
研究了由纳米力学系统进行量子实验的动机，研究了KERR振荡器的演变，重点是创建具有负函数的状态的状态。使用相位空间形式主义，提出了结果，证明了在统一进化下挤压真空状态的负面性的大挤压方案中的渐近行为。分析和模型扩展到开放系统的挤压真空状态，从而增加了阻尼和脱去的脱谐作用。为了提高实验性相关性，考虑了强阻尼状态。研究了这些效果，从而在大型挤压状态下为这些影响的行为产生了相似的渐近结果。结合了这些结果，可以表明，与阻尼相比，可以通过增加初始状态的挤压来改善弱的非线性。还表明这可以在不加剧dephasing的影响的情况下完成。
Motivated by quantum experiments with nanomechanical systems, the evolution of a Kerr oscillator with focus on creation of states with a negative Wigner function is investigated. Using the phase space formalism, results are presented that demonstrate an asymptotic behavior in the large squeezing regime for the negativity of a squeezed vacuum state under unitary evolution. The analysis and model are extended to squeezed vacuum states of open systems, adding the decoherence effects of damping and dephasing. To increase experimental relevance, the regime of strong damping is considered. These effects are investigated, yielding similar asymptotic results for the behavior of these effects in the large squeezing regime. Combining these results, it is shown that a weak nonlinearity as compared to damping may be improved by increasing the squeezing of the initial state. It is also shown that this may be done without exacerbating the effects of dephasing.
