Superfluid phases and excitations in a cold gas of d-wave interacting bosonic atoms and molecules  

作　　者：Zehan Li Jian-Song Pan W Vincent Liu 李泽汉;Jian-Song Pan;W Vincent Liu(Department of Physics and Astronomy,University of Pittsburgh,Pittsburgh,PA 15260,USA;Wilczek Quantum Center,School of Physics and Astronomy and T.D.Lee Institute,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]Department of Physics and Astronomy,University of Pittsburgh,Pittsburgh,PA 15260,USA [2]Wilczek Quantum Center,School of Physics and Astronomy and T.D.Lee Institute,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Chinese Physics B》2021年第6期463-468,共6页中国物理B（英文版）

基　　金：supported by the AFOSR (Grant No. FA9550-16-1-0006);the MURI-ARO (Grant No. W911NF17-1-0323);the National Natural Science Foundation of China (Grant Nos. 11904228, 11804221, and 11655002);the National Postdoctoral Program for Innovative Talents of China (Grant No. BX201700156);the Science and Technology Commission of Shanghai Municipality,China (Grant No. 16DZ2260200)。

摘　　要：Motivated by recent advances in orbitally tuned Feshbach resonance experiments, we analyze the ground-state phase diagram and related low-energy excitation spectra of a d-wave interacting Bose gas. A two-channel model with d-wave symmetric interactions and background s-wave interactions is adopted to characterize the gas. The ground state is found to have three interesting superfluid phases: atomic, molecular, and atomic–molecular. In great contrast to what was previously known about the p-wave case, the atomic superfluid is found to be momentum-independent for the d-wave case discussed here. The Bogoliubov spectra above each superfluid phase are obtained both analytically and numerically.

关 键 词：d-wave interaction quantum gas Bogoliubov spectrum SUPERFLUID 

分 类 号：O469[理学—凝聚态物理]