1.3k citations · 7k across the 58 of their papers we have counts for
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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…
Two-stage, low noise quantum frequency conversion of single photons from silicon-vacancy centers in diamond to the telecom C-band
Marlon Schäfer, Benjamin Kambs, Dennis Herrmann +2
The silicon-vacancy center in diamond holds great promise as a qubit for quantum communication networks. However, since the optical transitions are located within the visible red s…
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…
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…
Optical properties of SiV and GeV color centers in nanodiamonds under hydrostatic pressures up to 180 GPa
Baptiste Vindolet, Marie-Pierre Adam, Loïc Toraille +14
We investigate the optical properties of silicon-vacancy (SiV) and germanium-vacancy (GeV) color centers in nanodiamonds under hydrostatic pressure up to 180 GPa. The nanodiamonds…
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…
Coherence of a charge stabilised tin-vacancy spin in diamond
Johannes Görlitz, Dennis Herrmann, Philipp Fuchs +8
Quantum information processing (QIP) with solid state spin qubits strongly depends on the efficient initialisation of the qubit's desired charge state. While the negatively charged…
A cavity-based optical antenna for color centers in diamond
Philipp Fuchs, Thomas Jung, Michael Kieschnick +2
An efficient atom-photon-interface is a key requirement for the integration of solid-state emitters such as color centers in diamond into quantum technology applications. Just like…
Extending Quantum Links: Modules for Fiber- and Memory-Based Quantum Repeaters
Peter van Loock, Wolfgang Alt, Christoph Becher +9
We analyze elementary building blocks for quantum repeaters based on fiber channels and memory stations. Implementations are considered for three different physical platforms, for…
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…
Spectroscopic Investigations of Negatively Charged Tin-Vacancy Centres in Diamond
Johannes Görlitz, Dennis Herrmann, Gergő Thiering +9
The recently discovered negatively charged tin-vacancy centre in diamond is a promising candidate for applications in quantum information processing (QIP). We here present a detail…
Spin Measurements of NV Centers Coupled to a Photonic Crystal Cavity
Thomas Jung, Johannes Görlitz, Benjamin Kambs +9
Nitrogen-vacancy (NV) centers feature outstanding properties like a spin coherence time of up to one second as well as a level structure offering the possibility to initialize, coh…
Origin of nonclassical light emission from defects in multi-layer hexagonal boron nitride
Alexander Bommer, Christoph Becher
In recent years, mono-layers and multi-layers of hexagonal boron nitride (hBN) have been demonstrated as host materials for localized atomic defects that can be used as emitters fo…
Limitations on the indistinguishability of photons from remote solid state sources
Benjamin Kambs, Christoph Becher
In the present work, we derive a formalism that can be used to predict and interpret the time structure and achievable visibilities for two-photon interference (TPI) experiments us…
Strongly inhomogeneous distribution of spectral properties of silicon-vacancy color centers in nanodiamonds
Sarah Lindner, Alexander Bommer, Andreas Muzha +7
The silicon-vacancy (SiV) color center in diamond is a solid-state single photon emitter and spin quantum bit suited as a component in quantum devices. Here, we show that the SiV c…
Coherent control and wave mixing in an ensemble of silicon vacancy centers in diamond
Christian Weinzetl, Johannes Görlitz, Jonas Nils Becker +4
Strong light-matter interactions are critical for quantum technologies based on light, such as memories or nonlinear interactions. Solid state materials will be particularly import…
Two-photon interference in the telecom C-band after frequency conversion of photons from remote quantum emitters
Jonas H. Weber, Benjamin Kambs, Jan Kettler +7
Efficient fiber-based long-distance quantum communication via quantum repeaters relies on deterministic single-photon sources at telecom wavelengths, with the potential to exploit…
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 properties and quantum control of silicon vacancy color centers in diamond
Jonas Nils Becker, Christoph Becher
Atomic-scale impurity spins, also called color centers, in an otherwise spin-free diamond host lattice have proven to be versatile tools for applications in solid-state-based quant…
All-optical control of the silicon-vacancy spin in diamond at millikelvin temperatures
Jonas Nils Becker, Benjamin Pingault, David Groß +7
The silicon-vacancy center in diamond offers attractive opportunities in quantum photonics due to its favorable optical properties and optically addressable electronic spin. Here,…
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…
Coherent control of the silicon-vacancy spin in diamond
Benjamin Pingault, David-Dominik Jarausch, Christian Hepp +5
Spin impurities in diamond have emerged as a promising building block in a wide range of solid-state-based quantum technologies. The negatively charged silicon-vacancy centre combi…
Cavity-enhanced single photon source based on the silicon vacancy center in diamond
Julia Benedikter, Hanno Kaupp, Thomas Hümmer +7
Single photon sources are an integral part of various quantum technologies, and solid state quantum emitters at room temperature appear as a promising implementation. We couple the…
Photoluminescence excitation and spectral hole burning spectroscopy of silicon vacancy centers in diamond
Carsten Arend, Jonas Nils Becker, Hadwig Sternschulte +2
Silicon-vacancy (SiV) centers in diamond are promising systems for quantum information applications due to their bright single photon emission and optically accessible spin states.…