QUANTAMI (Quantum Atomic Mixtures: Droplets, Topological Structures, and Vortices) aims to explore novel matter phases and quantum phenomena arising in interacting multicomponent superfluids. We will exploit the K-Rb tunable quantum mixture manipulated in optical potentials to realize and study topological superfluid structures, like rings and shells, as well as exotic vortex states and rotating droplets. We will explore the complex interplay among interactions, quantum fluctuations, topological excitations and dimensionality. The project founded by MUR is a joint effort between CNR-INO (local coordinator Dr. A. Burchianti), the University of Padova (project coordinator Prof. L. Salasnich) and the University of Parma (local coordinator: Prof. S. Wimberger). Join us on this adventure! We are looking for motivated candidates for a postdoc position: further informations |

We have completed the design and testing of a custom high-resolution objective with a long working distance. The microscope consists of a commercial aspheric lens plus a meniscus lens and has a diffraction-limited resolution of 1.2 micron at 766 nm.
We have performed some preliminary tests by recording the in-situ density distribution of a strongly attractive |

We studied the coupled dipole dynamics of a L. Cavicchioli et al. |

Together with Giacomo Bighin and Tommaso Macrì, we studied the problem of a mobile impurity immersed in a bosonic mixture. We focused on the experimental relevant case of a G. Bighin et al. |

Atom interferometry with trapped samples offers the advantage of long interrogation times in compact setups, measuring forces and local fields with spatial resolution of a few micrometers. Here, we experimentally demonstrate a multimode interferometer comprising a Bose-Einstein condensate of L. Masi et al. |

We have experimentally and theoretically studied how the interactions affect the interference pattern of two expanding A. Burchianti et al. |

We show that the Lee-Huang-Yang (LHY) energy functional for a heteronuclear Bose mixture can be accurately approximated by an expression that has the same functional form as in the homonuclear case. It is characterized by two exponents, which can be treated as fitting parameters. We demonstrate that the values of these parameters which preserve the invariance under permutation of the two atomic species are exactly those of the homonuclear case. Deviations from the actual expression of LHY energy functional are discussed quantitatively. F. Minardi et al. |

We report on the formation of heteronuclear quantum droplets in an attractive bosonic mixture of 41K and 87Rb. We observe long-lived self-bound states, both in free space and in an optical waveguide. In the latter case, the dynamics under the effect of a species-dependent force confirms their bound nature. By tuning the interactions from the weakly to the strongly attractive regime, we study the transition from expanding to localized states, in both geometries. We compare the experimental results with numerical simulations and we find a good agreement in the full range of explored interactions. C. D'Errico et al. |

We report on the production of a A. Burchianti, et al. Phys. Rev. A 98, 063616 (2018) |

We have realized a double-species Bose-Einstein Condensate of |

Laser cooling based on dark states, i.e. states decoupled from light, has proven to be effective to increase the phasespace density of cold trapped atoms. Dark-states cooling requires open atomic transitions, in contrast to the ordinary laser cooling used for example in magneto-optical traps (MOTs), which operate on closed atomic transitions. For alkali atoms, dark-states cooling is therefore commonly operated on the D1 transition nS S. Rosi, et al. Sci. Rep. 8, 1301 (2018) |

We achieved a |

We assembled a new vacuum system: a single 2D MOT for both the |

In an array of one-dimensional traps, we create impurities of K atoms immersed in reservoir of Rb atoms. The impurities are first localized by an external species-selective potential and then suddenly freed: their subsequent dynamics exhibits "breathing" oscillations, due to a weaker confining potential. We find that the amplitude of these oscillations is reduced when increasing the strength of the impurity-reservoir interaction, irrespective of its sign. We interpret our data with a polaric mass shift model derived following Feynman variational approach. J. Catani et al. |