当前位置: X-MOL 学术Chem. Phys. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Attractive Bose-Einstein condensates in anharmonic traps: Accurate numerical treatment and the intriguing physics of the variance
Chemical Physics ( IF 2.3 ) Pub Date : 2018-09-22 , DOI: 10.1016/j.chemphys.2018.09.029
Ofir E. Alon , Lorenz S. Cederbaum

The dynamics of attractive bosons trapped in one dimensional anharmonic potentials is investigated. Particular emphasis is put on the variance of the position and momentum many-particle operators. Coupling of the center-of-mass and relative-motion degrees-of-freedom necessitates an accurate numerical treatment. The multiconfigurational time-dependent Hartree for bosons (MCTDHB) method is used, and high convergence of the energy, depletion and occupation numbers, and position and momentum variances is proven numerically. We demonstrate for the ground state and out-of-equilibrium dynamics, for condensed and fragmented condensates, for small systems and en route to the infinite-particle limit, that intriguing differences between the density and variance of an attractive Bose-Einstein condensate emerge. Implications are briefly discussed.



中文翻译:

非谐陷阱中有吸引力的玻色-爱因斯坦凝聚物:精确的数值处理和方差的诱人物理学

研究了被捕获在一维非调和势中的吸引玻色子的动力学。特别强调位置和动量多粒子算子的方差。质量中心和相对运动自由度的耦合需要精确的数值处理。使用了多配置的时间相关的玻色子哈特里哈特(MCTDHB)方法,并通过数值证明了能量,耗竭和占有数以及位置和动量方差的高度收敛性。我们展示了基态和不平衡动力学,冷凝水和零散冷凝水,小型系统和途中的情况到无穷大的极限,吸引人的玻色-爱因斯坦凝聚物的密度和方差之间出现了令人着迷的差异。涵义进行了简要讨论。

更新日期:2018-09-25
down
wechat
bug