72 citations · 472 across the 22 of their papers we have counts for
21 papers
Experimental verification of bound and multiparticle entanglement with the randomized measurement toolbox
Chao Zhang, Yuan-Yuan Zhao, Nikolai Wyderka +10
In recent years, analysis methods for quantum states based on randomized measurements have been investigated extensively. Still, in the experimental implementations these methods w…
Characterizing crosstalk of superconducting transmon processors
Andreas Ketterer, Thomas Wellens
Currently available quantum computing hardware based on superconducting transmon architectures realizes networks of hundreds of qubits with the possibility of controlled nearest-ne…
Complete characterization of quantum correlations by randomized measurements
Nikolai Wyderka, Andreas Ketterer, Satoya Imai +5
The fact that quantum mechanics predicts stronger correlations than classical physics is an essential cornerstone of quantum information processing. Indeed, these quantum correlati…
Probing the geometry of correlation matrices with randomized measurements
Nikolai Wyderka, Andreas Ketterer
The generalized Bloch decomposition of a bipartite quantum state gives rise to a correlation matrix whose singular values provide rich information about non-local properties of the…
Quantifying multiparticle entanglement with randomized measurements
Sophia Ohnemus, Heinz-Peter Breuer, Andreas Ketterer
Randomized measurements constitute a simple measurement primitive that exploits the information encoded in the outcome statistics of samples of local quantum measurements defined t…
Statistically significant tests of multiparticle quantum correlations based on randomized measurements
Andreas Ketterer, Satoya Imai, Nikolai Wyderka +1
We consider statistical methods based on finite samples of locally randomized measurements in order to certify different degrees of multiparticle entanglement in intermediate-scale…
Non-Markovianity of Quantum Brownian Motion
Simon Einsiedler, Andreas Ketterer, Heinz-Peter Breuer
We study quantum non-Markovian dynamics of the Caldeira-Leggett model, a prototypical model for quantum Brownian motion describing a harmonic oscillator linearly coupled to a reser…
Entanglement characterization using quantum designs
Andreas Ketterer, Nikolai Wyderka, Otfried Gühne
We present in detail a statistical approach for the reference-frame-independent detection and characterization of multipartite entanglement based on moments of randomly measured co…
Entropic uncertainty relations from quantum designs
Andreas Ketterer, Otfried Gühne
In the course of the last decades entropic uncertainty relations have attracted much attention not only due to their fundamental role as manifestation of non-classicality of quantu…
Generation of time-frequency grid state with integrated biphoton frequency combs
N. Fabre, G. Maltese, F. Appas +8
Encoding quantum information in continuous variables is intrinsically faulty. Nevertheless, redundant qubits can be used for error correction, as proposed by Gottesman, Kitaev and…
Characterizing multipartite entanglement with moments of random correlations
Andreas Ketterer, Nikolai Wyderka, Otfried Gühne
The experimental detection of multipartite entanglement usually requires a number of appropriately chosen local quantum measurements which are aligned with respect to a previously…
Continuous-variable supraquantum nonlocality
Andreas Ketterer, Adrien Laversanne-Finot, Leandro Aolita
Supraquantum nonlocality refers to correlations that are more nonlocal than allowed by quantum theory but still physically conceivable in post-quantum theories, in the sense of res…
Free-Space Entangled Quantum Carpets
Mariana R. Barros, Andreas Ketterer, Osvaldo Jiménez Farías +1
The Talbot effect in quantum physics is known to produce intricate patterns in the probability distribution of a particle, known as "quantum carpets", corresponding to the revival…
General conditions for maximal violation of non-contextuality in discrete and continuous variables
A. Laversanne-Finot, A. Ketterer, M. R. Barros +4
The contextuality of quantum mechanics, i.e. the measurement outcome dependence upon previously made measurements, can be shown by the violation of inequalities based on measuremen…
Quantum information processing in phase space: A modular variables approach
A. Ketterer, A. Keller, S. P. Walborn +2
Binary quantum information can be fault tolerantly encoded in states defined in infinite dimensional Hilbert spaces. Such states define a computational basis, and permit a perfect…
Coherent inelastic backscattering of laser light from three isotropic atoms
Andreas Ketterer, Andreas Buchleitner, Vyacheslav N. Shatokhin
We study the impact of double and triple scattering contributions on coherent backscattering of laser light from saturated isotropic atoms, in the helicity preserving polarization…
Quantum search with modular variables
A. Ketterer, T. Douce, A. Keller +2
We give a dimension independent formulation of the quantum search algorithm introduced in [L. K. Grover, Phys. Rev. Lett. {\bf 79}, 325 (1997)]. This algorithm provides a quadratic…
Quantum information with modular variables
A. Ketterer, S. P. Walborn, A. Keller +2
We introduce a novel strategy, based on the use of modular variables, to encode and deterministically process quantum information using states described by continuous variables. Ou…
Quantum search with non--orthogonal entangled states
T. Douce, A. Ketterer, A. Keller +2
We propose a classical to quantum information encoding system using non--orthogonal states and apply it to the problem of searching an element in a quantum list. We show that the p…
Testing the Clauser-Horne-Shimony-Holt inequality using observables with arbitrary spectrum
A. Ketterer, A. Keller, T. Coudreau +1
The Clauser-Horne-Shimony and Holt inequality applies when measurements with binary outcomes are performed on physical systems under the assumption of local realism. Testing such i…
Continuous discretization of infinite dimensional Hilbert spaces
P. Vernaz-Gris, A. Ketterer, A. Keller +3
In quantum theory, observables with a continuous spectrum are known to be fundamentally different from those with a discrete and finite spectrum. While some fundamental tests and a…