Nonlinearities in reservoir engineering: Enhancing quantum correlations

作者：Xiangming Hu, Qingping Hu, Lingchao Li, Chen Huang, Shi Rao · 发表于：Physical Review A · 年份：2017 · DOI：10.1103/physreva.96.063824 · 被引用次数：7 · 研究领域：Quantum Information and Cryptography、Quantum optics and atomic interactions、Mechanical and Optical Resonators

There are two decisive factors for quantum correlations in reservoir engineering, but they are strongly reversely dependent on the atom-field nonlinearities. One is the squeezing parameter for the Bogoliubov modes-mediated collective interactions, while the other is the dissipative rates for the engineered collective dissipations. Exemplifying two-level atomic ensembles, we show that the moderate nonlinearities can compromise these two factors and thus enhance remarkably two-mode squeezing and entanglement of different spin atomic ensembles or different optical fields. This suggests that the moderate nonlinearities of the two-level systems are more advantageous for applications in quantum networks associated with reservoir engineering.