Zobrazeno 1 - 10
of 331
pro vyhledávání: '"Roati, G"'
Autor:
Hernandez-Rajkov, D., Grani, N., Scazza, F., Del Pace, G., Kwon, W. J., Inguscio, M., Xhani, K., Fort, C., Modugno, M., Marino, F., Roati, G.
Publikováno v:
Nature Physics (2024)
At the interface between two fluid layers in relative motion, infinitesimal fluctuations can be exponentially amplified, inducing vorticity and the breakdown of the laminar flow. This process, known as the Kelvin-Helmholtz instability, is responsible
Externí odkaz:
http://arxiv.org/abs/2303.12631
Autor:
Del Pace, G., Xhani, K., Falconi, A. Muzi, Fedrizzi, M., Grani, N., Rajkov, D. Hernandez, Inguscio, M., Scazza, F., Kwon, W. J., Roati, G.
Publikováno v:
Phys. Rev. X 12, 041037 (2022)
Persistent currents in annular geometries have played an important role in disclosing the quantum phase coherence of superconductors and mesoscopic electronic systems. Ultracold atomic gases in multiply connected traps also exhibit long-lived supercu
Externí odkaz:
http://arxiv.org/abs/2204.06542
Autor:
García-Orozco, A. D., Madeira, L., Moreno-Armijos, M. A., Fritsch, A. R., Tavares, P. E. S., Castilho, P. C. M., Cidrim, A., Roati, G., Bagnato, V. S.
Publikováno v:
Phys. Rev. A 106, 023314 (2022)
We study the emergence of universal scaling in the time-evolving momentum distribution of a harmonically trapped three-dimensional Bose-Einstein condensate, parametrically driven to a turbulent state. We demonstrate that the out-of-equilibrium dynami
Externí odkaz:
http://arxiv.org/abs/2107.07421
Autor:
Kwon, W. J., Del Pace, G., Xhani, K., Galantucci, L., Falconi, A. Muzi, Inguscio, M., Scazza, F., Roati, G.
Publikováno v:
Nature 600, 64-69 (2021)
In quantum fluids, the quantisation of circulation forbids the diffusion of a vortex swirling flow seen in classical viscous fluids. Yet, a quantum vortex accelerating in a superfluid may lose its energy into acoustic radiation, in a similar way an e
Externí odkaz:
http://arxiv.org/abs/2105.15180
We design and implement an efficient high-current radio-frequency (RF) circuit, enabling fast and coherent coupling between magnetic levels in cold alkali atomic samples. It is based on a compact shape-optimized coil that maximizes the RF field coupl
Externí odkaz:
http://arxiv.org/abs/2104.12730
Publikováno v:
Phys. Rev. Lett. 126, 055301 (2021)
We investigate the transport of a Fermi gas with unitarity-limited interactions across the superfluid phase transition, probing its response to a direct current (dc) drive through a tunnel junction. As the superfluid critical temperature is crossed f
Externí odkaz:
http://arxiv.org/abs/2010.00582
Autor:
Hernández-Rajkov, D., Padilla-Castillo, J. E., Mendoza-López, M., Colín-Rodríguez, R., Gutiérrez-Valdés, A., Morales-Ramírez, S. A., Gutiérrez-Arenas, R. A., Gardea-Flores, C. A., Roati, G., Jáuregui-Renaud, R., Poveda-Cuevas, F. J., Seman, J. A.
Publikováno v:
Revista Mexicana de F\'isica 66, 388 (2020)
We present our experimental setup to produce ultracold strongly correlated fermionic superfluids made of a two-component spin-mixture of $^6$Li atoms. Employing standard cooling techniques, we achieve quantum degeneracy in a single-beam optical dipol
Externí odkaz:
http://arxiv.org/abs/2008.05046
We provide a complete study of the phase diagram characterising the distinct dynamical regimes emerging in a three-dimensional Josephson junction in an ultracold quantum gas. Considering trapped ultracold superfluids separated into two reservoirs by
Externí odkaz:
http://arxiv.org/abs/2007.13102
Autor:
Scazza, F., Valtolina, G., Amico, A., Tavares, P. E. S., Inguscio, M., Ketterle, W., Roati, G., Zaccanti, M.
Publikováno v:
Phys. Rev. A 101, 013603 (2020)
Recent experiments have revitalized the interest in a Fermi gas of ultracold atoms with strong repulsive interactions. In spite of its seeming simplicity, this system exhibits a complex behavior, resulting from the competing action of two distinct in
Externí odkaz:
http://arxiv.org/abs/1910.14279
Autor:
Kwon, W. J., Del Pace, G., Panza, R., Inguscio, M., Zwerger, W., Zaccanti, M., Scazza, F., Roati, G.
Publikováno v:
Science 369, 84-88 (2020)
The dc Josephson effect provides a powerful phase-sensitive tool for investigating superfluid order parameters. We report on the observation of dc Josephson supercurrents in strongly interacting fermionic superfluids across a tunnelling barrier in th
Externí odkaz:
http://arxiv.org/abs/1908.09696