J. Mompart
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View article: Ultracold atoms carrying orbital angular momentum: Engineering topological phases in lattices
Ultracold atoms carrying orbital angular momentum: Engineering topological phases in lattices Open
Ultracold atoms carrying Orbital Angular Momentum (OAM) loaded in lattices constitute a promising platform for engineering topological systems either at the single-particle limit or in the presence of interactions. In this review, we repor…
View article: Trapping of Bose-Einstein condensates in a three-dimensional dark focus generated by conical refraction
Trapping of Bose-Einstein condensates in a three-dimensional dark focus generated by conical refraction Open
We present an efficient three-dimensional dark-focus optical trapping\npotential for neutral atoms and Bose-Einstein condensates. This "optical\nbottle" is created by a single blue-detuned light field exploiting the\nphenomenon of conical …
View article: Bosonic orbital Su-Schrieffer-Heeger model in a lattice of rings
Bosonic orbital Su-Schrieffer-Heeger model in a lattice of rings Open
We study the topological properties of interacting and non-interacting bosons loaded in the orbital angular momentum states $l=1$ in a lattice of rings with alternating distances. At the single-particle level, the two circulation states wi…
View article: Mode pumping in photonic lattices using a single tailored auxiliary waveguide
Mode pumping in photonic lattices using a single tailored auxiliary waveguide Open
In this work, we propose a completely general method to pump the gapped\ntopological modes of a lattice of optical waveguides by controlling the\npropagation constant of an auxiliary waveguide and its coupling to the main\nlattice. In this…
View article: Quantum-jump analysis of frequency up-conversion amplification without inversion in a four-level scheme
Quantum-jump analysis of frequency up-conversion amplification without inversion in a four-level scheme Open
In this work, we use the quantum-jump approach to study light-matter\ninteractions in a four-level scheme giving rise to frequency up-conversion\namplification without inversion (AWI). The results obtained apply to the case\nof neutral Hg …
View article: Mode pumping in photonic lattices using a single tailored auxiliary waveguide
Mode pumping in photonic lattices using a single tailored auxiliary waveguide Open
In this work, we propose a completely general method to pump the gapped topological modes of a lattice of optical waveguides by controlling the propagation constant of an auxiliary waveguide and its coupling to the main lattice. In this wa…
View article: Local Hilbert space fragmentation and weak thermalization in Bose-Hubbard diamond necklaces
Local Hilbert space fragmentation and weak thermalization in Bose-Hubbard diamond necklaces Open
We study Bose-Hubbard models in a family of diamond necklace lattices with $n$ central sites. The single-particle spectrum of these models presents compact localized states (CLSs) that occupy the up and down sites of each diamond. By perfo…
View article: Many-body Aharonov-Bohm caging in a lattice of rings
Many-body Aharonov-Bohm caging in a lattice of rings Open
We study a system of a few ultracold bosons loaded into the states with orbital angular momentum $l=1$ of a one-dimensional staggered lattice of rings. Local eigenstates with winding numbers $+l$ and $-l$ form a Creutz ladder with a real d…
View article: High-efficiency topological pumping with discrete supersymmetry transformations
High-efficiency topological pumping with discrete supersymmetry transformations Open
Making use of the isospectrality of Supersymmetry transformations, we propose a general and high-fidelity method to prepare gapped topological modes in discrete systems from a single-site excitation. The method consists of adiabatically co…
View article: Spatially strongly confined atomic excitation via a two dimensional stimulated Raman adiabatic passage
Spatially strongly confined atomic excitation via a two dimensional stimulated Raman adiabatic passage Open
We consider a method of sub-wavelength superlocalization and patterning of atomic matter waves via a two dimensional stimulated Raman adiabatic passage (2D STIRAP) process. An atom initially prepared in its ground level interacts with a do…
View article: Supersymmetry-enhanced stark-chirped rapid-adiabatic-passage in multimode optical waveguides
Supersymmetry-enhanced stark-chirped rapid-adiabatic-passage in multimode optical waveguides Open
We propose a method to efficiently pump an excited mode of a multimode optical waveguide starting from a fundamental-mode input by combining Stark-Chirped Rapid Adiabatic Passage (SCRAP) and Supersymmetry (SUSY) transformations. In a two-w…
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: Orbital angular momentum dynamics of Bose-Einstein condensates trapped in two stacked rings
Orbital angular momentum dynamics of Bose-Einstein condensates trapped in two stacked rings Open
We investigate the stability and dynamics of the orbital angular momentum modes of a repulsive Bose-Einstein condensate trapped in two tunnel-coupled rings in a stack configuration. Within mean-field theory, we derive a two-state model for…
View article: Coherent spin mixing via spin-orbit coupling in Bose gases
Coherent spin mixing via spin-orbit coupling in Bose gases Open
We study beyond-mean-field properties of interacting spin-1 Bose gases with\nsynthetic Rashba-Dresselhaus spin-orbit coupling at low energies. We derive a\nmany-body Hamiltonian following a tight-binding approximation in quasi-momentum\nsp…
View article: Quantum magnetism with ultracold bosons carrying orbital angular momentum
Quantum magnetism with ultracold bosons carrying orbital angular momentum Open
We show how strongly correlated ultracold bosonic atoms loaded in specific\norbital angular momentum states of arrays of cylindrically symmetric potentials\ncan realize a variety of spin-1/2 models of quantum magnetism. We consider\nexplic…
View article: Roadmap on STIRAP applications
Roadmap on STIRAP applications Open
STIRAP (stimulated Raman adiabatic passage) is a powerful laser-based method, usually involving two photons, for efficient and selective transfer of populations between quantum states. A particularly interesting feature is the fact that th…
View article: Overview of Bohmian Mechanics
Overview of Bohmian Mechanics Open
This chapter provides a fully comprehensive overview of the Bohmian formulation of quantum phenomena. It deals with a historical review of the difficulties found by Louis de Broglie, David Bohm and John Bell to convince the scientific comm…
View article: Topological edge states and Aharanov-Bohm caging with ultracold atoms carrying orbital angular momentum
Topological edge states and Aharanov-Bohm caging with ultracold atoms carrying orbital angular momentum Open
We show that bosonic atoms loaded into orbital angular momentum $l=1$ states\nof a lattice in a diamond-chain geometry provides a flexible and simple\nplatform for exploring a range of topological effects. This system exhibits\nrobust edge…
View article: Topological edge states with ultracold atoms carrying orbital angular momentum in a diamond chain
Topological edge states with ultracold atoms carrying orbital angular momentum in a diamond chain Open
We study the single-particle properties of a system formed by ultracold atoms\nloaded into the manifold of $l=1$ Orbital Angular Momentum (OAM) states of an\noptical lattice with a diamond chain geometry. Through a series of successive\nba…
View article: Integrated photonic devices based on adiabatic transitions between supersymmetric structures
Integrated photonic devices based on adiabatic transitions between supersymmetric structures Open
We introduce adiabatic transitions connecting two supersymmetric partner profiles by smoothly modifying the transverse refractive index profile along the propagation direction. With this transformation, one of the transverse electric modes…
View article: Atomic-frequency-comb quantum memory via piecewise adiabatic passage
Atomic-frequency-comb quantum memory via piecewise adiabatic passage Open
In this work, we propose a method to create an atomic frequency comb (AFC) in hot atomic vapors using the piecewise adiabatic passage (PAP) technique. Due to the Doppler effect, the trains of pulses used for PAP give rise to a velocity-dep…
View article: Quantum sensing using imbalanced counter-rotating Bose–Einstein condensate modes
Quantum sensing using imbalanced counter-rotating Bose–Einstein condensate modes Open
A quantum device for measuring two-body interactions, scalar magnetic fields and rotations is proposed using a Bose–Einstein condensate (BEC) in a ring trap. We consider an imbalanced superposition of orbital angular momentum modes with op…
View article: Continuous supersymmetric transformations in optical waveguides
Continuous supersymmetric transformations in optical waveguides Open
We introduce continuous supersymmetric transformations to manipulate the modal content in systems of optical waveguides, providing a systematic method to design efficient and robust integrated devices such as tapered waveguides, single-wav…
View article: Mode-division (de)multiplexing using adiabatic passage and supersymmetric waveguides
Mode-division (de)multiplexing using adiabatic passage and supersymmetric waveguides Open
The development of mode-division multiplexing techniques is an important step to increase the information processing capacity. In this context, we design an efficient and robust mode-division (de)multiplexing integrated device based on the…
View article: Single-atom edgelike states via quantum interference
Single-atom edgelike states via quantum interference Open
We demonstrate how quantum interference may lead to the appearance of robust\nedge-like states of a single ultracold atom in a two-dimensional optical\nribbon. We show that these states can be engineered either within the manifold\nof loca…
View article: Optimal conditions for spatial adiabatic passage of a Bose-Einstein condensate
Optimal conditions for spatial adiabatic passage of a Bose-Einstein condensate Open
We investigate spatial adiabatic passage of a Bose-Einstein condensate in a\ntriple well potential within the three-mode approximation. By rewriting the\ndynamics in the so-called time-dependent dark/dressed basis, we analytically\nderive …
View article: Engineering of orbital angular momentum supermodes in coupled optical waveguides
Engineering of orbital angular momentum supermodes in coupled optical waveguides Open
In this work we demonstrate the existence of orbital angular momentum (OAM) bright and dark supermodes in a three-evanescently coupled cylindrical waveguides system. Bright and dark supermodes are characterized by their coupling and decoup…
View article: Conical refraction: fundamentals and applications
Conical refraction: fundamentals and applications Open
In 1832 Hamilton predicted that a collimated light beam propagating through a biaxial crystal parallel to one of its optical axes refracts as a slanted cone within the crystal and emerges as a hollow light cylinder, this optical effect bei…