993 citations · 8.8k across the 123 of their papers we have counts for
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Multi-ion frequency reference using dynamical decoupling
Lennart Pelzer, Kai Dietze, Víctor J. Martínez-Lahuerta +6
We present the experimental realization of a continuous dynamical decoupling scheme which suppresses leading frequency shifts in a multi-ion frequency reference based on $^{40}\mat…
Quantum retrodiction in Gaussian systems and applications in optomechanics
Jonas Lammers, Klemens Hammerer
What knowledge can be obtained from the record of a continuous measurement about the quantum state the measured system was in at the beginning of the measurement? The task of quant…
Macroscopic quantum entanglement between an optomechanical cavity and a continuous field in presence of non-Markovian noise
Su Direkci, Klemens Winkler, Corentin Gut +3
Probing quantum entanglement with macroscopic objects allows us to test quantum mechanics in new regimes. One way to realize such behavior is to couple a macroscopic mechanical osc…
Optimal Ramsey interferometry with echo protocols based on one-axis twisting
Maja S. Scharnagl, Timm Kielinski, Klemens Hammerer
We study a variational class of generalised Ramsey protocols that include two one-axis twisting (OAT) operations, one performed before the phase imprint and the other after. In thi…
Accurate and efficient Bloch-oscillation-enhanced atom interferometry
Florian Fitzek, Jan-Niclas Kirsten-Siemß, Ernst M. Rasel +2
Bloch oscillations of atoms in optical lattices are a powerful technique that can boost the sensitivity of atom interferometers to a wide range of signals by large momentum transfe…
Sideband thermometry of ion crystals
Ivan Vybornyi, Laura S. Dreissen, Dominik Kiesenhofer +7
Coulomb crystals of cold trapped ions are a leading platform for the realisation of quantum processors and quantum simulations and, in quantum metrology, for the construction of op…