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View article: Anomalous Doppler Effect in Superfluid and Supersolid Atomic Gases
Anomalous Doppler Effect in Superfluid and Supersolid Atomic Gases Open
By employing the formalism of hydrodynamics, we derive novel analytic predictions for the Doppler effect in superfluids with broken Galilean invariance and hosting persistent currents at zero temperature. We consider two scenarios: when Ga…
View article: Superfluidity and sound propagation in disordered Bose gases
Superfluidity and sound propagation in disordered Bose gases Open
Superfluidity describes the ability of quantum matter to flow without friction. Due to its fundamental role in many transport phenomena, it is crucial to understand the robustness of superfluid properties to external perturbations. Here, w…
View article: Characterization of cases and analysis of First-instance Judgments in Ethical Proceedings at the Regional Council of Veterinary Medicine of the State of São Paulo
Characterization of cases and analysis of First-instance Judgments in Ethical Proceedings at the Regional Council of Veterinary Medicine of the State of São Paulo Open
In Brazil, veterinary medicine is regulated by a resolution that sets out the Code of Ethics of the Veterinary Medical Profession, established by the Federal Council, which has national jurisdiction and compliance with which is monitored b…
View article: Superfluidity and sound propagation in disordered Bose gases
Superfluidity and sound propagation in disordered Bose gases Open
Superfluidity describes the ability of quantum matter to flow without friction. Due to its fundamental role in many transport phenomena, it is crucial to understand the robustness of superfluid properties to external perturbations. Here, w…
View article: Superfluid Fraction and Leggett Bound in a Density Modulated Strongly Interacting Fermi Gas at Zero Temperature
Superfluid Fraction and Leggett Bound in a Density Modulated Strongly Interacting Fermi Gas at Zero Temperature Open
We calculate the superfluid fraction of an interacting Fermi gas, in the presence of a one-dimensional periodic potential of strength $V_0$ and wave-vector $q$. Special focus is given to the unitary Fermi gas, characterized by the divergen…
View article: Scissors modes of a Bose-Einstein condensate in a synthetic magnetic field
Scissors modes of a Bose-Einstein condensate in a synthetic magnetic field Open
We study the scissors modes of a harmonically trapped Bose-Einstein condensate under the influence of a synthetic magnetic field, which induces rigid rotational components in the velocity field. Our investigation reveals that the scissors …
View article: Scissors Modes of a Bose-Einstein Condensate in a Synthetic Magnetic Field
Scissors Modes of a Bose-Einstein Condensate in a Synthetic Magnetic Field Open
We study the scissors modes of a harmonically trapped Bose-Einstein condensate under the influence of a synthetic magnetic field, which induces rigid rotational components in the velocity field. Our investigation reveals that the scissors …
View article: Sound, superfluidity and layer compressibility in a ring dipolar supersolid
Sound, superfluidity and layer compressibility in a ring dipolar supersolid Open
We propose a protocol to excite the Goldstone modes of a supersolid dipolar Bose-Einstein condensed gas confined in a ring geometry. By abruptly removing an applied periodic modulation proportional to cos($φ$), where $φ$ is the azimuthal a…
View article: Superfluid Fraction in an Interacting Spatially Modulated Bose-Einstein Condensate
Superfluid Fraction in an Interacting Spatially Modulated Bose-Einstein Condensate Open
At zero temperature, a Galilean-invariant Bose fluid is expected to be fully superfluid. Here we investigate theoretically and experimentally the quenching of the superfluid density of a dilute Bose-Einstein condensate due to the breaking …
View article: Lev Petrovich Pitaevskii
Lev Petrovich Pitaevskii Open
The extraordinary theoretical physicist Lev Petrovich Pitaevskii died on 23 August 2022 in Rovereto, Italy, from the consequences of a fall, compounded by age-related health issues. He was known across the physics community for his encyclo…
View article: Superfluid fraction in an interacting spatially modulated Bose-Einstein condensate
Superfluid fraction in an interacting spatially modulated Bose-Einstein condensate Open
At zero temperature, a Galilean-invariant Bose fluid is expected to be fully superfluid. Here we investigate theoretically and experimentally the quenching of the superfluid density of a dilute Bose-Einstein condensate due to the breaking …
View article: The cross-over from Townes solitons to droplets in a 2D Bose mixture
The cross-over from Townes solitons to droplets in a 2D Bose mixture Open
When two Bose–Einstein condensates—labelled 1 and 2—overlap spatially, the equilibrium state of the system depends on the miscibility criterion for the two fluids. Here, we theoretically focus on the non-miscible regime in two spatial dime…
View article: Dynamics of Stripe Patterns in Supersolid Spin-Orbit-Coupled Bose Gases
Dynamics of Stripe Patterns in Supersolid Spin-Orbit-Coupled Bose Gases Open
Despite ground-breaking observations of supersolidity in spin-orbit-coupled Bose-Einstein condensates, until now the dynamics of the emerging spatially periodic density modulations has been vastly unexplored. Here, we demonstrate the nonri…
View article: The cross-over from Townes solitons to droplets in a 2D Bose mixture
The cross-over from Townes solitons to droplets in a 2D Bose mixture Open
When two Bose-Einstein condensates -- labelled 1 and 2 -- overlap spatially, the equilibrium state of the system depends on the miscibility criterion for the two fluids. Here, we theoretically focus on the non-miscible regime in two spatia…
View article: Creation and robustness of quantized vortices in a dipolar supersolid when crossing the superfluid-to-supersolid transition
Creation and robustness of quantized vortices in a dipolar supersolid when crossing the superfluid-to-supersolid transition Open
Experiments on dipolar Bose-Einstein condensates have recently reported the observation of supersolidity. Although quantized vortices constitute a key probe of superfluidity, their observability in dipolar supersolids is largely prevented …
View article: Repulsive Fermi and Bose Polarons in Quantum Gases
Repulsive Fermi and Bose Polarons in Quantum Gases Open
Polaron quasiparticles are formed when a mobile impurity is coupled to the elementary excitations of a many-particle background. In the field of ultracold atoms, the study of the associated impurity problem has attracted a growing interest…
View article: Coherently Coupled Mixtures of Ultracold Atomic Gases
Coherently Coupled Mixtures of Ultracold Atomic Gases Open
This article summarizes some of the relevant features exhibited by binary mixtures of Bose–Einstein condensates in the presence of coherent coupling at zero temperature. The coupling, which is experimentally produced by proper photon trans…
View article: Moment of inertia and dynamical rotational response of a supersolid dipolar gas
Moment of inertia and dynamical rotational response of a supersolid dipolar gas Open
We show that the knowledge of the time dependent response of a trapped gas,\nsubject to a sudden rotation of a confining harmonic potential, allows for the\ndetermination of the moment of inertia of dipolar supersolid configurations.\nWhil…
View article: Supersolid edge and bulk phases of a dipolar quantum gas in a box
Supersolid edge and bulk phases of a dipolar quantum gas in a box Open
We investigate the novel density distributions acquired by a dipolar\nBose-Einstein condensed gas confined in a box potential, with special focus on\nthe effects of supersolidity. Differently from the case of harmonic trapping,\nthe ground…
View article: Supersolid phase of a spin-orbit-coupled Bose-Einstein condensate: A perturbation approach
Supersolid phase of a spin-orbit-coupled Bose-Einstein condensate: A perturbation approach Open
The phase diagram of a Bose-Einstein condensate with Raman-induced spin-orbit coupling includes a stripe phase with supersolid features. In this work we develop a perturbation approach to study the ground state and the Bogoliubov modes of …
View article: Supersolid phase of a spin-orbit-coupled Bose-Einstein condensate: A perturbation approach
Supersolid phase of a spin-orbit-coupled Bose-Einstein condensate: A perturbation approach Open
The phase diagram of a Bose-Einstein condensate with Raman-induced spin-orbit coupling includes a stripe phase with supersolid features. In this work we develop a perturbation approach to study the ground state and the Bogoliubov modes of …
View article: Exciting the Goldstone Modes of a Supersolid Spin-Orbit-Coupled Bose Gas
Exciting the Goldstone Modes of a Supersolid Spin-Orbit-Coupled Bose Gas Open
Supersolidity is deeply connected with the emergence of Goldstone modes, reflecting the spontaneous breaking of both phase and translational symmetry. Here, we propose accessible signatures of these modes in harmonically trapped spin-orbit…
View article: Report on 2107.06425v1
Report on 2107.06425v1 Open
The phase diagram of a Bose-Einstein condensate with Raman-induced spin-orbit coupling includes a stripe phase with supersolid features.In this work we develop a perturbation approach to study the ground state and the Bogoliubov modes of t…
View article: Roadmap on Atomtronics: State of the art and perspective
Roadmap on Atomtronics: State of the art and perspective Open
Atomtronics deals with matter-wave circuits of ultracold atoms manipulated through magnetic or laser-generated guides with different shapes and intensities. In this way, new types of quantum networks can be constructed in which coherent fl…
View article: Coherently Coupled Mixtures of Bose-Einstein Condensed Gases
Coherently Coupled Mixtures of Bose-Einstein Condensed Gases Open
This paper summarizes some of the relevant features exhibited by bi-nary mixtures of Bose-Einstein condensates in the presence of coherent coupling at zero temperature. The coupling, which is experimentally produced by proper photon transi…
View article: Spin drag and fast response in a quantum mixture of atomic gases
Spin drag and fast response in a quantum mixture of atomic gases Open
By applying a sudden perturbation to one of the components of a mixture of
\ntwo quantum fluids, we explore the effect on the motion of the second component
\non a short time scale. By implementing perturbation theory, we prove that for
\n…
View article: Measurement of the Canonical Equation of State of a Weakly Interacting 3D Bose Gas
Measurement of the Canonical Equation of State of a Weakly Interacting 3D Bose Gas Open
Using a multiple-image reconstruction method applied to a harmonically trapped Bose gas, we determine the equation of state of uniform matter across the critical transition point, within the local density approximation. Our experimental re…
View article: Quantized vortices in dipolar supersolid Bose-Einstein-condensed gases
Quantized vortices in dipolar supersolid Bose-Einstein-condensed gases Open
We investigate the properties of quantized vortices in a dipolar\nBose-Einstein condensed gas by means of a generalised Gross-Pitaevskii\nequation. The size of the vortex core hugely increases by increasing the weight\nof the dipolar inter…