Publications (110)
Efficient measurement of quantum gate error by interleaved randomized benchmarking
Easwar Magesan, Jay M. Gambetta, B. R. Johnson +9
Integral Field Spectroscopy of Faint Haloes of Planetary Nebulae
A. Monreal-Ibero, M. M. Roth, D. Schoenberner +2
A hydrodynamical study of multiple-shell planetary nebulae. III. Expansion properties and internal kinematics: Theory versus observation
D. Schoenberner, R. Jacob, H. Lehmann +5
Inter-network regions of the Sun at millimetre wavelengths
S. Wedemeyer-Boehm, H. -G. Ludwig, M. Steffen +2
Using the CIFIST grid of CO5BOLD 3D model atmospheres to study the effects of stellar granulation on photometric colours. II. The role of convection accross the H-R diagram
A. KuÄinskas, J. Klevas, H. -G. Ludwig +3
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. IV. Oxygen diagnostics in extremely metal-poor red giants with infrared OH lines
V. Dobrovolskas, A. KuÄinskas, P. Bonifacio +4
Lithium abundances of Main Sequence and Sub-Giant stars in the Globular Cluster NGC 6397
J. I. González Hernández, P. Bonifacio, E. Caffau +6
Enhanced methods for computing spectra from CO5BOLD models using Linfor3D. Molecular bands in metal-poor stars
A. J. Gallagher, M. Steffen, E. Caffau +3
Microwave-activated conditional-phase gate for superconducting qubits
Jerry M. Chow, Jay M. Gambetta, Andrew W. Cross +3
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars II. Spectral line formation in the atmosphere of a giant located near the RGB tip
A. Kucinskas, M. Steffen, H. -G. Ludwig +6
The Gaia-ESO Survey: Galactic evolution of sulphur and zinc
S. Duffau, E. Caffau, L. Sbordone +48
Weak magnetic fields in central stars of planetary nebulae?
M. Steffen, S. Hubrig, H. Todt +4
Rebirth of X-ray Emission from the Born-Again Planetary Nebula A 30
M. A. Guerrero, N. Ruiz, W. -R. Hamann +8
TOPoS V: Abundance ratios in a sample of very metal-poor turn-off stars
P. François, E. Caffau, P. Bonifacio +12
Gaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars
R. Smiljanic, A. J. Korn, M. Bergemann +99
A simple all-microwave entangling gate for fixed-frequency superconducting qubits
Jerry M. Chow, A. D. Corcoles, Jay M. Gambetta +8
Abundances of lithium, oxygen, and sodium in the turn-off stars of Galactic globular cluster 47 Tuc
V. Dobrovolskas, A. KuÄinskas, P. Bonifacio +7
Convection and 6Li in the atmospheres of metal-poor halo stars
M. Steffen, R. Cayrel, P. Bonifacio +2
Effects of Photospheric Temperature Inhomogeneities on Lithium Abundance Determinations (2D)
R. Cayrel, M. Steffen
Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits
Jerry M. Chow, Jay M. Gambetta, A. D. Corcoles +9
Detection of a Far-Infrared Bow-Shock Nebula Around R Hya: the First MIRIAD Results
T. Ueta, A. K. Speck, R. E. Stencel +10
An in-depth spectroscopic examination of molecular bands from 3D hydrodynamical model atmospheres. II. Carbon-enhanced metal-poor 3D model atmospheres
A. J. Gallagher, E. Caffau, P. Bonifacio +4
A super lithium-rich red-clump star in the open cluster Trumpler 5
L. Monaco, H. M. J. Boffin, P. Bonifacio +7
Lithium spectral line formation in stellar atmospheres. The impact of convection and NLTE effects
J. Klevas, A. KuÄinskas, M. Steffen +2
TOPoS: II. On the bimodality of carbon abundance in CEMP stars. Implications on the early chemical evolution of galaxies
P. Bonifacio, E. Caffau, M. Spite +18
The evolution of planetary nebulae IV. On the physics of the luminosity function
D. Schoenberner, R. Jacob, M. Steffen +1
An in-depth spectroscopic examination of molecular bands from 3D hydrodynamical model atmospheres I. Formation of the G-band in metal-poor dwarf stars
A. J. Gallagher, E. Caffau, P. Bonifacio +3
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. V. Oxygen abundance in the metal-poor giant HD 122563 from OH UV lines
D. PrakapaviÄius, A. KuÄinskas, V. Dobrovolskas +5
Abundances of Na, Mg, and K in the atmospheres of red giant branch stars of Galactic globular cluster 47 Tucanae
A. Äerniauskas, A. KuÄinskas, J. Klevas +6
Solution to the problem of the surface gravity distribution of cool DA white dwarfs from improved 3D model atmospheres
P. -E. Tremblay, H. -G. Ludwig, M. Steffen +2
Process verification of two-qubit quantum gates by randomized benchmarking
A. D. Córcoles, Jay M. Gambetta, Jerry M. Chow +5
The solar photospheric abundance of hafnium and thorium. Results from CO5BOLD 3D hydrodynamic model atmospheres
Elisabetta Caffau, L. Sbordone, H. -G. Ludwig +3
Spectroscopic analysis of DA white dwarfs with 3D model atmospheres
P. -E. Tremblay, H. -G. Ludwig, M. Steffen +1
The solar photospheric nitrogen abundance. Analysis of atomic transitions with 3D and 1D model atmospheres
E. Caffau, E. Maiorca, P. Bonifacio +5
Lithium abundance and 6Li/7Li ratio in the active giant HD123351 I. A comparative analysis of 3D and 1D NLTE line-profile fits
A. Mott, M. Steffen, E. Caffau +2
Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
Chad Rigetti, Stefano Poletto, Jay M. Gambetta +10
The Chandra X-ray Survey of Planetary Nebulae (ChanPlaNS): Probing Binarity, Magnetic Fields, and Wind Collisions
J. H. Kastner, R. Montez, B. Balick +23
Hydrodynamical simulations of convection-related stellar micro-variability. II. The enigmatic granulation background of the COROT target HD49933
H. -G. Ludwig, R. Samadi, M. Steffen +6
Abundances of Mg and K in the atmospheres of turn-off stars in Galactic globular cluster 47 Tucanae
A. Äerniauskas, A. KuÄinskas, J. Klevas +6
Rapid Driven Reset of a Qubit Readout Resonator
D. T. McClure, Hanhee Paik, L. S. Bishop +3
TOPoS: IV. Chemical abundances from high-resolution observations of seven EMP stars
P. Bonifacio, E. Caffau, M. Spite +15
Toward better simulations of planetary nebulae luminosity functions
R. H. Mendez, A. M. Teodorescu, D. Schoenberner +2
The photospheric solar oxygen project: IV. 3D-NLTE investigation of the 777 nm triplet lines
M. Steffen, D. PrakapaviÄius, E. Caffau +5
3D non-LTE corrections for Li abundance and 6Li/7Li isotopic ratio in solar-type stars I. Application to HD 207129 and HD 95456
G. Harutyunyan, M. Steffen, A. Mott +4
The photospheric solar oxygen project: III. Investigation of the centre-to-limb variation of the 630nm [OI]-NiI blend
E. Caffau, H. -G. Ludwig, M. Steffen +5
Pure-hydrogen 3D model atmospheres of cool white dwarfs
P. -E. Tremblay, H. -G. Ludwig, M. Steffen +1
Granulation properties of giants, dwarfs, and white dwarfs from the CIFIST 3D model atmosphere grid
P. -E. Tremblay, H. -G. Ludwig, B. Freytag +2
Experimental demonstration of a resonator-induced phase gate in a multi-qubit circuit QED system
Hanhee Paik, A. Mezzacapo, Martin Sandberg +10
The evolution of planetary nebulae VI. On the chemical composition of the metal-poor PN G135.9+55.9
C. Sandin, R. Jacob, D. Schönberner +2
Oxygen spectral line synthesis: 3D non-LTE with CO5BOLD hydrodynamical model atmospheres
D. Prakapavicius, M. Steffen, A. Kucinskas +4
3-D hydrodynamic simulations of convection in A stars
O. Kochukhov, B. Freytag, N. Piskunov +1
Simulations of the solar near-surface layers with the CO5BOLD, MURaM, and Stagger codes
B. Beeck, R. Collet, M. Steffen +6
A calibration of the mixing-length for solar-type stars based on hydrodynamical simulations - I. Methodical aspects and results for solar metallicity
H. -G. Ludwig, B. Freytag, M. Steffen
SSALMON - The Solar Simulations for the Atacama Large Millimeter Observatory Network
S. Wedemeyer, T. Bastian, R. Brajsa +27
The metal-poor end of the Spite plateau. 1: Stellar parameters, metallicities and lithium abundances
L. Sbordone, P. Bonifacio, E. Caffau +16
The solar photospheric abundance of carbon.Analysis of atomic carbon lines with the CO5BOLD solar model
E. Caffau, H. -G. Ludwig, P. Bonifacio +5
6Li in metal-poor halo stars: real or spurious?
M. Steffen, R. Cayrel, P. Bonifacio +2
The evolution of planetary nebulae VII. Modelling planetary nebulae of distant stellar systems
D. Schönberner, R. Jacob, C. Sandin +1
3D Model Atmospheres for Extremely Low-Mass White Dwarfs
P. -E. Tremblay, A. Gianninas, M. Kilic +4
A primordial star in the heart of the Lion
E. Caffau, P. Bonifacio, P. François +14
The CIFIST 3D model atmosphere grid
H. -G. Ludwig, E. Caffau, M. Steffen +3
The influence of convection on the atmospheric structures and observable properties of red giant stars
A. Kucinskas, H. -G. Ludwig, M. Steffen +5
Entanglement of two superconducting qubits in a waveguide cavity via monochromatic two-photon excitation
S. Poletto, Jay M. Gambetta, Seth T. Merkel +9
Line formation in convective stellar atmospheres. I. Granulation corrections for solar photospheric abundances
M. Steffen, H. Holweger
3D Simulation of Convection and Spectral Line Formation in A-type Stars
M. Steffen, B. Freytag, H. -G. Ludwig
The evolution of planetary nebulae. VIII. True expansion rates and visibility times
R. Jacob, D. Schoenberner, M. Steffen
Self-Consistent Quantum Process Tomography
Seth T. Merkel, Jay M. Gambetta, John A. Smolin +5
Near-surface stellar magneto-convection: simulations for the Sun and a metal-poor solar analog
M. Steffen, H. -G. Ludwig, O. Steiner
3D hydrodynamical simulations of stellar photospheres with the CO5BOLD code: photometric colors of a late-type giant
A. Kucinskas, H. -G. Ludwig, E. Caffau +1
Abundance of zinc in the red giants of Galactic globular cluster 47 Tucanae
A. Äerniauskas, A. KuÄinskas, J. Klevas +4
Isotope Spectroscopy
E. Caffau, M. Steffen, P. Bonifacio +4
Spectral line asymmetries in the metal-poor red giant HD 122563: CO5BOLD predictions versus observations
J. Klevas, A. Kucinskas, H. -G. Ludwig +3
Characterization of addressability by simultaneous randomized benchmarking
Jay M. Gambetta, A. D. Corcoles, S. T. Merkel +9
Detecting arbitrary quantum errors via stabilizer measurements on a sublattice of the surface code
A. D. Córcoles, Easwar Magesan, Srikanth J. Srinivasan +4
Modeling the diffuse X-ray emission of Planetary Nebulae with different chemical composition
M. Steffen, C. Sandin, R. Jacob +1
Implementing a strand of a scalable fault-tolerant quantum computing fabric
Jerry M. Chow, Jay M. Gambetta, Easwar Magesan +7
Confronting expansion distances of planetary nebulae with Gaia DR2 measurements
D. Schönberner, M. Steffen
Micro- and macroturbulence predictions from CO5BOLD 3D stellar atmospheres
M. Steffen, E. Caffau, H. -G. Ludwig
Protecting superconducting qubits from external sources of loss and heat
Antonio D. Córcoles, Jerry M. Chow, Jay M. Gambetta +6
The Solar Photospheric Nitrogen Abundance: Determination with 3D and 1D Model Atmospheres
E. Maiorca, E. Caffau, P. Bonifacio +5
NMR implementation of a building block for scalable quantum computation
D. E. Chang, L. M. K. Vandersypen, M. Steffen
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. III. Line formation in the atmospheres of giants located close to the base of RGB
V. Dobrovolskas, A. KuÄinskas, M. Steffen +5
PEPSI deep spectra. I. The Sun-as-a-star
K. G. Strassmeier, I. Ilyin, M. Steffen
Lithium in the Globular Cluster NGC 6397: Evidence for dependence on evolutionary status
J. I. Gonzalez Hernandez, P. Bonifacio, E. Caffau +6
The Chandra Planetary Nebula Survey (ChanPlaNS). II. X-ray Emission from Compact Planetary Nebulae
M. Freeman, R. Montez, J. H. Kastner +24
Oxygen in the early Galaxy: OH lines as tracers of oxygen abundance in extremely metal-poor giant stars
A. Kucinskas, V. Dobrovolskas, P. Bonifacio +4
Chemical composition of a sample of bright solar-metallicity stars
E. Caffau, A. Mott, M. Steffen +5
Accuracy of spectroscopy-based radioactive dating of stars
H. -G. Ludwig, E. Caffau, M. Steffen +2
Carbon monoxide in the solar atmosphere II. Radiative cooling by CO lines
S. Wedemeyer-Böhm, M. Steffen
Calibration of the Mixing-Length Theory for Convective White Dwarf Envelopes
P. -E. Tremblay, H. -G. Ludwig, B. Freytag +3
New observations of the halo radial temperature structure in NGC7662
C. Sandin, D. Schoenberner, M. M. Roth +4
Solar abundances and 3D model atmospheres
H. -G. Ludwig, E. Caffau, M. Steffen +3
Lithium depletion in the sun: a study of mixing based on hydrodynamical simulations
T. Bloecker, H. Holweger, B. Freytag +3
Main-Sequence and sub-giant stars in the Globular Cluster NGC6397: The complex evolution of the lithium abundance
J. I. González Hernández, P. Bonifacio, E. Caffau +6
The Chandra Planetary Nebulae Survey (ChanPlaNS): III. X-ray Emission from the Central Stars of Planetary Nebulae
R. Montez, J. H. Kastner, B. Balick +25
TOPoS: I. Survey design and analysis of the first sample
E. Caffau, P. Bonifacio, L. Sbordone +14
Investigating surface loss effects in superconducting transmon qubits
J. M. Gambetta, C. E. Murray, Y. -K. -K. Fung +5
Carbon-enhanced metal-poor 3D model atmospheres
M. Steffen, A. J. Gallagher, E. Caffau +2
The evolution of planetary nebulae. V. The diffuse X-ray emission
M. Steffen, D. Schoenberner, A. Warmuth
TOPoS: III. An ultra iron-poor multiple CEMP system
E. Caffau, P. Bonifacio, M. Spite +15