390 citations · 5.4k across the 118 of their papers we have counts for
16 papers · 1 filter
Gate-based protocol simulations for quantum repeaters using quantum-dot molecules in switchable electric fields
Steffen Wilksen, Frederik Lohof, Isabell Willmann +6
Electrically controllable quantum-dot molecules (QDMs) are a promising platform for deterministic entanglement generation and, as such, a resource for quantum-repeater networks. We…
Signatures of dynamically dressed states
Katarina Boos, Sang Kyu Kim, Thomas Bracht +10
The interaction of a resonant light field with a quantum two-level system is of key interest both for fundamental quantum optics and quantum technological applications employing re…
Site-Selective Enhancement of Superconducting Nanowire Single-Photon Detectors via Local Helium Ion Irradiation
Stefan Strohauer, Fabian Wietschorke, Lucio Zugliani +9
Achieving homogeneous performance metrics between nominally identical pixels is challenging for the operation of arrays of superconducting nanowire single-photon detectors (SNSPDs)…
Extending the coherence time of spin defects in hBN enables advanced qubit control and quantum sensing
Roberto Rizzato, Martin Schalk, Stephan Mohr +10
Spin defects in hexagonal Boron Nitride (hBN) attract increasing interest for quantum technology since they represent optically-addressable qubits in a van der Waals material. In p…
Coherent Dynamics of the Swing-Up Excitation Technique
Katarina Boos, Friedrich Sbresny, Sang Kyu Kim +9
Developing coherent excitation methods for quantum emitters which enable high brightness, good single-photon purity and high indistinguishability of the emitted photons has been a…
The quantum dynamic range of room temperature spin imaging
Martin Schalk, Riccardo Silvioli, Karina Houska +8
Magnetic resonance imaging of spin systems combines scientific applications in medicine, chemistry and physics. Here, we investigate the pixel-wise coherent quantum dynamics of spi…
Two-Photon Interference of Single Photons from Dissimilar Sources
Christian Dangel, Jonas Schmitt, Anthony J. Bennett +2
Entanglement swapping and heralding are at the heart of many protocols for distributed quantum information. For photons, this typically involves Bell state measurements based on tw…
Three-photon excitation of quantum two-level systems
Viviana Villafañe, Bianca Scaparra, Manuel Rieger +8
We demonstrate that semiconductor quantum dots can be excited efficiently in a resonant three-photon process, whilst resonant two-photon excitation is highly suppressed. Time-depen…
High-resolution spectroscopy of a quantum dot driven bichromatically by two strong coherent fields
Chris Gustin, Lukas Hanschke, Katarina Boos +5
We present spectroscopic experiments and theory of a quantum dot driven bichromatically by two strong coherent lasers. In particular, we explore the regime where the drive strength…
Nonlinear quantum dot optomechanics
Matthias Weiß, Daniel Wigger, Maximilian Nägele +5
Wave mixing is an archetypical phenomenon in bosonic systems. In optomechanics, the bi-directional conversion between electromagnetic waves or photons at optical frequencies and el…
Quantum dot single photon sources with ultra-low multi-photon probability
Lukas Hanschke, Kevin A. Fischer, Stefan Appel +7
High-quality sources of single photons are of paramount importance for quantum communication, sensing and metrology. To these ends, resonantly excited two-level systems based on se…
Signatures of two-photon pulses from a quantum two-level system
Kevin A. Fischer, Lukas Hanschke, Jakob Wierzbowski +5
The theoretical community has found interest in the ability of a two-level atom to generate a strong many-body interaction with light under pulsed excitation. Single-photon generat…
Pulsed Rabi oscillations in quantum two-level systems: beyond the Area Theorem
Kevin A. Fischer, Lukas Hanschke, Malte Kremser +3
The Area Theorem states that when a short optical pulse drives a quantum two-level system, it undergoes Rabi oscillations in the probability of scattering a single photon. In this…
Emitters of -photon bundles
C. Sánchez Muñoz, E. del Valle, A. González Tudela +6
We propose a scheme based on the coherent excitation of a two-level system in a cavity to generate an ultrabright CW and focused source of quantum light that comes in groups (bundl…
Lasing in Strong Coupling
F. P. Laussy, E. del Valle, J. J. Finley
An almost ideal thresholdless laser can be realized in the strong-coupling regime of light-matter interaction, with Poissonian fluctuations of the field at all pumping powers and a…
Recent progress towards acoustically mediated carrier injection into individual nanostructures for single photon generation
Stefan Völk, Florian J. R. Schülein, Florian Knall +12
We report on recent progress towards single photon sources based on quantum dot and quantum post nanostructures which are manipulated using surface acoustic waves. For this concept…