J. Boronat
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View article: Empty and filled vortices in squeezed <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mi mathvariant="normal">K</mml:mi> <mml:mprescripts/> <mml:none/> <mml:mn>39</mml:mn> </mml:mmultiscripts> </mml:math> Bose-Bose liquid drops
Empty and filled vortices in squeezed Bose-Bose liquid drops Open
Using density functional theory, we have theoretically studied the formation and the stability of vortices in quantum liquid droplets composed of a mixture of hyperfine states of potassium. Following the experimental setup that produced qu…
View article: Polarons and dimerons in the two-dimensional attractive Hubbard model
Polarons and dimerons in the two-dimensional attractive Hubbard model Open
A two-dimensional (2D) spin-up ideal Fermi gas interacting attractively with a spin-down impurity in the continuum undergoes, at zero temperature, a first-order phase transition from a polaron to a dimeron state. Here, we study a similar s…
View article: Thermal behavior of Bose-Einstein condensates of polar molecules
Thermal behavior of Bose-Einstein condensates of polar molecules Open
We use the finite-temperature extended Gross-Pitaevskii equation (TeGPE) to study a condensate of dipolar NaCs molecules under the conditions of the recent breakthrough experiment [Bigagli , ]. We report the condensate fraction of the syst…
View article: Creating and melting a supersolid by heating a quantum dipolar system
Creating and melting a supersolid by heating a quantum dipolar system Open
Recent experiments have shown that rising the temperature of a dipolar gas under certain conditions leads to a transition to a supersolid state. Here, we employ the path integral Monte Carlo method, which exactly accounts for both thermal …
View article: The Bose polaron as thermometer of a trapped Bose gas: a quantum Monte Carlo study
The Bose polaron as thermometer of a trapped Bose gas: a quantum Monte Carlo study Open
Quantum impurities interacting with quantum environments offer unique insights into many-body systems. Here, we explore the thermometric potential of a neutral impurity immersed in a harmonically trapped bosonic quantum gas below the Bose-…
View article: Interaction effects on the itinerant ferromagnetism phase transition
Interaction effects on the itinerant ferromagnetism phase transition Open
Itinerant ferromagnetism is one of the most-studied quantum phase transitions, the transition point and the nature of this phase transition being widely discussed. In dilute Fermi liquids, this analysis has been carried out up to second or…
View article: Dipolar Droplets of Strongly Interacting Molecules
Dipolar Droplets of Strongly Interacting Molecules Open
We simulate a molecular Bose-Einstein condensate in the strongly dipolar regime, observing the existence of self-bound droplets, as well as their splitting into multiple droplets by confinement-induced frustration. Our quantum Monte Carlo …
View article: Equation of state of Bose gases beyond the universal regime
Equation of state of Bose gases beyond the universal regime Open
The equation of state of dilute Bose gases, in which the energy only depends on the s-wave scattering length, is rather unknown beyond the universal limit. We have carried out a set of diffusion Monte Carlo calculations up to gas parameter…
View article: Self-Assembled Chains and Solids of Dipolar Atoms in a Multilayer
Self-Assembled Chains and Solids of Dipolar Atoms in a Multilayer Open
We predict that ultracold bosonic dipolar gases, confined within a multilayer geometry, may undergo self-assembling processes, leading to the formation of chain gases and solids. These dipolar chains, with dipoles aligned across different …
View article: On polarons and dimerons in the two-dimensional attractive Hubbard model
On polarons and dimerons in the two-dimensional attractive Hubbard model Open
A two-dimensional spin-up ideal Fermi gas interacting attractively with a spin-down impurity in the continuum undergoes, at zero temperature, a first-order phase transition from a polaron to a dimeron state. Here we study a similar system …
View article: 3He adsorbed on molecular hydrogen surfaces
3He adsorbed on molecular hydrogen surfaces Open
Using a diffusion Monte Carlo technique, we calculated the phase diagram of 3He adsorbed on a first solid layer of a molecular hydrogen isotope (H2, HD, and D2) on top of graphite. The results are qualitatively similar in all cases: a two-…
View article: Beyond universality in repulsive SU(N) Fermi gases
Beyond universality in repulsive SU(N) Fermi gases Open
Itinerant ferromagnetism in dilute Fermi gases is predicted to emerge at values of the gas parameter where second-order perturbation theory is not accurate enough to properly describe the system. We have revisited perturbation theory for S…
View article: Ring solids and supersolids in spherical shell-shaped dipolar Bose-Einstein condensates
Ring solids and supersolids in spherical shell-shaped dipolar Bose-Einstein condensates Open
We study the interplay between the anisotropy of the dipole-dipole interaction and confinement in a curved geometry by means of the extended Gross-Pitaevskii equation, which allows us to characterize the ground state of a dipolar Bose gas …
View article: Equation of state of Bose gases beyond the universal regime
Equation of state of Bose gases beyond the universal regime Open
The equation of state of dilute Bose gases, in which the energy only depends on the $s$-wave scattering length, is rather unknown beyond the universal limit. We have carried out a bunch of diffusion Monte Carlo calculations up to gas param…
View article: Interaction effects on the itinerant ferromagnetism phase transition
Interaction effects on the itinerant ferromagnetism phase transition Open
Itinerant ferromagnetism is one of the most studied quantum phase transitions, the transition point and the nature of this phase transition being widely discussed. In dilute Fermi liquids, this analysis has been carried out up to second-or…
View article: 3He adsorbed on molecular hydrogen surfaces
3He adsorbed on molecular hydrogen surfaces Open
Using a diffusion Monte Carlo (DMC) technique, we calculated the phase diagram of 3He adsorbed on a first solid layer of a molecular hydrogen isotope (H2,HD and D2) on top of graphite. The results are qualitatively similar in all cases: a …
View article: Dipolar droplets of strongly interacting molecules
Dipolar droplets of strongly interacting molecules Open
We simulate a molecular Bose-Einstein condensate in the strongly dipolar regime, observing the existence of self-bound droplets, as well as their splitting into multiple droplets by confinement-induced frustration. Our quantum Monte Carlo …
View article: Temperature-induced miscibility of impurities in trapped Bose gases
Temperature-induced miscibility of impurities in trapped Bose gases Open
We study the thermal properties of impurities embedded in a repulsive Bose gas under a harmonic trapping potential. In order to obtain the exact structural properties in this inhomogeneous many-body system, we resort to the path-integral M…
View article: Self-Assembled Chains and Solids of Dipolar Atoms in a Multilayer
Self-Assembled Chains and Solids of Dipolar Atoms in a Multilayer Open
We predict that ultracold bosonic dipolar gases, confined within a multilayer geometry, may undergo self-assembling processes, leading to the formation of chain gases and solids. These dipolar chains, with dipoles aligned across different …
View article: Quantum-Monte-Carlo–based functional for dysprosium dipolar systems
Quantum-Monte-Carlo–based functional for dysprosium dipolar systems Open
We present a quantum-Monte-Carlo–based density functional to describe droplet formation and supersolidity in dipolar systems. The usual Lee-Huang-Yang term, accounting for quantum correlations in the conventional extended Gross-Pitaevskii …
View article: Temperature-induced miscibility of impurities in trapped Bose gases
Temperature-induced miscibility of impurities in trapped Bose gases Open
We study the thermal properties of impurities embedded in a repulsive Bose gas under a harmonic trapping potential. In order to obtain exact structural properties in this inhomogeneous many-body system, we resort to the path-integral Monte…
View article: Off-diagonal long-range order in arrays of dipolar droplets
Off-diagonal long-range order in arrays of dipolar droplets Open
We report quantum Monte Carlo results of harmonically confined quantum Bose dipoles within a range of interactions covering the evolution from a gas phase to the formation of an array of droplets. Scaling the experimental setup to a comput…
View article: Ring solids and supersolids in spherical shell-shaped dipolar Bose-Einstein condensates
Ring solids and supersolids in spherical shell-shaped dipolar Bose-Einstein condensates Open
We study the interplay between the anisotropy of the dipole-dipole interaction and confinement in a curved geometry by means of the extended Gross-Pitaevskii equation, which allows us to characterize the ground state of a dipolar Bose gas …
View article: Reply to "Comment on Absence of off-diagonal long-range order in hcp $^{\bf 4}$He dislocation cores"
Reply to "Comment on Absence of off-diagonal long-range order in hcp $^{\bf 4}$He dislocation cores" Open
We offer a Reply to Document arXiv:2303.12174 by M. Boninsegni et al., commenting on arXiv:2301.02854 .
View article: Squeezing Bose-Bose liquid drops
Squeezing Bose-Bose liquid drops Open
We explore ultradilute Bose-Bose liquid droplets squeezed by an external harmonic potential in one spatial direction. Our theoretical study is based on a functional that is built using quantum Monte Carlo results of the bulk phase and inco…
View article: A quantum Monte Carlo based density functional for Dysprosium dipolar system
A quantum Monte Carlo based density functional for Dysprosium dipolar system Open
We present a quantum Monte Carlo based density functional to describe droplet formation and supersolidity in dipolar systems. The usual Lee-Huang-Yang term, accounting for quantum correlations in the conventional extended Gross-Pitaievskii…
View article: Phases of 4He and H2 adsorbed on doped graphene
Phases of 4He and H2 adsorbed on doped graphene Open
The influence of attractive boron impurities, embedded on a graphene sheet, on the phase diagrams of $^4$He and H$_2$ adsorbed on top was studied using the diffusion Monte Carlo method. The doping of graphene was made by distributing the b…
View article: Phase separation in binary Bose mixtures at finite temperature
Phase separation in binary Bose mixtures at finite temperature Open
We investigate the magnetic behavior of finite-temperature repulsive two-component Bose mixtures by means of exact path-integral Monte-Carlo simulations. Novel algorithms are implemented for the free energy and the chemical potential of th…
View article: Off-diagonal long-range order in arrays of dipolar droplets
Off-diagonal long-range order in arrays of dipolar droplets Open
We report quantum Monte Carlo results of harmonically confined quantum Bose dipoles within a range of interactions covering the evolution from a gas phase to the formation of an array of droplets. Scaling the experimental setup to a comput…
View article: Thermally induced local imbalance in repulsive binary Bose mixtures
Thermally induced local imbalance in repulsive binary Bose mixtures Open
We study repulsive two-component Bose mixtures with equal populations and confined in a finite-size box through path-integral Monte Carlo simulations. For different values of the s-wave scattering length of the interspecies potential, we c…