234 citations · 727 across the 13 of their papers we have counts for
13 papers · 1 filter
Collective enhancement in sideband cooling of ion crystals
Ivan Vybornyi, Artem Zhdanov, Matthias Bock +4
Low-entropy motional states of ion Coulomb crystals are an essential prerequisite for a plethora of applications and are typically prepared by laser cooling. As larger crystals are…
Long-lived quantum memory enabling atom-photon entanglement over 101 km telecom fiber
Yiru Zhou, Pooja Malik, Florian Fertig +6
Long-distance entanglement distribution is the key task for quantum networks, enabling applications such as secure communication and distributed quantum computing. Here we report o…
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…
Calibration-Independent Certification of a Quantum Frequency Converter
Matthias Bock, Pavel Sekatski, Jean-Daniel Bancal +5
We report on a method to certify a unitary operation with the help of source and measurement apparatuses whose calibration throughout the certification process needs not be trusted…
Controlling two-dimensional Coulomb crystals of more than 100 ions in a monolithic radio-frequency trap
Dominik Kiesenhofer, Helene Hainzer, Artem Zhdanov +4
Linear strings of trapped atomic ions held in radio-frequency (rf) traps constitute one of the leading platforms for quantum simulation experiments, allowing for the investigation…
Telecom Quantum Photonic Interface for a Ca Single-Ion Quantum Memory
Elena Arenskötter, Tobias Bauer, Stephan Kucera +3
Entanglement-based quantum networks require quantum photonic interfaces between stationary quantum memories and photons, enabling entanglement distribution. Here we present such a…
Correlation spectroscopy with multi-qubit-enhanced phase estimation
H. Hainzer, D. Kiesenhofer, T. Ollikainen +7
Ramsey interferometry is a widely used tool for precisely measuring transition frequencies between two energy levels of a quantum system, with applications in time-keeping, precisi…
Entangling single atoms over 33 km telecom fibre
Tim van Leent, Matthias Bock, Florian Fertig +10
Heralded entanglement between distant quantum memories is the key resource for quantum networks. Based on quantum repeater protocols, these networks will facilitate efficient large…
Long-distance distribution of atom-photon entanglement at telecom wavelength
Tim van Leent, Matthias Bock, Robert Garthoff +6
Entanglement between stationary quantum memories and photonic channels is the essential resource for future quantum networks. Together with entanglement distillation it will enable…
High-fidelity entanglement between a trapped ion and a telecom photon via quantum frequency conversion
Matthias Bock, Pascal Eich, Stephan Kucera +4
Entanglement between a stationary quantum system and a flying qubit is an essential ingredient of a quantum-repeater network. It has been demonstrated for trapped ions, trapped ato…
Coherence and Entanglement Preservation of Frequency-Converted Heralded Single Photons
Andreas Lenhard, José Brito, Matthias Bock +2
We report on quantum frequency conversion of near-infrared photons from a wavelength of 854nm to the telecommunication O-band at 1310nm with 8% overall conversion efficiency. Entan…
Quantum and classical telecommunication channel multiplexing
Andreas Lenhard, José Brito, Stephan Kucera +3
We demonstrate the multiplexing of a classical coherent and a quantum state of light in a single telecommunciation fiber. For this purpose we make use of spontaneous parametric dow…
Telecom-heralded single photon absorption by a single atom
Andreas Lenhard, Matthias Bock, Stephan Kucera +5
We present, characterize, and apply a photonic quantum interface between the near infrared and telecom spectral regions. A singly resonant optical parametric oscillator (OPO) opera…