267 citations · 1.1k across the 25 of their papers we have counts for
25 papers
Alignment and Optimisation of Optical Tweezers on Trapped Ions
M. Mazzanti, C. Robalo Pereira, N. A. Diepeveen +7
This paper presents a routine to align an optical tweezer on a single trapped ion and use the ion as a probe to characterize the tweezer. We find a smallest tweezer waist of $2.3(2…
Trap-assisted complexes in cold atom-ion collisions
H. Hirzler, E. Trimby, R. Gerritsma +2
We theoretically investigate the trap-assisted formation of complexes in atom-ion collisions and their impact on the stability of the trapped ion. The time-dependent potential of t…
Ultracold ion-atom experiments: cooling, chemistry, and quantum effects
Rianne S. Lous, Rene Gerritsma
Experimental setups that study laser-cooled ions immersed in baths of ultracold atoms merge the two exciting and well-established fields of quantum gases and trapped ions. These ex…
Observation of Chemical Reactions between a Trapped Ion and Ultracold Feshbach Dimers
H. Hirzler, R. S. Lous, E. Trimby +3
We measure chemical reactions between a single trapped Yb ion immersed in an ultracold bath of Li atoms containing trace amounts of Li dimers. This produces LiY…
Buffer gas cooling of ions in time-dependent traps using ultracold atoms
E. Trimby, H. Hirzler, H. Fürst +3
For exploration of quantum effects with hybrid atom-ion systems, reaching ultracold temperatures is the major limiting factor. In this work, we present results on numerical simulat…
Dynamics of a trapped ion in a quantum gas: effects of particle statistics
Lorenzo Oghittu, Melf Johannsen, Rene Gerritsma +1
We study the quantum dynamics of an ion confined in a radiofrequency trap in interaction with either a Bose or spin-polarized Fermi gas. To this end, we derive quantum optical mast…
Trapped Ion Quantum Computing using Optical Tweezers and Electric Fields
M. Mazzanti, R. X. Schüssler, J. D. Arias Espinoza +3
We propose a new scalable architecture for trapped ion quantum computing that combines optical tweezers delivering qubit state-dependent local potentials with oscillating electric…
A high-fidelity method for a single-step -bit Toffoli gate in trapped ions
Juan Diego Arias Espinoza, Koen Groenland, Matteo Mazzanti +2
Conditional multi-qubit gates are a key component for elaborate quantum algorithms. In a recent work, Rasmussen et al. (Phys. Rev. A 101, 022308) proposed an efficient single-step…
Controlling the nature of a charged impurity in a bath of Feshbach dimers
Henrik Hirzler, Eleanor Trimby, Rianne S. Lous +3
We theoretically study the dynamics of a trapped ion that is immersed in an ultracold gas of weakly bound atomic dimers created by a Feshbach resonance. Using quasi-classical simul…
Experimental setup for studying an ultracold mixture of trapped Yb-Li
H. Hirzler, T. Feldker, H. Fürst +7
We describe and characterize an experimental apparatus that has been used to study interactions between ultracold lithium atoms and ytterbium ions. The preparation of ultracold clo…
Buffer gas cooling of a trapped ion to the quantum regime
T. Feldker, H. Fürst, H. Hirzler +5
Great advances in precision quantum measurement have been achieved with trapped ions and atomic gases at the lowest possible temperatures. These successes have inspired ideas to me…
Observation of Interactions between Trapped Ions and Ultracold Rydberg Atoms
N. V. Ewald, T. Feldker, H. Hirzler +2
We report on the observation of interactions between ultracold Rydberg atoms and ions in a Paul trap. The rate of observed inelastic collisions, which manifest themselves as charge…
Prospects of reaching the quantum regime in Li-Yb mixtures
H. A. Fürst, N. V. Ewald, T. Secker +3
We perform numerical simulations of trapped Yb ions that are buffer gas cooled by a cold cloud of Li atoms. This species combination has been suggested to be the mo…
Cold hybrid ion-atom systems
Michał Tomza, Krzysztof Jachymski, Rene Gerritsma +4
Hybrid systems of laser-cooled trapped ions and ultracold atoms combined in a single experimental setup have recently emerged as a new platform for fundamental research in quantum…
Observation of collisions between cold Li atoms and Yb ions
J. Joger, H. Fürst, N. Ewald +3
We report on the observation of cold collisions between Li atoms and Yb ions. This combination of species has recently been proposed as the most suitable for reaching the q…
Trapped ions in Rydberg-dressed atomic gases
T. Secker, N. Ewald, J. Joger +3
We theoretically study trapped ions that are immersed in an ultracold gas of Rydberg-dressed atoms. By off-resonant coupling on a dipole-forbidden transition, the adiabatic atom-io…
Controlled long-range interactions between Rydberg atoms and ions
Thomas Secker, Rene Gerritsma, Alexander W. Glaetzle +1
We theoretically investigate trapped ions interacting with atoms that are coupled to Rydberg states. The strong polarizabilities of the Rydberg levels increases the interaction str…
Impact of Many-Body Correlations on the Dynamics of an Ion-Controlled Bosonic Josephson Junction
J. M. Schurer, R. Gerritsma, P. Schmelcher +1
We investigate an atomic ensemble of interacting bosons trapped in a symmetric double well potential in contact with a single tightly trapped ion which has been recently proposed […
Rydberg excitation of a single trapped ion
T. Feldker, P. Bachor, M. Stappel +4
We demonstrate excitation of a single trapped cold Ca ion to Rydberg levels by laser radiation in the vacuum-ultraviolet at 122 nm wavelength. Observed resonances are id…
Hexagonal Plaquette Spin-spin Interactions and Quantum Magnetism in a Two-dimensional Ion Crystal
Rejish Nath, Marcello Dalmonte, Alexander W Glaetzle +3
We propose a trapped ion scheme en route to realize spin Hamiltonians on a Kagome lattice which, at low energies, are described by emergent Z2 gauge fields, and support a topologic…
Generalised Kronig-Penney model for ultracold atomic quantum systems
A. Negretti, R. Gerritsma, Z. Idziaszek +2
We study the properties of a quantum particle interacting with a one dimensional structure of equidistant scattering centres. We derive an analytical expression for the dispersion…
Quantum dynamics of an atomic double-well system interacting with a trapped ion
Jannis Joger, Antonio Negretti, Rene Gerritsma
We theoretically analyze the dynamics of an atomic double-well system with a single ion trapped in its center. We find that the atomic tunnelling rate between the wells depends bot…
Emulating Solid-State Physics with a Hybrid System of Ultracold Ions and Atoms
U. Bissbort, D. Cocks, A. Negretti +5
We propose and theoretically investigate a hybrid system composed of a crystal of trapped ions coupled to a cloud of ultracold fermions. The ions form a periodic lattice and induce…
Entangled states of trapped ions allow measuring the magnetic field gradient of a single atomic spin
F. Schmidt-Kaler, R. Gerritsma
Using trapped ions in an entangled state we propose detecting a magnetic dipole of a single atom at distance of a few m. This requires a measurement of the magnetic field gradie…