44 citations · 52 across the 6 of their papers we have counts for
6 papers
Frequency-Resolved Simulations of Highly Entangled Biphoton States: Beyond the Single-Pair Approximation. II. Application to Entanglement-based Quantum Key Distribution
Philipp Kleinpaß, Thomas Walther, Erik Fitzke
We present time- and frequency-resolved simulations of quantum key distribution~(QKD) systems employing highly entangled biphoton quantum states. Our simulations are based on expan…
Frequency-Resolved Simulations of Highly Entangled Biphoton States: Beyond the Single-Pair Approximation. I. Theory
Philipp Kleinpaß, Thomas Walther, Erik Fitzke
We discuss an expansion of the detection probabilities of biphoton states in terms of increasing orders of the joint spectral amplitude. The expansion enables efficient time- or fr…
A flexible modular all-fiber based photon pair source for quantum key distribution in a network
Maximilian Tippmann, Erik Fitzke, Oleg Nikiforov +4
Entanglement-based QKD protocols require robust and stable photon pair sources in terms of high heralding efficiencies or photon pair generation rates even under harsh environmenta…
Reducing the number of single-photon detectors in quantum key distribution networks by time multiplexing
Jakob Kaltwasser, Joschka Seip, Erik Fitzke +2
We demonstrate a method to reduce the number of single-photon detectors (SPDs) required in multi-party quantum key distribution (QKD) networks by a factor of two by using detector…
Simulating the Photon Statistics of Multimode Gaussian States by Automatic Differentiation of Generating Functions
Erik Fitzke, Florian Niederschuh, Thomas Walther
Advances in photonics require photon-number resolved simulations of quantum optical experiments with Gaussian states. We demonstrate a simple and versatile method to simulate the p…
Stabilizing a Fabry-Perot etalon to 3 cm/s for spectrograph calibration
Christian Schwab, Julian Stuermer, Yulia V. Gurevich +4
We present a method of frequency stabilizing a broadband etalon that can serve as a high-precision wavelength calibrator for an Echelle spectrograph. Using a laser to probe the Dop…