Collective excitations of a spherical ultradilute quantum droplet

Self-Evaporation Dynamics of Quantum Droplets in a 41K-87Rb Mixture

“…where ∑ i N i = N and N 1 /N 2 = g 22 /g 11 [see Equation ( 4)]. Here ξ represents the length scale of the droplet [1,25] ξ =h…”

“…These findings have triggered an intense research activity on droplets properties (see, e.g., the recent reviews in Refs. [16,17]) and on the so-called Lee-Huang-Yang fluid [18][19][20], and have motivated further studies in low-dimensional systems [21,22] and also beyond Petrov's theory [23][24][25][26][27].…”

Dilute quantum liquid in a K-Rb Bose mixture

“…Variable most sensitive to beyond-LHY energy corrections appears to be the compressibility κ −1 , with a relative difference in the range ≈ 20% to 130%. This could have an impact on the collective excitation modes of a droplet [49], which will be investigated in a future study.…”

Three-body spin mixing in spin-1 Bose-Einstein condensates

“…These strengths can be extracted from the elastic three-body transition amplitude, as was recently demonstrated for spinless particles [19,[21][22][23]. Via this approach, the significance of three-body collisions in ultracold quantum gases was established for resonant s- [21,22] and p-wave [23] interactions and for weak interactions [19,22] where such collisions are predicted to stabilize a single-component BEC against collapse [19,20,[24][25][26]. In spinor condensates, multiple three-body spin channels are degenerate, resulting in effective three-body interaction strengths associated with each channel that is symmetric under particle exchange [16,17].…”