A5063176198- Cold Atom Physics and Bose-Einstein Condensates
- Quantum many-body systems
- Topological Materials and Phenomena
- Quantum and electron transport phenomena
- Physics of Superconductivity and Magnetism
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Quantum, superfluid, helium dynamics
- Strong Light-Matter Interactions
- Theoretical and Computational Physics
- Quantum Mechanics and Applications
- Atomic and Subatomic Physics Research
- Quantum Electrodynamics and Casimir Effect
- Quantum Computing Algorithms and Architecture
- Advanced Materials and Mechanics
- Noncommutative and Quantum Gravity Theories
- Quantum Information and Cryptography
- Tribology and Lubrication Engineering
- Advanced Condensed Matter Physics
- Proteoglycans and glycosaminoglycans research
- Quantum Chromodynamics and Particle Interactions
- Stochastic processes and statistical mechanics
- Fractional Differential Equations Solutions
- Quantum Mechanics and Non-Hermitian Physics
- stochastic dynamics and bifurcation
Universitat Autònoma de Barcelona
2019-2024
Universität Innsbruck
2018-2022
Austrian Academy of Sciences
2018-2022
University of Pisa
2000-2022
Institute for Quantum Optics and Quantum Information Innsbruck
2020
Institute of Photonic Sciences
2011-2019
Universitat de Barcelona
2007-2011
KU Leuven
2005-2006
University of Milan
2003
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2002-2003
We describe a simple technique for generating cold-atom lattice pierced by uniform magnetic field. Our method is to extend one-dimensional optical into the "dimension" provided internal atomic degrees of freedom, yielding synthetic two-dimensional lattice. Suitable laser coupling between these states leads flux within show that this setup reproduces main features systems, such as fractal Hofstadter-butterfly spectrum and chiral edge associated Chern insulating phases.
Lattice gauge theories, which originated from particle physics in the context of Quantum Chromodynamics (QCD), provide an important intellectual stimulus to further develop quantum information technologies. While one long-term goal is reliable simulation currently intractable aspects QCD itself, lattice theories also play role condensed matter and science. In this way, both motivation a framework for interdisciplinary research towards development special purpose digital analog simulators,...
Time-periodic driving like lattice shaking offers a low-demanding method to generate artificial gauge fields in optical lattices. We identify the relevant symmetries that have be broken by function for purpose and demonstrate power of this making concrete proposals its application two-dimensional systems: show how tune frustration create control band touching points Dirac cones shaken kagome lattice. propose realization topological quantum spin Hall insulator spin-dependent hexagonal...
We present a general strategy to simulate D+1-dimensional quantum system using D-dimensional one. analyze in detail feasible implementation of our scheme optical lattice technology. The simplest nontrivial realization fourth dimension corresponds the creation bi-volume geometry. also propose single- and many-particle experimental signatures detect effects extra dimension.
Gauge theories establish the standard model of particle physics, and lattice gauge theory (LGT) calculations employing Markov Chain Monte Carlo (MCMC) methods have been pivotal in our understanding fundamental interactions. The present limitations MCMC techniques may be overcome by Hamiltonian-based simulations on classical or quantum devices, which further provide potential to address questions that lay beyond capabilities current approaches. However, for continuous groups, formulations...
We argue that the Fermi–Hubbard Hamiltonian describing physics of ultracold atoms on optical lattices in presence artificial non-Abelian gauge fields is exactly equivalent to theory Dirac fermions lattice. show it possible couple an 'artificial' gravitational field, i.e. consider a curved spacetime. identify special class spacetime metrics admit simple realization terms model subjected SU(2) corresponding position-dependent hopping matrices. As example, we discuss more detail 2+1D Rindler...
Gauge theories have applications in fundamental interactions and superconductivity. Researchers use tensor networks to describe gauge theories, avoiding some of the drawbacks Monte Carlo simulations.
We propose to simulate a Dirac field near an event horizon using ultracold atoms in optical lattice. Such quantum simulator allows for the observation of celebrated Unruh effect. Our proposal involves three stages: (1) preparation ground state massless 2D Minkowski spacetime; (2) quench lattice setup how accelerated observer would view that state; (3) measurement local fluctuation spectra by one-particle excitation spectroscopy order De Witt detector. According Unruh's prediction,...
We propose several designs to simulate quantum many-body systems in manifolds with a non-trivial topology. The key idea is create synthetic lattice combining real-space and internal degrees of freedom via suitable use induced hoppings. simplest example the conversion an open spin-ladder into closed spin-chain arbitrary boundary conditions. Further exploitation leads chains artificial tori Möbius strips different kinds. show that lattices Hubbard model on sharp scalable non-Euclidean...
Rotational misalignment or twisting of two monolayers graphene strongly influences its electronic properties. Structurally, leads to large periodic supercell structures, which in turn can support intriguing correlated behavior. Here, we propose a highly tunable scheme synthetically emulate twisted bilayer systems with ultracold atoms trapped an optical lattice. In our scheme, neither physical nor twist is directly realized. Instead, synthetic layers are produced exploiting coherently coupled...
Solving strongly coupled gauge theories in two or three spatial dimensions is of fundamental importance several areas physics ranging from high-energy to condensed matter. On a lattice, invariance and invariant (plaquette) interactions involve (at least) four-body that are challenging realize. Here we show Rydberg atoms configurable arrays realized current tweezer experiments the natural platform realize scalable simulators Rokhsar-Kivelson Hamiltonian --a 2D U(1) lattice theory describes...
Topological gauge theories provide powerful effective descriptions of certain strongly correlated systems, a prime example being the Chern-Simons theory fractional quantum Hall states. Engineering topological in controlled systems is both conceptual and practical importance, as it would access to with exotic excitations such anyons without need for strong correlations. Here, we discuss scheme engineer chiral BF theory, minimal model corresponding one-dimensional reduction ultracold atoms....
Ultracold atoms in a square flux ladder realize frustrated quantum $X\phantom{\rule{0}{0ex}}X$ model without the need for explicit geometric frustration. Instances of magnetism become readily accessible ultracold experiments.
Abstract The concept of synthetic dimensions works particularly well in atomic physics, quantum optics, and photonics, where the internal degrees freedom (Zeeman sublevels ground state, metastable excited states, or motional states for atoms, angular momentum transverse modes photons) provide space. In this Perspective article we report on recent progress studies dimensions, mostly, but not only, based research realized around Barcelona groups (ICFO, UAB), Donostia (DIPC), Poznan (UAM),...
We revisit and complete the study of curved BPS-domain walls in matter-coupled $5D$, $\mathcal{N}=2$ supergravity carefully analyze relation to gravitational theories known as ``fake supergravities.'' first show that require presence nontrivial hypermultiplet scalars, whereas are solely supported by vector multiplet scalars necessarily flat, due constraints from very special geometry. then recover fake effective description true where one restricts attention flowing scalar field a given...
Engineering topological quantum order has become a major field of physics. Many advances have been made by synthesizing gauge fields in cold atomic systems. Here we carry over these developments to other platforms which are extremely well suited for engineering, namely, trapped ions and nano-trapped atoms. Since systems typically one-dimensional, the action artificial magnetic so far received little attention. However, exploiting long-range nature interactions, loops with nonvanishing fluxes...
The Unruh effect is a quantum relativistic where the accelerated observer perceives vacuum as thermal state. Here we propose experimental realization of for interacting ultracold fermions in optical lattices by sudden quench resulting acceleration with varying interactions strengths real temperature background. We observe inversion statistics low lying excitations Wightman function result competition between spacetime and BCS Bogoliubov transformations. This paper opens up new perspectives...
As a novel platform for exploring exotic quantum phenomena, the moir\'e lattice has garnered significant interest in solid-state physics, photonics, and cold atom physics. While lattices two- three-dimensional systems have been proposed neutral atoms, simpler one-dimensional effect remains largely unexplored. We present scheme demonstrating effects atom-cavity coupling system, which resembles generalized open Dicke model exhibiting superradiant phase transitions. reveal strong link between...
We suggest a method for engineering quantum walk, with cold atoms as walkers, which presents topologically non-trivial properties. derive the phase diagram, and show that we are able to produce boundary between distinct phases using finite beam width of applied lasers. A protected bound state can then be observed, is pinned interface robust perturbations. it possible identify this by averaging over spin sensitive measures atom's position, based on distribution these states display....
Quantum computing is in its greatest upswing, with so-called noisy-intermediate-scale-quantum devices heralding the computational power to be expected near future. While field progressing toward quantum advantage, computers already have potential tackle classically intractable problems. Here, we consider gauge theories describing fundamental-particle interactions. On way their full-fledged simulations, challenge of limited resources on near-term has overcome. We propose an experimental...
Excited-state quantum phase transitions depend on and reveal the structure of whole spectrum many-body systems. While they are theoretically well understood, finding suitable signatures detect them in actual experiments remains challenging. For instance, spinor gases, excited-state phases have been identified characterized through a topological order parameter that is challenging to measure experiments. Here, we propose Raman-dressed spin-orbit coupled gas as novel platform explore...