论文标题
通过少数热量子分裂的纠缠生长
Entanglement growth via splitting of a few thermal quanta
论文作者
论文摘要
Quanta拆分是高斯纠缠的必不可少的生成器，以爱因斯坦 - 波多尔斯基 - 罗森状态，显然是最常见的纠缠形式。通常，这是由于具有高度连贯和低噪声外部驱动器的非线性过程的强烈泵送而产生的。相比之下，最近涉及被困离子和超导电路中有效三线性过程的实验开辟了测试一些热量子的分裂的互补可能性。由如此小的热能刺激，强烈的退化三联耦合会产生大量的非经典性，可通过超过3 dB的可馏出的正交挤压来检测。可以通过频繁的被动线性耦合与与三联耦合并行存在的第三模式生成实质性的纠缠。这种新形式的纠缠形式在任何高斯近似之外，都随着平均分量量子的平均数量而生长。高斯纠缠中缺乏的质量。使用可蒸馏的挤压，我们阐明了这种非线性骨系统的新纠缠机制。
Quanta splitting is an essential generator of Gaussian entanglement, exemplified by Einstein-Podolsky-Rosen states and apparently the most commonly occurring form of entanglement. In general, it results from the strong pumping of a nonlinear process with a highly coherent and low-noise external drive. In contrast, recent experiments involving efficient trilinear processes in trapped ions and superconducting circuits have opened the complementary possibility to test the splitting of a few thermal quanta. Stimulated by such small thermal energy, a strong degenerate trilinear coupling generates large amounts of nonclassicality, detectable by more than 3 dB of distillable quadrature squeezing. Substantial entanglement can be generated via frequent passive linear coupling to a third mode present in parallel with the trilinear coupling. This new form of entanglement, outside any Gaussian approximation, surprisingly grows with the mean number of split thermal quanta; a quality absent from Gaussian entanglement. Using distillable squeezing we shed light on this new entanglement mechanism for nonlinear bosonic systems.
