104 citations · 364 across the 15 of their papers we have counts for
15 papers
Climbing the Fock ladder: Advancing multiphoton state generation
M. Engelkemeier, J. Sperling, J. Tiedau +5
A scheme for the enhanced generation of higher photon-number states is realized, using an optical time-multiplexing setting that exploits a parametric down-conversion source for an…
Statistical Benchmarking of Scalable Photonic Quantum Systems
Johannes Tiedau, Melanie Engelkemeier, Benjamin Brecht +2
Targeting at the realization of scalable photonic quantum technologies, the generation of many photons, their propagation in large optical networks, and a subsequent detection and…
Local versus Global Two-Photon Interference in Quantum Networks
Thomas Nitsche, Syamsundar De, Sonja Barkhofen +6
We devise an approach to characterizing the intricate interplay between classical and quantum interference of two-photon states in a network, which comprises multiple time-bin mode…
Single-channel electronic readout of a multipixel superconducting nanowire single photon detector
Johannes Tiedau, Timon Schapeler, Vikas Anant +3
We present a time-over-threshold readout technique to count the number of activated pixels from an array of superconducting nanowire single photon detectors (SNSPDs). This techniqu…
Pure Single Photons from Scalable Frequency Multiplexing
T. Hiemstra, T. F. Parker, P. C. Humphreys +7
We demonstrate multiphoton interference using a resource-efficient frequency multiplexing scheme, suitable for quantum information applications that demand multiple indistinguishab…
Wave-particle duality revisited: Neither wave nor particle
Jan Sperling, Syamsundar De, Thomas Nitsche +4
A textbook interpretation of quantum physics is that quantum objects can be described in a particle or a wave picture, depending on the operations and measurements performed. Beyon…
Distillation of Squeezing using a pulsed engineered PDC source
Thomas Dirmeier, Johannes Tiedau, Imran Khan +5
Hybrid quantum information processing combines the advantages of discrete and continues variable protocols by realizing protocols consisting of photon counting and homodyne measure…
On the scalability of parametric down-conversion for generating higher-order Fock states
Johannes Tiedau, Tim J. Bartley, Georg Harder +4
Spontaneous parametric down-conversion (SPDC) is the most widely-used method to generate higher-order Fock states (). Yet, a consistent performance analysis from fundament…
A high dynamic range optical detector for measuring single photons and bright light
Johannes Tiedau, Evan Meyer-Scott, Thomas Nitsche +3
Detecting light is fundamental to all optical experiments and applications. At the single photon level, the quantised nature of light requires specialised detectors, which typicall…
Incomplete Detection of Nonclassical Phase-Space Distributions
M. Bohmann, J. Tiedau, T. Bartley +3
We implement the direct sampling of negative phase-space functions via unbalanced homodyne measurement using click-counting detectors. The negativities significantly certify noncla…
Trading quantum states for temporal profiles: tomography by the overlap
Johannes Tiedau, Valery S. Shchesnovich, Dmitri Mogilevtsev +5
Quantum states and the modes of the optical field they occupy are intrinsically connected. Here, we show that one can trade the knowledge of a quantum state to gain information abo…
Limits on the heralding efficiencies and spectral purities of spectrally-filtered single photons from photon pair sources
Evan Meyer-Scott, Nicola Montaut, Johannes Tiedau +4
Photon pairs produced by parametric down-conversion or four-wave mixing can interfere with each other in multiport interferometers, or carry entanglement between distant nodes for…
Limits of the time-multiplexed photon-counting method
Regina Kruse, Johannes Tiedau, Tim J. Bartley +2
The progress in building large quantum states and networks requires sophisticated detection techniques to verify the desired operation. To achieve this aim, a cost- and resource-ef…
Extracting the physical sector of quantum states
Dmitri Mogilevtsev, Yong-Siah Teo, Jaroslav Rehacek +6
The physical nature of any quantum source guarantees the existence of an effective Hilbert space of finite dimension, the physical sector, in which its state is completely characte…
Discorrelated quantum states
Evan Meyer-Scott, Johannes Tiedau, Georg Harder +2
The statistical properties of photons are fundamental to investigating quantum mechanical phenomena using light. In multi-photon, two-mode systems, correlations may exist between o…