论文标题
与骨配对的自结合量子液滴的一致理论
Consistent theory of self-bound quantum droplets with bosonic pairing
论文作者
论文摘要
我们重新审视了Petrov {[} Phys提出的量子液滴的Bogoliubov理论。莱特牧师。 \ textbf {115}，155302（2015）{]}对于超低玻色豆混合物，在其中，平均田间塌陷通过Lee-huang-yang-yang量子量的波动稳定下来。我们表明，彼得罗夫理论中的漏洞，即，可以通过引入骨配对来自然消除软化复合物bogoliubov光谱的无知。配对会导致平均场景点较弱，并且在不平等的种内相互作用的情况下，Lee-huang-yang的术语也更强。结果，与最新的蒙特卡罗模拟观察结果一致，在深液滴状态下，自结界液滴形成的平衡密度显着降低。我们对一致的Bogoliubov理论的构建为理解实验{[} Science \ textbf {359}，301（2018）{]}中观察到的小量子液滴的低临界数量的小量子液滴铺平了道路。
We revisit the Bogoliubov theory of quantum droplets proposed by Petrov {[}Phys. Rev. Lett. \textbf{115}, 155302 (2015){]} for an ultracold Bose-Bose mixture, where the mean-field collapse is stabilized by the Lee-Huang-Yang quantum fluctuations. We show that a loophole in Petrov's theory, i.e., the ignorance of the softening complex Bogoliubov spectrum, can be naturally removed by the introduction of bosonic pairing. The pairing leads to weaker mean-field attractions, and also stronger Lee-Huang-Yang term in the case of unequal intraspecies interactions. As a result, the equilibrium density for the formation of self-bound droplets significantly decrease in the deep droplet regime, in agreement with a recent observation from diffusion Monte Carlo simulations. Our construction of a consistent Bogoliubov theory paves the way to understand the puzzling low critical number of small quantum droplets observed in the experiment {[}Science \textbf{359}, 301 (2018){]}.
