Vincent Lienhard
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View article: Mixing of counterpropagating signals in a traveling-wave Josephson device
Mixing of counterpropagating signals in a traveling-wave Josephson device Open
Light waves do not interact in vacuum but can mix in nonlinear media. A strong pump wave can thus convert the frequency of a weaker signal, provided energy and momentum are conserved. These conditions are typically satisfied when all waves…
View article: Generation of Motional Squeezed States for Neutral Atoms in Optical Tweezers
Generation of Motional Squeezed States for Neutral Atoms in Optical Tweezers Open
Optical tweezers are a powerful tool for the precise positioning of a variety of small objects, including single neutral atoms. Once trapped, atoms can be cooled to the motional ground state of the tweezers. For a more advanced control of …
View article: Mixing of counterpropagating signals in a traveling-wave Josephson device
Mixing of counterpropagating signals in a traveling-wave Josephson device Open
Light waves do not interact in vacuum, but may mix through various parametric processes when traveling in a nonlinear medium. In particular, a high-amplitude wave can be leveraged to frequency convert a low-amplitude signal, as long as the…
View article: Enhanced atom-by-atom assembly of arbitrary tweezer arrays
Enhanced atom-by-atom assembly of arbitrary tweezer arrays Open
We report on improvements extending the capabilities of the atom-by-atom assembler described by Barredo et al. [Science 354, 1021 (2016)] that we use to create fully-loaded target arrays of more than 100 single atoms in optical tweezers, s…
View article: Three-Dimensional Trapping of Individual Rydberg Atoms in Ponderomotive Bottle Beam Traps
Three-Dimensional Trapping of Individual Rydberg Atoms in Ponderomotive Bottle Beam Traps Open
We demonstrate three-dimensional trapping of individual Rydberg atoms in holographic optical bottle beam traps. Starting with cold, ground-state ^{87}Rb atoms held in standard optical tweezers, we excite them to nS_{1/2}, nP_{1/2}, or nD_{…
View article: Rydberg atoms, topological order and quantum magnets
Rydberg atoms, topological order and quantum magnets Open
Cold atoms have provided a remarkable route to realize quantum simulators (QS), namely experimental realizations that are as close as possible to model systems (such as e.g. the Hubbard model) and that can serve as direct experimental "sol…
View article: Analysis of imperfections in the coherent optical excitation of single atoms to Rydberg states
Analysis of imperfections in the coherent optical excitation of single atoms to Rydberg states Open
We study experimentally various physical limitations and technical\nimperfections that lead to damping and finite contrast of optically-driven Rabi\noscillations between ground and Rydberg states of a single atom. Finite\ncontrast is due t…
View article: Accurate Mapping of Multilevel Rydberg Atoms on Interacting Spin-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>1</mml:mn><mml:mo stretchy="false">/</mml:mo><mml:mn>2</mml:mn></mml:math> Particles for the Quantum Simulation of Ising Models
Accurate Mapping of Multilevel Rydberg Atoms on Interacting Spin- Particles for the Quantum Simulation of Ising Models Open
We study a system of atoms that are laser driven to nD_{3/2} Rydberg states and assess how accurately they can be mapped onto spin-1/2 particles for the quantum simulation of anisotropic Ising magnets. Using nonperturbative calculations of…
View article: Optical Control of the Resonant Dipole-Dipole Interaction between Rydberg Atoms
Optical Control of the Resonant Dipole-Dipole Interaction between Rydberg Atoms Open
We report on the local control of the transition frequency of a spin 1/2 encoded in two Rydberg levels of an individual atom by applying a state-selective light shift using an addressing beam. With this tool, we first study the spectrum of…
View article: An atom-by-atom assembler of defect-free arbitrary two-dimensional atomic arrays
An atom-by-atom assembler of defect-free arbitrary two-dimensional atomic arrays Open
Making perfect atomic arrays Arrays of atoms can be a useful resource for quantum information. However, loading atoms into arrays is typically a stochastic process, which leads to imperfections. Two groups have now performed defect-free as…