Bose-Einstein condensate 1 Bose-Einstein condensates 1 Bose-Einstein condensation 1 Experimental realizations 1 Gases 1 In-shell Matter waves 1 Matter-wave lensing 1 Numerical methods 1 Quantum gas 1 Radio-frequency dressing 1 Radiofrequencies 1 Shell-shaped quantum gas 1 Shells (structures) 1 Statistical mechanics 1 Ultracold quantum gas 1 matter-wave lensing 1 radio-frequency dressing 1 shell-shaped quantum gases 1