856 citations
- J. Fynbo3 profiles14 · h 60
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5 papers · 2 filters
Atomic quantum superposition state generation via optical probing
Anne E. B. Nielsen, Uffe V. Poulsen, Antonio Negretti +1
We analyze the performance of a protocol to prepare an atomic ensemble in a superposition of two macroscopically distinguishable states. The protocol relies on conditional measurem…
Quantum fluctuations in the image of a Bose gas
Antonio Negretti, Carsten Henkel, Klaus Molmer
We analyze the information content of density profiles for an ultracold Bose gas of atoms and extract resolution limits for observables contained in these images. Our starting poin…
The distribution of quantum fidelities
Line Hjortshoj Pedersen, Niels Martin Moller, Klaus Molmer
When applied to different input states, an imperfect quantum operation yields output states with varying fidelities, defined as the absolute square of their overlap with the desire…
Dynamical programming of continuously observed quantum systems
Viacheslav P. Belavkin, Antonio Negretti, Klaus Molmer
We develop dynamical programming methods for the purpose of optimal control of quantum states with convex constraints and concave cost and bequest functions of the quantum state. W…
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…