Two polaron flavors of the Bose-Einstein condensate impurity
Two polaron flavors of the Bose-Einstein condensate impurity
复制标题
DOI：
10.1103/physreva.88.053610
复制
发表时间：
2013-11
影响因子：
2.9
通讯作者：
A. Blinova;M. Boshier;E. Timmermans
中科院分区：
文献类型：
--
作者：
A. Blinova;M. Boshier;E. Timmermans
我们发现，在稀薄气体玻色-爱因斯坦凝聚体（BEC）排斥中性原子杂质可以自局域在气泡极化子状态正式类似于氦中的电子泡。BEC是第一个已知同时表现出Landau-Pekar极化子态和自定域气泡极化子态的杂质宿主介质，Landau-Pekar极化子态类似于介电晶格中的自定域电子。我们发现，中性BEC杂质系统是充分的特点，只有两个无量纲耦合常数和一个单一的BEC杂质，可以转向从朗道Pekar气泡区域的几何。绝热变化是一个交叉，而不是一个过渡。
We show that repulsive neutral-atom impurities in a dilute gas Bose-Einstein condensate (BEC) can self-localize in bubble polaron states formally analogous to electron bubbles in helium. The BEC is then the first impurity host medium known to exhibit both Landau-Pekar polaron states akin to that of self-localized electrons in a dielectric lattice and self-localized bubble polaron states. We find that the neutral BEC-impurity system is fully characterized by only two dimensionless coupling constants and that a single BEC impurity can be steered adiabatically from the Landau-Pekar to the bubble region. The adiabatic change is that of a crossover, not a transition.