1.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR44 papers
- Philipps University of MarburgDE30 papers
- Deutsches Elektronen-Synchrotron DESYDE27 papers
- Freie Universität BerlinDE24 papers
- European X-Ray Free-Electron LaserDE22 papers
- Goethe University FrankfurtDE22 papers
- University of FreiburgDE20 papers
- Hebrew University of JerusalemIL17 papers
- Fritz Haber Institute of the Max Planck SocietyDE16 papers
- Helmholtz-Zentrum Berlin für Materialien und EnergieDE16 papers
- Johannes Gutenberg University MainzDE14 papers
- Universität HamburgDE14 papers
23 papers · 1 filter
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…
Data Mining on Social Interaction Networks
Martin Atzmueller
Social media and social networks have already woven themselves into the very fabric of everyday life. This results in a dramatic increase of social data capturing various relations…
Optimal control theory for a unitary operation under dissipative evolution
Michael H. Goerz, Daniel M. Reich, Christiane P. Koch
We show that optimizing a quantum gate for an open quantum system requires the time evolution of only three states irrespective of the dimension of Hilbert space. This represents a…
Steering the optimization pathway in the control landscape using constraints
José P. Palao, Daniel M. Reich, Christiane P. Koch
We show how additional constraints, restricting the spectrum of the optimized pulse or confining the system dynamics, can be used to steer optimization in quantum control towards d…
Divisibility of Trinomials by Irreducible Polynomials over F2
Ryul Kim, Wolfram Koepf
Irreducible trinomials of given degree n over do not always exist and in the cases that there is no irreducible trinomial of degree n it may be effective to use trinomials wi…
Deeper Into the Folksonomy Graph: FolkRank Adaptations and Extensions for Improved Tag Recommendations
Nikolas Landia, Stephan Doerfel, Robert Jäschke +3
The information contained in social tagging systems is often modelled as a graph of connections between users, items and tags. Recommendation algorithms such as FolkRank, have the…
Termination criteria for inexact fixed point methods
Philipp Birken
We analyze inexact fixed point iterations where the generating function contains an inexact solve of an equation system to answer the question of how tolerances for the inner solve…
Maximal regularity of the time-periodic Navier-Stokes system
Mads Kyed
Time-periodic solutions to the linearized Navier-Stokes system in the -dimensional whole-space are investigated. For time-periodic data in -spaces, maximal regularity and c…
Cooling molecular vibrations with shaped laser pulses: Optimal control theory exploiting the timescale separation between coherent excitation and spontaneous emission
Daniel M. Reich, Christiane P. Koch
Laser cooling of molecules employing broadband optical pumping involves a timescale separation between laser excitation and spontaneous emission. Here, we optimize the optical pump…
Time optimization and state-dependent constraints in the quantum optimal control of molecular orientation
M. Ndong, C. Koch, D. Sugny
We apply two recent generalizations of monotonically convergent optimization algorithms to the control of molecular orientation by laser fields. We show how to minimize the control…
Satisfiability Games for Branching-Time Logics
Oliver Friedmann, Martin Lange, Markus Latte
The satisfiability problem for branching-time temporal logics like CTL*, CTL and CTL+ has important applications in program specification and verification. Their computational comp…
Controlling magnetic Feshbach resonances in polar open-shell molecules with non-resonant light
Michał Tomza, Rosario González-Férez, Christiane P. Koch +1
Magnetically tunable Feshbach resonances for polar paramagnetic ground-state diatomics are too narrow to allow for magnetoassociation starting from trapped, ultracold atoms. We sho…
Optimal control under spectral constraints: Enforcing multi-photon absorption pathways
Daniel M. Reich, José P. Palao, Christiane P. Koch
Shaped pulses obtained by optimal control theory often possess unphysically broad spectra. In principle, the spectral width of a pulse can be restricted by an additional constraint…
Nonadiabatic Effects in Ultracold Molecules via Anomalous Linear and Quadratic Zeeman Shifts
B. H. McGuyer, C. B. Osborn, M. McDonald +4
Anomalously large linear and quadratic Zeeman shifts are measured for weakly bound ultracold Sr molecules near the intercombination-line asymptote. Nonadiabatic Coriolis…
Two Finite Classes of Orthogonal Functions
Mohammad Masjed-Jamei, Wolfram Koepf
By using Fourier transforms of two symmetric sequences of finite orthogonal polynomials, we introduce two new classes of finite orthogonal functions and obtain their orthogonality…
Optimal strategies for estimating the average fidelity of quantum gates
Daniel M. Reich, Giulia Gualdi, Christiane P. Koch
We show that the minimum experimental effort to characterize the proper functioning of a quantum device scales as 2^n for n qubits and requires classical computational resources ~…
Minimum number of input states required for quantum gate characterization
Daniel M. Reich, Giulia Gualdi, Christiane P. Koch
We derive an algebraic framework which identifies the minimal information required to assess how well a quantum device implements a desired quantum operation. Our approach is based…
Comparative study of monotonically convergent optimization algorithms for the control of molecular rotation
M. Ndong, M. Lapert, C. Koch +1
We apply two different monotonically convergent optimization algorithms to the control of molecular rotational dynamics by laser pulses. This example represents a quantum control p…
Image Compression predicated on Recurrent Iterated Function Systems
Chol-Hui Yun, W. Metzler, M. Barski
Recurrent iterated function systems (RIFSs) are improvements of iterated function systems (IFSs) using elements of the theory of Marcovian stochastic processes which can produce mo…
Drinfeld modular polynomials in higher rank II: Kronecker congruences
Florian Breuer, Hans-Georg Rück
This is a sequel to the paper [F. Breuer, H.-G. Rück, Drinfeld modular polynomials in higher rank, J. Number Theory 129 (2009), 59-83.], in which we introduced Drinfeld modular pol…
Enhancing photoassociation rates by non-resonant light control of shape resonances
Rosario González-Férez, Christiane P. Koch
Photoassociation, assembling molecules from atoms using laser light, is limited by the low density of atom pairs at sufficiently short interatomic separations. Here, we show that n…
VUV Spectroscopic Study of the D^1ΠState of Molecular Deuterium
G. D. Dickenson, T. I. Ivanov, W. Ubachs +10
The D^1Π_u - X^1Σ_g^+ absorption system of molecular deuterium has been re-investigated using the VUV Fourier -Transform (FT) spectrometer at the DESIRS beamline of the synchrotron…
Interatomic potentials, electric properties, and spectroscopy of the ground and excited states of the Rb_2 molecule: Ab initio calculations and effect of a non-resonant field
Michał Tomza, Wojciech Skomorowski, Monika Musiał +3
We formulate the theory for a diatomic molecule in a spatially degenerate electronic state interacting with a non-resonant laser field and investigate its rovibrational structure i…