Publications (19)
Sympathetic Cooling of Lithium by Laser-cooled Cesium
S. Kraft, M. Mudrich, K. Singer +3
We present first indications of sympathetic cooling between two neutral, optically trapped atomic species. Lithium and cesium atoms are simultaneously stored in an optical dipole t…
Global Albedos of Pluto and Charon from LORRI New Horizons Observations
B. J. Buratti, J. D. Hofgartner, M. D. Hicks +14
The exploration of the Pluto-Charon system by the New Horizons spacecraft represents the first opportunity to understand the distribution of albedo and other photometric properties…
How can a 22-pole ion trap exhibit 10 local minima in the effective potential?
R. Otto, P. Hlavenka, S. Trippel +4
The column density distribution of trapped OH ions in a 22-pole ion trap is measured for different trap parameters. The density is obtained from position-dependent photodetachm…
Reorientation of Sputnik Planitia implies a Subsurface Ocean on Pluto
F. Nimmo, D. P. Hamilton, W. B. McKinnon P. M. Schenk +60
The deep nitrogen-covered Sputnik Planitia (SP; informal name) basin on Pluto is located very close to the longitude of Pluto's tidal axis[1] and may be an impact feature [2], by a…
Transient Non-Confining Potentials for Speeding Up a Single Ion Heat Pump
E. Torrontegui, S. T. Dawkins, M. Göb +1
We propose speeding up a single ion heat pump based on a tapered ion trap. If a trapped ion is excited in an oscillatory motion axially the radial degrees of freedom are cyclically…
Observation of the Kibble-Zurek scaling law for defect formation in ion crystals
S. Ulm, J. RoÃnagel, G. Jacob +8
Traversal of a symmetry-breaking phase transition at a finite rate can lead to causallyseparated regions with incompatible symmetries and the formation of defects at their boundari…
Feedback-Optimized Operations with Linear Ion Crystals
J. F. Eble, S. Ulm, P. Zahariev +2
We report on transport operations with linear crystals of 40Ca+ ions by applying complex electric time-dependent potentials. For their control we use the information obtained from…
Controlling the transport of an ion: Classical and quantum mechanical solutions
H. A. Fürst, M. H. Goerz, U. G. Poschinger +6
We investigate the performance of different control techniques for ion transport in state-of-the-art segmented miniaturized ion traps. We employ numerical optimization of classical…
Fabrication of a planar micro Penning trap and numerical investigations of versatile ion positioning protocols
M. Hellwig, A. Bautista-Salvador, K. Singer +2
We describe a versatile planar Penning trap structure, which allows to dynamically modify the trapping conguration almost arbitrarily. The trap consists of 37 hexagonal electrodes,…
Sympathetic Cooling with Two Atomic Species in an Optical Trap
M. Mudrich, S. Kraft, K. Singer +3
We simultaneously trap ultracold lithium and cesium atoms in an optical dipole trap formed by the focus of a CO laser and study the exchange of thermal energy between the gases…
Convection in a volatile nitrogen-ice-rich layer drives Pluto's geological vigor
William B. McKinnon, Francis Nimmo, Teresa Wong +61
The vast, deep, volatile-ice-filled basin informally named Sputnik Planum is central to Pluto's geological activity[1,2]. Composed of molecular nitrogen, methane, and carbon monoxi…
Mixture of ultracold lithium and cesium atoms in an optical dipole trap
A. Mosk, S. Kraft, M. Mudrich +4
We present the first simultaneous trapping of two different ultracold atomic species in a conservative trap. Lithium and cesium atoms are stored in an optical dipole trap formed by…
Transport of ions in a segmented linear Paul trap in printed-circuit-board technology
G. Huber, T. Deuschle, W. Schnitzler +3
We describe the construction and operation of a segmented linear Paul trap, fabricated in printed-circuit-board technology with an electrode segment width of 500 microns. We prove…
Precision measurements in ion traps using slowly moving standing waves
A. Walther, U. Poschinger, K. Singer +1
The present paper describes the experimental implementation of a measuring technique employing a slowly moving, near resonant, optical standing wave in the context of trapped ions.…
Experimental creation and analysis of displaced number states
F. Ziesel, T. Ruster, A. Walther +4
We create displaced number states, which are nonclassical generalizations of coherent states, of a vibrational mode of a single trapped ion.
Deterministic Ultracold Ion Source targeting the Heisenberg Limit
W. Schnitzler, N. M. Linke, R. Fickler +3
The major challenges to fabricate quantum processors and future nano solid state devices are material modification techniques with nanometre resolution and suppression of statistic…
Coherent Manipulation of a Ca Spin Qubit in a Micro Ion Trap
U. G. Poschinger, G. Huber, F. Ziesel +8
We demonstrate the implementation of a spin qubit with a single Ca ion in a micro ion trap. The qubit is encoded in the Zeeman ground state levels mJ=+1/2 and mJ=-1/2 of the S1/2 s…
Concept of deterministic single ion doping with sub-nm spatial resolution
J. Meijer, T. Vogel, B. Burchard +9
We propose a method for deterministic implantation of single atoms into solids which relies on a linear ion trap as an ion source. Our approach allows a deterministic control of th…
Simulation of a quantum phase transition of polaritons with trapped ions
P. A. Ivanov, S. S. Ivanov, N. V. Vitanov +3
We present a novel system for the simulation of quantum phase transitions of collective internal qubit and phononic states with a linear crystal of trapped ions. The laser-ion inte…