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Statistical limits for quantum networks with semiconductor entangled photon sources

  • Jingzhong Yang, Michael Zopf, Pengji Li, Nand Lal Sharma, Weijie Nie, Frederik Benthin, Tom Fandrich, Eddy Patrick Rugeramigabo, Caspar Hopfmann, Robert Keil, Oliver G. Schmidt, Fei Ding

Semiconductor quantum dots are promising building blocks for quantum communication applications. Although deterministic, efficient, and coherent emission of entangled photons has been realized, implementing a practical quantum repeater remains outstanding.… Weiter »Statistical limits for quantum networks with semiconductor entangled photon sources

Entangling a Hole Spin with a Time-Bin Photon: A Waveguide Approach for Quantum Dot Sources of Multi-Photon Entanglement

  • Martin Hayhurst Appel, Alexey Tiranov, Simon Pabst, Ming Lai Chan, Christian Starup, Ying Wang, Leonardo Midolo, Konstantin Tiurev, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Anders Søndberg Sørensen, Peter Lodahl

Deterministic sources of multi-photon entanglement are highly attractive for quantum information processing but are challenging to realize experimentally. In this paper, we demonstrate a route towards a scaleable source of… Weiter »Entangling a Hole Spin with a Time-Bin Photon: A Waveguide Approach for Quantum Dot Sources of Multi-Photon Entanglement

On-chip spin-photon entanglement based on single-photon scattering

  • Ming Lai Chan, Alexey Tiranov, Martin Hayhurst Appel, Ying Wang, Leonardo Midolo, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Anders Søndberg Sørensen, Peter Lodahl

The realization of on-chip quantum gates between photons and solid-state spins is a key building block for quantum-information processors, enabling, e.g., distributed quantum computing, where remote quantum registers are interconnected… Weiter »On-chip spin-photon entanglement based on single-photon scattering

Quantum Interference of Identical Photons from Remote Quantum Dots

  • Liang Zhai, Giang N. Nguyen, Clemens Spinnler, Julian Ritzmann, Matthias C.Löbl, Andreas D. Wieck, Arne Ludwig, Alisa Javadi, Richard J. Warburton

Photonic quantum technology provides a viable route to quantum communication, quantum simulation, and quantum information processing. Recent progress has seen the realisation of boson sampling using 20 single-photons and quantum… Weiter »Quantum Interference of Identical Photons from Remote Quantum Dots

All-optical Tuning of Indistinguishable Single-Photons Generated in Three-level Quantum Systems

  • Łukasz Dusanowski, Chris Gustin, Stephen Hughes, Christian Schneider, and Sven Höfling

Resonance fluorescence of two-level quantum systems has emerged as a powerful tool in quantum information processing. Extension of this approach to higher-level systems provides new opportunities for quantum optics applications.… Weiter »All-optical Tuning of Indistinguishable Single-Photons Generated in Three-level Quantum Systems

Numerical optimization of single-mode fiber-coupled single-photon sources based on semiconductor quantum dots

  • Lucas Bremer, Carlos Jimenez, Simon Thiele, Ksenia Weber, Tobias Huber, Sven Rodt, Alois Herkommer, Sven Burger, Sven Höfling, Harald Giessen, Stephan Reitzenstein

We perform extended numerical studies to maximize the overall photon coupling efficiency of fiber-coupled quantum dot single-photon sources emitting in the near-infrared and telecom regime. Using the finite element method,… Weiter »Numerical optimization of single-mode fiber-coupled single-photon sources based on semiconductor quantum dots

Photoneutralization of charges in GaAs quantum dot based entangled photon emitters

  • Jingzhong Yang, Tom Fandrich, Frederik Benthin, Robert Keil, Nand Lal Sharma, Weijie Nie, Caspar Hopfmann, Oliver G. Schmidt, Michael Zopf, Fei Ding

Semiconductor-based emitters of pairwise photonic entanglement are a promising constituent of photonic quantum technologies. They are known for the ability to generate discrete photonic states on-demand with low multiphoton emission,… Weiter »Photoneutralization of charges in GaAs quantum dot based entangled photon emitters

Photoneutralization of charges in GaAs quantum dot based entangled photon emitters

  • Jingzhong Yang, Tom Fandrich, Frederik Benthin, Robert Keil, Nand Lal Sharma, Weijie Nie, Caspar Hopfmann, Oliver G. Schmidt, Michael Zopf, Fei Ding

Semiconductor-based emitters of pairwise photonic entanglement are a promising constituent of photonic quantum technologies. They are known for the ability to generate discrete photonic states on-demand with low multiphoton emission,… Weiter »Photoneutralization of charges in GaAs quantum dot based entangled photon emitters

Three-photon excitation of quantum two-level systems

  • Viviana Villafañe, Bianca Scaparra, Manuel Rieger, Stefan Appel, Rahul Trivedi, Tongtong Zhu, John Jarman, Rachel A. Oliver, Robert A. Taylor, Jonathan J. Finley, Kai Mueller

We demonstrate experimentally the long-standing fundamental theoretical prediction that quantum two-level systems can only be efficiently resonantly excited via multi-photon pulses involving an odd number of photons. This prediction can… Weiter »Three-photon excitation of quantum two-level systems