53 citations · 264 across the 20 of their papers we have counts for
20 papers
Universality in strongly interacting bosonic clusters
L. Madeira, F. Pederiva, U. van Kolck
We develop an effective field theory (EFT) for strongly interacting bosonic clusters, using He as a paradigmatic example of universality in systems with large scattering length…
Spectroscopy of collective modes in a Bose-Einstein condensate: From single to double excitation periods
Leandro A. Machado, Lucas Madeira, Mônica A. Caracanhas +1
Collective modes are coherent excitations in Bose-Einstein condensates (BECs), and their study provides insight into the macroscopic quantum phenomena that govern these systems. Co…
The role of the effective range in strongly-interacting few-body systems
Lucas Madeira
Strongly interacting systems appear in several areas of physics and are characterized by attractive interactions that can almost, or just barely, loosely bind two particles. Althou…
Scattering length and effective range of microscopic two-body potentials
Mathias Macêdo-Lima, Lucas Madeira
Scattering processes are a fundamental way of experimentally probing distributions and properties of systems in several areas of physics. Considering two-body scattering at low ene…
Superfluid excitations in rotating two-dimensional ring traps
Guilherme Tomishiyo, Lucas Madeira, Mônica A. Caracanhas
We studied a rotating Bose-Einstein condensate confined in ring trap configurations that can be produced starting with a bubble trap confinement, approximated by a Mexican hat and…
Non-Thermal Fixed Points in Bose Gas Experiments
Lucas Madeira, Vanderlei S. Bagnato
One of the most challenging tasks in physics has been understanding the route an out-of-equilibrium system takes to its thermalized state. This problem can be particularly overwhel…
Universal dynamics of a turbulent superfluid Bose gas
A. D. García-Orozco, L. Madeira, M. A. Moreno-Armijos +6
We study the emergence of universal scaling in the time-evolving momentum distribution of a harmonically trapped three-dimensional Bose-Einstein condensate, parametrically driven t…
Quantum Monte Carlo studies of a trimer scaling function with microscopic two- and three-body interactions
Lucas Madeira, Tobias Frederico, Stefano Gandolfi +2
We present an energy scaling function to predict, in a specific range, the energy of bosonic trimers with large scattering lengths and finite range interactions, which is validated…
Cold atoms beyond atomic physics
Lucas Madeira, Vanderlei S. Bagnato
In the last 25 years, much progress has been made producing and controlling Bose-Einstein condensates (BECs) and degenerate Fermi gases. The advances in trapping, cooling and tunin…
Entropy of a Turbulent Bose-Einstein Condensate
Lucas Madeira, Arnol D. García-Orozco, F. E. A. dos Santos +1
Quantum turbulence deals with the phenomenon of turbulence in quantum fluids, such as superfluid helium and trapped Bose-Einstein condensates (BECs). Although much progress has bee…
Quantum turbulence in Bose-Einstein condensates: present status and new challenges ahead
L. Madeira, A. Cidrim, M. Hemmerling +3
The field of quantum turbulence is related to the manifestation of turbulence in quantum fluids, such as liquid helium and ultracold gases. The concept of turbulence in quantum sys…
Momentum distribution of Vinen turbulence in trapped atomic Bose-Einstein condensates
Áttis V. M. Marino, Lucas Madeira, André Cidrim +2
The decay of multicharged vortices in trapped Bose-Einstein condensates may lead to a disordered vortex state consistent with the Vinen regime of turbulence, characterized by an ab…
Intra-scales energy transfer during the evolution of turbulence in a trapped Bose-Einstein condensate
Arnol Daniel García-Orozco, Lucas Madeira, Luca Galantucci +2
In turbulence phenomena, including the quantum turbulence in superfluids, an energy flux flows from large to small length scales, composing a cascade of energy. A universal charact…
Quantum turbulence in quantum gases
L. Madeira, M. A. Caracanhas, F. E. A. dos Santos +1
Turbulence is characterized by a large number of degrees of freedom, distributed over several length scales, that result into a disordered state of a fluid. The field of quantum tu…
Bose-Einstein condensation in spherically symmetric traps
Sálvio Jacob Bereta, Lucas Madeira, Mônica A. Caracanhas +1
We present a pedagogical introduction to Bose-Einstein condensation in traps with spherical symmetry, namely the spherical box and the thick shell, sometimes called bubble trap. In…
Vortices in low-density neutron matter and cold Fermi gases
Lucas Madeira, Stefano Gandolfi, Kevin E. Schmidt +1
Cold gas experiments can be tuned to achieve strongly-interacting regimes such as that of low-density neutron matter found in neutron-stars' crusts. We report =0 diffusion Monte…
Quantum Monte Carlo formalism for dynamical pions and nucleons
Lucas Madeira, Alessandro Lovato, Francesco Pederiva +1
In most simulations of nonrelativistic nuclear systems, the wave functions found solving the many-body Schrödinger equations describe the quantum-mechanical amplitudes of the nucle…
Core structure of two-dimensional Fermi gas vortices in the BEC-BCS crossover region
Lucas Madeira, Stefano Gandolfi, Kevin E. Schmidt
We report diffusion Monte Carlo results for the ground-state and vortex excitation of unpolarized spin-1/2 fermions in a two-dimensional disk. We investigate how vortex core…
Properties of heavy rare-gases adlayers on graphene substrates
Lucas Madeira, Silvio A. Vitiello
We investigated properties of heavy rare-gases, Ne, Ar, Kr, Xe and Rn, adsorbed on graphene substrates using molecular dynamics. We gathered evidences of commensurate solids for Ne…
Vortex line in the unitary Fermi gas
Lucas Madeira, Silvio A. Vitiello, Stefano Gandolfi +1
We report diffusion Monte Carlo results for the ground state of unpolarized spin-1/2 fermions in a cylindrical container and properties of the system with a vortex-line excitation.…