168 citations · 1.7k across the 44 of their papers we have counts for
27 papers · 1 filter
Chiral resolution by composite Raman pulses
Boyan T. Torosov, Michael Drewsen, Nikolay V. Vitanov
We present two methods for efficient detection of chiral molecules based on sequences of single pulses and Raman pulse pairs. The chiral molecules are modelled by a closed-loop thr…
Unresolved sideband photon recoil spectroscopy of molecular ions
Emilie H. Clausen, Vincent Jarlaud, Karin Fisher +3
We reflect on the prospect of exploiting the recoil associated with absorption and emission of photons to perform spectroscopy of a single molecular ion. For this recoil to be dete…
Efficient and robust chiral resolution by composite pulses
Boyan T. Torosov, Michael Drewsen, Nikolay V. Vitanov
We introduce a method for detection of chiral molecules using sequences of three pulses driving a closed-loop three-state quantum system. The left- and right-handed enantiomers hav…
Roadmap on STIRAP applications
Klaas Bergmann, Hanns-Christoph Nägerl, Cristian Panda +31
STIRAP (Stimulated Raman Adiabatic Passage) is a powerful laser-based method, usually involving two photons, for efficient and selective transfer of population between quantum stat…
Quantum duets working as autonomous thermal motors
Michael Drewsen, Alberto Imparato
We study the dynamic properties of a thermal autonomous machine made up of two quantum Brownian particles, each of which is in contact with an environment at different temperature…
Rotational state changes in collisions of diatomic molecular ions with atomic ions
J. Martin Berglund, Michael Drewsen, Christiane P. Koch
We investigate rotational state changes in a single collision of diatomic molecular ions, polar or apolar, with an atomic ion. Rotational state changes may occur since the angular…
Optically-Induced Highly-Efficient Detection and Separation of Chiral Molecules through Shortcuts to Adiabaticity
Nikolay V. Vitanov, Michael Drewsen
A highly-efficient method for optical detection and separation of left- and right-handed chiral molecules is presented. The method utilizes a closed-loop three-state system in whic…
Controlling the potential landscape and normal modes of ion Coulomb crystals by a standing wave optical potential
Thomas Lauprêtre, Rasmus B. Linnet, Ian D. Leroux +3
Light-induced control of ions within small Coulomb crystals is investigated. By intense intracavity optical standing wave fields, subwavelength localization of individual ions is a…
Direct frequency-comb-driven Raman transitions in the terahertz range
Cyrille Solaro, Steffen Meyer, Karin Fisher +2
We demonstrate the use of a femtosecond frequency comb to coherently drive stimulated Raman transitions between terahertz-spaced atomic energy levels. More specifically, we address…
Transient dynamics in cavity electromagnetically induced transparency with ion Coulomb crystals
Magnus Albert, Aurélien Dantan, Michael Drewsen
We experimentally investigate the transient dynamics of an optical cavity field interacting with large ion Coulomb crystals in a situation of electromagnetically induced transparen…
Localization of ions within one-, two- and three-dimensional Coulomb crystals by a standing wave optical potential
Thomas Lauprêtre, Rasmus B. Linnet, Ian D. Leroux +2
We demonstrate light-induced localization of Coulomb-interacting particles in multi-dimensional structures. Subwavelength localization of ions within small multi-dimensional Coulom…
Femtosecond wavepacket interferometry using the rotational dynamics of a trapped cold molecular ion
J. Martin Berglund, Michael Drewsen, Christiane P. Koch
A Ramsey-type interferometer is suggested, employing a cold trapped ion and two time-delayed off-resonant femtosecond laser pulses. The laser light couples to the molecular polariz…
General scheme for the construction of a protected qubit subspace
N. Aharon, M. Drewsen, A. Retzker
We present a new robust decoupling scheme suitable for levels with either half integer or integer angular momentum states. Through continuous dynamical decoupling techniques, we cr…
Analysis of a photon number resolving detector based on an ion Coulomb crystal inside an optical cavity
Christoph Clausen, Nicolas Sangouard, Michael Drewsen
The ability to detect single photons with high efficiency is a crucial requirement for various quantum information applications. By combining the storage process of a quantum memor…
Spatial mode effects in a cavity EIT-based quantum memory with ion Coulomb crystals
Kasper R. Zangenberg, Aurélien Dantan, Michael Drewsen
Quantum storage and retrieval of light in ion Coulomb crystals using cavity electromagnetically induced transparency is investigated theoretically. It is found that, when both the…
All-cavity electromagnetically induced transparency and optical switching: semiclassical theory
Aurelien Dantan, Magnus Albert, Michael Drewsen
The transmission of a probe field experiencing electromagnetically induced transparency and optical switching in an atomic medium enclosed in an optical cavity is investigated. Usi…
Collective strong coupling between ion Coulomb crystals and an optical cavity field: Theory and experiment
M. Albert, J. P. Marler, P. F. Herskind +2
A detailed description and theoretical analysis of experiments achieving coherent coupling between an ion Coulomb crystal and an optical cavity field are presented. The various met…
Atom-mirror cooling and entanglement using cavity Electromagnetically Induced Transparency
Claudiu Genes, Helmut Ritsch, Michael Drewsen +1
We investigate a hybrid optomechanical system comprised of a mechanical oscillator and an atomic 3-level ensemble within an optical cavity. We show that a suitably tailored cavity…
Cavity electromagnetically induced transparency and all-optical switching using ion Coulomb crystals
Magnus Albert, Aurelien Dantan, Michael Drewsen
The control of one light field by another, ultimately at the single photon level, is a challenging task which has numerous interesting applications within nonlinear optics and quan…
Positioning of the rf potential minimum line of a linear Paul trap with micrometer precision
P. F. Herskind, A. Dantan, M. Albert +2
We demonstrate a general technique to achieve a precise radial displacement of the nodal line of the radiofrequency (rf) field in a linear Paul trap. The technique relies on select…
Loading of large ion Coulomb crystals into a linear Paul trap incorporating an optical cavity for cavity QED studies
P. Herskind, A. Dantan, M. B. Langkilde-Lauesen +3
We report on the loading of large ion Coulomb crystals into a linear Paul trap incorporating a high-Finesse optical cavity (F~3200). We show that, even though the 3-mm diameter die…
Two-step Doppler cooling of a three-level ladder system with an intermediate metastable level
Caroline Champenois, Gaetan Hagel, Martina Knoop +4
Doppler laser cooling of a three-level ladder system using two near-resonant laser fields is analyzed in the case of the intermediate level being metastable while the upper level i…
Efficient qubit detection using alkali earth metal ions and a double STIRAP process
Ditte Møller, Jens L. Sørensen, Jakob B. Thomsen +1
We present a scheme for robust and efficient projection measurement of a qubit consisting of the two magnetic sublevels in the electronic ground state of alkali earth metal ions. T…
Efficient coherent internal state transfer in trapped ions using Stimulated Raman Adiabatic Passage
Jens L. Sørensen, Ditte Møller, Theis Iversen +5
We demonstrate experimentally how the process of Stimulated Raman Adiabatic Passage (STIRAP) can be utilized for efficient coherent internal state transfer in single trapped and la…