Helium nanodroplets and trapped Bose-Einstein condensates as prototypes of finite quantum fluids

Abstract

Helium nanodroplets and trapped Bose-Einstein condensates in dilute atomic gases offer complementary views of fundamental aspects of quantum many-body systems. We discuss analogies and differences, stressing their common theoretical background and peculiar features. We briefly review some relevant concepts, such as the meaning of superfluidity in finite systems, the behavior of elementary excitations and collective modes, as well as rotational properties and quantized vorticity.

15 pages, 1 eps figure, review article for J. Chem. Phys., thematic issue on Helium Nanodroplets

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Cited by in corpus (23)

• Quantum liquid droplets in a mixture of Bose-Einstein condensates
• Self-bound quantum droplets in atomic mixtures
• Self-bound droplets of a dilute magnetic quantum liquid
• Spectroscopy and dynamics in helium nanodroplets
• New states of matter with fine-tuned interactions: quantum droplets and dipolar supersolids
• Cold Physics and Chemistry: Collisions, Ionization and Reactions inside Helium Nanodroplets Close to Zero K
• Collective excitations of self-bound droplets of a dipolar quantum fluid
• Self-trapping of impurities in Bose-Einstein condensates: Strong attractive and repulsive coupling
• Vortices in self-bound dipolar droplets
• Pattern Formation in Quantum Ferrofluids: from Supersolids to Superglasses
• Liquid quantum droplets of ultracold magnetic atoms
• Self-bound dipolar droplets and supersolids in molecular Bose-Einstein condensates
• Intense pulsed helium droplet beams
• $\alpha$-particle condensate states in ${}^{16}$O
• Thermal instability, evaporation and thermodynamics of one-dimensional liquids in weakly-interacting Bose-Bose mixtures
• Spectroscopy of free radicals and radical containing entrance-channel complexes in superfluid helium nano-droplets
• Natural Orbitals and BEC in traps, a diffusion Monte Carlo analysis
• Quantum dilute droplets of dipolar bosons at finite temperature
• Diagrammatic calculation of energy spectrum of quantum impurity in degenerate Bose-Einstein condensate
• Self-bound droplets of light with orbital angular momentum
• Damping of bulk excitations over an elongated BEC - the role of radial modes
• Temperature Dependence of the Density and Excitations of Dipolar Droplets
• Vortices in nonlocal Gross-Pitaevskii equation