Density-Functional Theory of Quantum Droplets  

作　　者：Fan Zhang Lan Yin 张帆;尹澜(Hefei National Laboratory,Hefei 230088,China;School of Physics,Peking University,Beijing 100871,China)

机构地区：[1]Hefei National Laboratory,Hefei 230088,China [2]School of Physics,Peking University,Beijing 100871,China

出　　处：《Chinese Physics Letters》2025年第1期28-33,共6页中国物理快报(英文版)

摘　　要：In quantum droplets,the mean-field energy is comparable to the Lee-Huang-Yang(LHY)energy.In the Bogoliubov theory,the LHY energy of a quantum droplet has an imaginary part,which has been neglected in most studies for practical purposes.Thus far,most theoretical studies on quantum droplets have been based on the extended Gross-Pitaevskii(GP)equation,which includes the contribution of the LHY energy to the chemical potential.In this article,we present the density-functional theory of quantum droplets.In our approach,the quantum fluctuations in quantum droplets,as described by an effective action,generate a real correlation energy that can be determined consistently.Using density-functional theory,we calculated the energy,quantum depletion fraction,and excitations of the droplet.Our results for the ground-state energy and quantum depletion fractions were consistent with the Monte Carlo results.We also discuss the implications of our theory.

关 键 词：potential. theory. QUANTUM 

分 类 号：O413[理学—理论物理]