Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Andrea Richaud"'
Publikováno v:
Physical Review Research, Vol 6, Iss 4, p 043197 (2024)
We study the mass exchange between two rotating, quantum massive vortices in a two-component Bose-Einstein condensate. The vortices, in the majority component, exhibit a filled core, where the in-filling minority component undergoes a quantum tunneli
Externí odkaz:
https://doaj.org/article/a4ba4944a80c4068a1601984e3b9e1e6
Publikováno v:
Physical Review Research, Vol 5, Iss 2, p 023109 (2023)
Ghost vortices constitute an elusive class of topological excitations in quantum fluids since the relevant phase singularities fall within regions where the superfluid density is almost zero. Here we present a platform that allows for the controlled
Externí odkaz:
https://doaj.org/article/1bf804a842c743b5912e3fb88bda7ce2
Publikováno v:
Condensed Matter, Vol 7, Iss 1, p 18 (2022)
The physics of many interesting correlated materials can be captured by multiorbital Hubbard models, where conduction electrons feature an additional orbital degree of freedom. The multiorbital characteristic is not a mere complication, but it leads
Externí odkaz:
https://doaj.org/article/6c60bf7082494693bcac711d48359a66
Publikováno v:
Entropy, Vol 23, Iss 7, p 821 (2021)
We investigated the spatial phase separation of the two components forming a bosonic mixture distributed in a four-well lattice with a ring geometry. We studied the ground state of this system, described by means of a binary Bose–Hubbard Hamiltonia
Externí odkaz:
https://doaj.org/article/7b6dadf9e55045afbcc40a45106e740d
Autor:
Andrea Richaud, Vittorio Penna
Publikováno v:
Condensed Matter, Vol 5, Iss 1, p 2 (2020)
We investigate a notable class of states peculiar to a bosonic binary mixture featuring repulsive intraspecies and attractive interspecies couplings. We evidence that, for small values of the hopping amplitudes, one can access particular regimes mark
Externí odkaz:
https://doaj.org/article/9948819bef214a129933309508336d54
Autor:
Andrea Richaud, Vittorio Penna
Publikováno v:
New Journal of Physics, Vol 20, Iss 10, p 105008 (2018)
We investigate several dynamical regimes characterizing a bosonic binary mixture loaded in a ring trimer, with particular reference to the persistence of demixing. The degree of phase separation is evaluated by means of the ‘entropy of mixing’, a
Externí odkaz:
https://doaj.org/article/c720da2c3616409eb91fd3510efcdd86
Publikováno v:
Entropy, Vol 20, Iss 2, p 84 (2018)
Motivated by the importance of entanglement and correlation indicators in the analysis of quantum systems, we study the equilibrium and the bipartite residual entropy in a two-species Bose–Hubbard dimer when the spatial phase separation of the two
Externí odkaz:
https://doaj.org/article/f4d3e422c7b24514b3d6032e9add360c
We consider the dynamical properties of quantum vortices with filled massive cores, hence the term “massive vortices”. While the motion of massless vortices is described by first-order motion equations, the inclusion of core mass introduces a sec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f17fae96ab7f675cc50557bf0b8ec47d
https://hdl.handle.net/11583/2978783
https://hdl.handle.net/11583/2978783
We study the motion of a superfluid vortex in condensates having different background density profiles, ranging from parabolic to uniform. The resulting effective point-vortex model for a generic power-law potential $\propto r^k$ can be experimentall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42b95b40e7fc3ff861809cffd15c3a50
https://hdl.handle.net/2117/381672
https://hdl.handle.net/2117/381672
Quantum vortices are often endowed with an effective inertial mass, due, for example, to massive particles in their cores. Such "massive vortices" display new phenomena beyond the standard picture of superfluid vortex dynamics, where the mass is negl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4b8de6920f4d410be8d1418c02f8342
http://arxiv.org/abs/2209.00493
http://arxiv.org/abs/2209.00493