240 citations · 1.9k across the 38 of their papers we have counts for
19 papers · 1 filter
Fast and efficient demultiplexing of single photons from a quantum dot with resonantly enhanced electro-optic modulators
Julian Münzberg, Franz Draxl, Saimon Filipe Covre da Silva +5
We report on a multi-photon source based on active demultiplexing of single photons emitted from a resonantly excited GaAs quantum dot. Active temporal-to-spatial mode demultipexin…
Photoneutralization of charges in GaAs quantum dot based entangled photon emitters
Jingzhong Yang, Tom Fandrich, Frederik Benthin +7
Semiconductor-based emitters of pairwise photonic entanglement are a promising constituent of photonic quantum technologies. They are known for the ability to generate discrete pho…
Statistical limits for quantum networks with semiconductor entangled photon sources
Jingzhong Yang, Michael Zopf, Pengji Li +9
Semiconductor quantum dots are promising building blocks for quantum communication applications. Although deterministic, efficient, and coherent emission of entangled photons has b…
Symmetry allows for distinguishability in totally destructive many-particle interference
Julian Münzberg, Christoph Dittel, Maxime Lebugle +4
We investigate, in a four photon interference experiment in a laser-written waveguide structure, how symmetries control the suppression of many-body output events of a unitar…
Approaching the Tsirelson bound with a Sagnac source of polarization-entangled photons
Sandra Meraner, Robert J. Chapman, Stefan Frick +3
High-fidelity polarization-entangled photons are a powerful resource for quantum communication, distributing entanglement and quantum teleportation. The Bell-CHSH inequality $S\leq…
Entanglement Swapping with Semiconductor-generated Photons
Michael Zopf, Robert Keil, Yan Chen +4
Transferring entangled states between photon pairs is essential for quantum communication technologies. Semiconductor quantum dots are the most promising candidate for generating p…
Totally Destructive Interference for Permutation-Symmetric Many-Particle States
Christoph Dittel, Gabriel Dufour, Mattia Walschaers +3
Several distinct classes of unitary mode transformations have been known to exhibit the strict suppression of a large set of transmission events, as a consequence of totally destru…
Totally Destructive Many-Particle Interference
Christoph Dittel, Gabriel Dufour, Mattia Walschaers +3
In a general, multi-mode scattering setup, we show how the permutation symmetry of a many-particle input state determines those scattering unitaries which exhibit strictly suppress…
Frequency Feedback for Two-Photon Interference from Separate Quantum Dots
Michael Zopf, Tobias Macha, Robert Keil +7
We employ active feedback to stabilize the frequency of single photons emitted by two separate quantum dots to an atomic standard. The transmission of a single, rubidium-based Fara…
Many-particle interference in a two-component bosonic Josephson junction: an all-optical simulation
Gabriel Dufour, Tobias Brünner, Christoph Dittel +3
We conceive an all-optical representation of the dynamics of two distinct types of interacting bosons in a double well by an array of evanescently coupled photonic waveguides. Many…
Solid-state ensemble of highly entangled photon sources at rubidium atomic transitions
Robert Keil, Michael Zopf, Yan Chen +4
Semiconductor InAs/GaAs quantum dots grown by the Stranski-Krastanov method are among the leading candidates for the deterministic generation of polarization entangled photon pairs…
Many-body quantum interference on hypercubes
Christoph Dittel, Robert Keil, Gregor Weihs
Beyond the regime of distinguishable particles, many-body quantum interferences influence quantum transport in an intricate manner. However, symmetries of the single-particle trans…
Obtaining tight bounds on higher-order interferences with a 5-path interferometer
Thomas Kauten, Robert Keil, Thomas Kaufmann +3
Within the established theoretical framework of quantum mechanics, interference always occurs between pairs of trajectories. Higher order interferences with multiple constituents a…
Implementation of Quantum and Classical Discrete Fractional Fourier Transforms
Steffen Weimann, Armando Perez-Leija, Maxime Lebugle +9
Fourier transforms are ubiquitous mathematical tools in basic and applied sciences. We here report classical and quantum optical realizations of the discrete fractional Fourier tra…
Experimental simulation of charge conservation violation and Majorana dynamics
R. Keil, C. Noh, A. Rai +4
Unphysical particles are commonly ruled out from the solution of physical equations, as they fundamentally cannot exist in any real system and, hence, cannot be examined experiment…
Quantum walks of correlated photon pairs in two-dimensional waveguide arrays
Konstantinos Poulios, Robert Keil, Daniel Fry +9
We demonstrate quantum walks of correlated photons in a 2D network of directly laser written waveguides coupled in a 'swiss cross' arrangement. The correlated detection events show…
Coherent Quantum Transport in Photonic Lattices
Armando Perez-Leija, Robert Keil, Alastair Kay +6
Transferring quantum states efficiently between distant nodes of an information processing circuit is of paramount importance for scalable quantum computing. We report on the first…
Tailoring the correlation and anti-correlation behavior of path-entangled photons in Glauber-Fock oscillator lattices
Armando Perez-Leija, Robert Keil, Alexander Szameit +3
We demonstrate that single-photon as well as biphoton revivals are possible in a new class of dynamic optical systems-the so-called Glauber-Fock oscillator lattices. In these array…
Classical analogue of displaced Fock states and quantum correlations in Glauber-Fock photonic lattices
Robert Keil, Armando Perez-Leija, Felix Dreisow +5
Coherent states and their generalisations, displaced Fock states, are of fundamental importance to quantum optics. Here we present a direct observation of a classical analogue for…