Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Michael Cosacchi"'
Autor:
Mathieu Bozzio, Michal Vyvlecka, Michael Cosacchi, Cornelius Nawrath, Tim Seidelmann, Juan C. Loredo, Simone L. Portalupi, Vollrath M. Axt, Peter Michler, Philip Walther
Publikováno v:
npj Quantum Information, Vol 8, Iss 1, Pp 1-8 (2022)
Abstract Quantum cryptography harnesses quantum light, in particular single photons, to provide security guarantees that cannot be reached by classical means. For each cryptographic task, the security feature of interest is directly related to the ph
Externí odkaz:
https://doaj.org/article/44734785b9544f74aa398fbd5caa8aaf
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:
Moritz Cygorek, Michael Cosacchi, Alexei Vagov, Vollrath Martin Axt, Brendon W. Lovett, Jonathan Keeling, Erik M. Gauger
Publikováno v:
Nature Physics. 18:662-668
Funding: M. Co. and V. M. A. are grateful for funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under project No. 419036043. A. V. acknowledges the support from the Russian Science Foundation under the Project 18-12-004
Autor:
Miriam Neumann, Tim Seidelmann, Florian Kappe, Thomas K. Bracht, Vollrath M. Axt, Michael Cosacchi, Doris E. Reiter, Gregor Weihs
Publikováno v:
Physical Review B. 104
When a detuned and strong laser pulse acts on an optical transition, a Stark shift of the corresponding energies occurs. We analyze how this optical Stark effect can be used to prepare and control the dark exciton occupation in a semiconductor quantu
Using a density-functional-theory-based approach, we explore the symmetrization and proton dynamics in ice-VII, for which recent high-pressure NMR experiments indicate significant proton dynamics in the pressure-range of $20-95$ GPa. We directly samp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4947a17795b91f48031a234869ee3a5f
Autor:
Tim Seidelmann, Michael Cosacchi, J. Wiercinski, Moritz Cygorek, Vollrath M. Axt, Doris E. Reiter, A. Vagov
Publikováno v:
Physical Review Research. 2
The on-demand preparation of higher-order Fock states is of fundamental importance in quantum information sciences. We propose and compare different protocols to generate higher-order Fock states in solid state quantum-dot--cavity systems. The protoc
Autor:
Florian Ungar, Tim Seidelmann, Michael Cosacchi, Moritz Cygorek, Vollrath M. Axt, Alexei Vagov
We have simulated the time evolution of the photon number distribution in a semiconductor quantum dot-microcavity system driven by chirped laser pulses and compare with unchirped results. When phonon interactions with the dot are disregarded - thus c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::272e155a7c4870c946f6c187fa47e0af
http://arxiv.org/abs/2003.03974
http://arxiv.org/abs/2003.03974
Bell states are the most prominent maximally entangled photon states. In a typical four-level emitter, like a semiconductor quantum dot, the photon states exhibit only one type of Bell state entanglement. By adding an external driving to the emitter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::125d5a7bc4751ea18ad0548f0a265c95
Publikováno v:
Applied Physics Letters. 118:164001
The cascaded decay in a four-level quantum emitter is a well established mechanism to generate polarization entangled photon pairs, the building blocks of many applications in quantum technologies. The four most prominent maximally entangled photon p
We demonstrate theoretically that the single-photon purity of photons emitted from a quantum dot exciton prepared by phonon-assisted off-resonant excitation can be significantly higher in a wide range of parameters than that obtained by resonant prep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db69bc234969a5ea3173eacae3d6a2ab
http://arxiv.org/abs/1902.06132
http://arxiv.org/abs/1902.06132