8 papers
Determining the nature of quantum resonances by probing elastic and reactive scattering in cold collisions
Prerna Paliwal, Nabanita Deb, Daniel M. Reich +3
Scattering resonances play a central role in collision processes in physics and chemistry. They help building an intuitive understanding of the collision dynamics due to the spatia…
Fundamental Bounds on Qubit Reset
Daniel Basilewitsch, Jonas Fischer, Daniel M. Reich +2
Qubit reset is a basic prerequisite for operating quantum devices, requiring the export of entropy. The fastest and most accurate way to reset a qubit is obtained by coupling the q…
Phase protection of Fano-Feshbach resonances
Alexander Blech, Yuval Shagam, Nicolas Hölsch +8
Decay of bound states due to coupling with free particle states is a general phenomenon occurring at energy scales from MeV in nuclear physics to peV in ultracold atomic gases. Suc…
Krotov: A Python implementation of Krotov's method for quantum optimal control
Michael H. Goerz, Daniel Basilewitsch, Fernando Gago-Encinas +4
We present a new open-source Python package, krotov, implementing the quantum optimal control method of that name. It allows to determine time-dependent external fields for a wide…
Optimized Sampling of Mixed-State Observables
Marec W. Heger, Christiane P. Koch, Daniel M. Reich
Quantum dynamical simulations of statistical ensembles pose a significant computational challenge due to the fact that mixed states need to be represented. If the underlying dynami…
Quantum Optimal Control for Mixed State Squeezing in Cavity Optomechanics
Daniel Basilewitsch, Christiane P. Koch, Daniel M. Reich
The performance of key tasks in quantum technology, such as accurate state preparation, can be maximized by utilizing external controls and deriving their shape with optimal contro…