Zobrazeno 1 - 10
of 125
pro vyhledávání: '"Tobias Heindel"'
Autor:
Paweł Holewa, Daniel A. Vajner, Emilia Zięba-Ostój, Maja Wasiluk, Benedek Gaál, Aurimas Sakanas, Marek Burakowski, Paweł Mrowiński, Bartosz Krajnik, Meng Xiong, Kresten Yvind, Niels Gregersen, Anna Musiał, Alexander Huck, Tobias Heindel, Marcin Syperek, Elizaveta Semenova
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-9 (2024)
Abstract Single indistinguishable photons at telecom C-band wavelengths are essential for quantum networks and the future quantum internet. However, high-throughput technology for single-photon generation at 1550 nm remained a missing building block
Externí odkaz:
https://doaj.org/article/271a4093196c4cfab24b02713667ef11
Autor:
Yusuf Karli, Daniel A. Vajner, Florian Kappe, Paul C. A. Hagen, Lena M. Hansen, René Schwarz, Thomas K. Bracht, Christian Schimpf, Saimon F. Covre da Silva, Philip Walther, Armando Rastelli, Vollrath Martin Axt, Juan C. Loredo, Vikas Remesh, Tobias Heindel, Doris E. Reiter, Gregor Weihs
Publikováno v:
npj Quantum Information, Vol 10, Iss 1, Pp 1-9 (2024)
Abstract Quantum communication networks rely on quantum cryptographic protocols including quantum key distribution (QKD) based on single photons. A critical element regarding the security of QKD protocols is the photon number coherence (PNC), i.e., t
Externí odkaz:
https://doaj.org/article/4e9290a12e6a4484a0ee39c2be930cd3
Publikováno v:
npj 2D Materials and Applications, Vol 7, Iss 1, Pp 1-9 (2023)
Abstract To date, quantum communication widely relies on attenuated lasers for secret key generation. In future quantum networks, fundamental limitations resulting from their probabilistic photon distribution must be overcome by using deterministic q
Externí odkaz:
https://doaj.org/article/eb87b427241348c8aa3c79207bd372ab
Autor:
Thomas K. Bracht, Michael Cosacchi, Tim Seidelmann, Moritz Cygorek, Alexei Vagov, V. Martin Axt, Tobias Heindel, Doris E. Reiter
Publikováno v:
PRX Quantum, Vol 2, Iss 4, p 040354 (2021)
The controlled preparation of the excited state in a quantum emitter is a prerequisite for its usage as a single-photon source—a key building block for quantum technologies. In this paper, we propose a coherent excitation scheme using off-resonant
Externí odkaz:
https://doaj.org/article/2bd08c5c0eda47929821d680cd9f38f8
Autor:
Tobias Heindel, Alexander Thoma, Ido Schwartz, Emma R. Schmidgall, Liron Gantz, Dan Cogan, Max Strauß, Peter Schnauber, Manuel Gschrey, Jan-Hindrik Schulze, Andre Strittmatter, Sven Rodt, David Gershoni, Stephan Reitzenstein
Publikováno v:
APL Photonics, Vol 2, Iss 12, Pp 121303-121303-7 (2017)
The dark exciton state in semiconductor quantum dots (QDs) constitutes a long-lived solid-state qubit which has the potential to play an important role in implementations of solid-state-based quantum information architectures. In this work, we exploi
Externí odkaz:
https://doaj.org/article/bbc35c4fdc8547b682f21c9439d37276
Autor:
Martin von Helversen, Jonas Böhm, Marco Schmidt, Manuel Gschrey, Jan-Hindrik Schulze, André Strittmatter, Sven Rodt, Jörn Beyer, Tobias Heindel, Stephan Reitzenstein
Publikováno v:
New Journal of Physics, Vol 21, Iss 3, p 035007 (2019)
Quantum-light sources based on semiconductor quantum dots (QDs) are promising candidates for many applications in quantum photonics and quantum communication. Important emission characteristics of such emitters, namely the single-photon purity and ph
Externí odkaz:
https://doaj.org/article/f41109c226a84505b38a07c7070a633a
Autor:
Andrei Dorman, Tobias Heindel
Publikováno v:
Electronic Proceedings in Theoretical Computer Science, Vol 59, Iss Proc. ICE 2011, Pp 37-51 (2011)
Process calculi and graph transformation systems provide models of reactive systems with labelled transition semantics. While the semantics for process calculi is compositional, this is not the case for graph transformation systems, in general. Hence
Externí odkaz:
https://doaj.org/article/88ab870522154841954c077764079461
Autor:
Tobias Heindel
Publikováno v:
Electronic Proceedings in Theoretical Computer Science, Vol 32, Iss Proc. SOS 2010, Pp 26-41 (2010)
Inspired by decomposition problems in rule-based formalisms in Computational Systems Biology and recent work on compositionality in graph transformation, this paper proposes to use arbitrary colimits to "deconstruct" models of reactions in which stat
Externí odkaz:
https://doaj.org/article/7e9a7370ecdc456dad90f25ba6d77431
Autor:
Peter Schnauber, Alexander Thoma, Christoph V. Heine, Alexander Schlehahn, Liron Gantz, Manuel Gschrey, Ronny Schmidt, Caspar Hopfmann, Benjamin Wohlfeil, Jan-Hindrick Schulze, André Strittmatter, Tobias Heindel, Sven Rodt, Ulrike Woggon, David Gershoni, Stephan Reitzenstein
Publikováno v:
Technologies, Vol 4, Iss 1, p 1 (2015)
We report on enhancing the photon-extraction efficiency (PEE) of deterministic quantum dot (QD) microlenses via anti-reflection (AR) coating. The AR-coating deposited on top of the curved microlens surface is composed of a thin layer of Ta2O5, and is
Externí odkaz:
https://doaj.org/article/4e537bc2b40a4973810bdc8c95467831
Autor:
Pawel Sobocinski, Tobias Heindel
Publikováno v:
Logical Methods in Computer Science, Vol Volume 7, Issue 1 (2011)
Colimits that satisfy the Van Kampen condition have interesting exactness properties. We show that the elementary presentation of the Van Kampen condition is actually a characterisation of a universal property in the associated bicategory of spans. T
Externí odkaz:
https://doaj.org/article/63e2e3753f2d45c48a4d85ce35d32c87