A5055504537- Cold Atom Physics and Bose-Einstein Condensates
- Quantum many-body systems
- Topological Materials and Phenomena
- Quantum and electron transport phenomena
- Quantum, superfluid, helium dynamics
- Atomic and Subatomic Physics Research
- Physics of Superconductivity and Magnetism
- Quantum optics and atomic interactions
- Quantum Information and Cryptography
- Strong Light-Matter Interactions
- Advanced Frequency and Time Standards
- Electronic and Structural Properties of Oxides
- Graphene research and applications
- Theoretical and Computational Physics
- Quantum Computing Algorithms and Architecture
- Advanced Thermodynamics and Statistical Mechanics
- Advanced Condensed Matter Physics
- Spectroscopy and Laser Applications
- Advanced Fiber Laser Technologies
- Quantum Mechanics and Applications
- Photorefractive and Nonlinear Optics
- Diamond and Carbon-based Materials Research
- Quantum chaos and dynamical systems
- High-Energy Particle Collisions Research
- Terahertz technology and applications
Ludwig-Maximilians-Universität München
2014-2025
Max Planck Institute of Quantum Optics
2011-2025
Munich Center for Quantum Science and Technology
2019-2025
Institut für Urheber- und Medienrecht
2025
Laboratoire Kastler Brossel
2016-2018
Collège de France
2016-2018
Sorbonne Université
2016-2018
Centre National de la Recherche Scientifique
2016-2018
Max Planck Society
2011-2018
Université Paris Sciences et Lettres
2017-2018
We demonstrate the experimental implementation of an optical lattice that allows for generation large homogeneous and tunable artificial magnetic fields with ultracold atoms. Using laser-assisted tunneling in a tilted potential, we engineer spatially dependent complex amplitudes. Thereby, atoms hopping accumulate phase shift equivalent to Aharonov-Bohm charged particles field. determine local distribution fluxes through observation cyclotron orbits on plaquettes, showing system is described...
We use Raman-assisted tunneling in an optical superlattice to generate large tunable effective magnetic fields for ultracold atoms. When hopping the lattice, accumulated phase shift by atom is equivalent Aharonov-Bohm of a charged particle exposed staggered field magnitude, on order 1 flux quantum per plaquette. study ground state this system and observe that frustration induced can lead degenerate noninteracting particles. provide measurement local acquired from Raman-induced tunneling,...
We experimentally study many-body localization (MBL) with ultracold atoms in a weak one-dimensional quasiperiodic potential, which the noninteracting limit exhibits an intermediate phase that is characterized by mobility edge. measure time evolution of initial charge density wave after quench and analyze corresponding relaxation exponents. find clear signatures MBL when model deep localized phase. also critically compare contrast our results those from tight-binding Aubry-Andr\'e model, does...
Artificial gauge fields are currently realized in a wide range of physical settings. This includes solid-state devices but also engineered systems, such as photonic crystals, ultracold gases and mechanical setups. It is the aim this review to offer, for first time, unified view on these various forms artificial electromagnetic spin-orbit couplings matter light. topical provides general introduction universal concept fields, form which accessible young researchers entering field. Moreover,...
The central idea of this review is to consider quantum field theory models relevant for particle physics and replace the fermionic matter in these by a bosonic one. This mostly motivated fact that bosons are more 'accessible' easier manipulate experimentalists, but 'substitution' also leads new novel phenomena. It allows us gain information about among other things confinement dynamics deconfinement transition. We will thus dynamical lattices corresponding Schwinger or [Formula: see text]...
Intriguingly, quantum many-body systems may defy thermalization even without disorder. One example is so-called fragmented models, where the Hilbert space fragments into dynamically disconnected subspaces that are not determined by global symmetries of model. In this Letter we demonstrate tilted one-dimensional Fermi-Hubbard model naturally realizes distinct effective Hamiltonians expected to support nonergodic behavior due fragmentation, at resonances between tilt energy and Hubbard on site...
Abstract A fundamental principle of chaotic quantum dynamics is that local subsystems eventually approach a thermal equilibrium state. The corresponding timescales increase with subsystem size as equilibration limited by the hydrodynamic build-up fluctuations on extended length scales. We perform large-scale simulations monitor particle-number in tunable ladders hard-core bosons and explore how changes system crosses over from integrable to fully dynamics. Our results indicate growth...
The dynamical control of tunneling processes single particles plays a major role in science ranging from Shapiro steps Josephson junctions to the chemical reactions via light molecules. Here we show how such can be extended regime strongly interacting particles. Through weak modulation biased tunnel contact, have been able coherently particle and correlated two-particle hopping processes. We furthermore extend this superexchange spin interactions presence magnetic-field gradient. photon...
Visualization of atomic-scale structural motion by ultrafast electron diffraction and microscopy requires packets shortest duration highest coherence. We report on the generation application single-electron pulses for this purpose. Photoelectric emission from metal surfaces is studied with tunable ultraviolet in femtosecond regime. The bandwidth, efficiency, coherence, pulse are investigated dependence excitation wavelength, intensity, laser bandwidth. At photon energies close to cathode's...
Quantum systems can show qualitatively new forms of behavior when they are driven by fast time-periodic modulations. In the limit large driving frequency, long-time dynamics such often be described a time-independent effective Hamiltonian, which is generally identified through perturbative treatment. Here, we present general formalism that describes time-modulated physical systems, in frequency large, but resonant with respect to energy spacings inherent system at rest. Such situation...
An implementation of a simple lattice gauge theory coupled to matter is proposed for ultracold atoms in optical lattices.
In superfluid systems several sound modes can be excited, such as, for example, first and second in liquid helium. Here, we excite running standing waves a uniform two-dimensional Bose gas characterize the propagation of both normal regimes. phase, measured speed is good agreement with prediction two-fluid hydrodynamic model, weak damping well explained by scattering thermal excitations. phase observe stronger damping, which attribute to departure from behavior.
The thermalization of isolated quantum many-body systems is deeply related to fundamental questions information theory. While integrable or localized display non-ergodic behavior due extensively many conserved quantities, recent theoretical studies have identified a rich variety more exotic phenomena in between these two extreme limits. tilted one-dimensional Fermi-Hubbard model, which readily accessible experiments with ultracold atoms, emerged as an intriguing playground study clean...
We propose a scheme to implement Kitaev's honeycomb model with cold atoms, based on periodic (Floquet) drive, in view of realizing and probing non-Abelian chiral spin liquids using quantum simulators. derive the effective Hamiltonian leading order inverse-frequency expansion, show that drive opens up topological gap spectrum without mixing Majorana vortex degrees freedom. address challenge physics fermions, while having access only original composite Specifically, we detect properties liquid...
The sine-Gordon model emerges as a low-energy theory in plethora of quantum many-body systems. Here, we theoretically investigate tunnel-coupled Bose-Hubbard chains with strong repulsive interactions realization the deep regime. We propose protocols for gas microscopes ultracold atoms to prepare and analyze solitons, which are fundamental topological excitations emergent theory. With numerical simulations based on matrix product states, characterize preparation detection discuss experimental...
Quantum gas microscopes have revolutionized quantum simulations with ultracold atoms, allowing one to measure local observables and snapshots of states. However, measurements so far were mostly carried out in the occupation basis. Here, we demonstrate how all kinetic operators, such as energy or current can be measured manipulated single-bond resolution. Beyond simple expectation values these observables, single-shot allow access full counting statistics complex correlation functions. Our...