Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Andreas M. Barth"'
Autor:
Moritz Cygorek, Andreas M. Barth, Tim Seidelmann, Vollrath M. Axt, Florian Ungar, Alexei Vagov, Tilmann Kuhn
Publikováno v:
Physical Review B. 99
We investigate the degree of entanglement quantified by the concurrence of photon pairs that are simultaneously emitted in the biexciton-exciton cascade from a quantum dot in a cavity. Four dot-cavity configurations are compared that differ with resp
Publikováno v:
Physical Review B. 99
Autor:
Alexei Vagov, Florian Ungar, Moritz Cygorek, Vollrath M. Axt, Tilmann Kuhn, Andreas M. Barth, Tim Seidelmann
We report on simulations of the degree of polarization entanglement of photon pairs simultaneously emitted from a quantum dot-cavity system that demand revisiting the role of phonons. Since coherence is a fundamental precondition for entanglement and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a2ce0e2892f6f587a337df098c68078
http://arxiv.org/abs/1902.04933
http://arxiv.org/abs/1902.04933
Autor:
Michael Cosacchi, Alexei Vagov, Moritz Cygorek, Florian Ungar, Andreas M. Barth, Vollrath M. Axt
Using a real-time path integral approach we develop an algorithm to calculate multi-time correlation functions of open few-level quantum systems that is applicable to highly nonequilibrium dynamics. The calculational scheme fully keeps the non-Markov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3060609e7d503594c77a4a840e329f0f
http://arxiv.org/abs/1806.11203
http://arxiv.org/abs/1806.11203
Autor:
Andreas M. Barth, Florian Ungar, Moritz Cygorek, Alexei Vagov, Vollrath M. Axt, Tim Seidelmann, Tilmann Kuhn
We compare three different notions of concurrence to measure the polarization entanglement of two-photon states generated by the biexciton cascade in a quantum dot embedded in a microcavity. We focus on the often-discussed situation of a dot with fin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95d6e76c3c3c2f9585e5787ef2d6e30c
http://arxiv.org/abs/1712.02584
http://arxiv.org/abs/1712.02584
Publikováno v:
Physical Review B. 96
The generation of photons in a microcavity coupled to a laser-driven quantum dot interacting with longitudinal acoustic (LA) phonons is studied in the regime of simultaneously strong driving and strong dot-cavity coupling. The stationary cavity photo
Publikováno v:
Physical Review B. 96
We present a numerical path-integral iteration scheme for the low-dimensional reduced density matrix of a time-dependent quantum dissipative system. Our approach simultaneously accounts for the combined action of a microscopically modeled pure-dephas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf6304e861edc70c4324a6088d7835f9
http://arxiv.org/abs/1607.00222
http://arxiv.org/abs/1607.00222
Autor:
Vollrath M. Axt, Andreas M. Barth, M. S. Skolnick, A. M. Fox, L.M.P.P. Martins, J. H. Quilter, Feng Liu, Alistair J. Brash
Publikováno v:
ResearcherID
We demonstrate ultrafast incoherent depopulation of a quantum dot from above to below the transparency point using LA-phonon-assisted emission stimulated by a redshifted laser pulse. The QD is turned from a weakly vibronic system into a strongly vibr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba41dbbc701ab62ee1b0a56859c5693b
http://arxiv.org/abs/1602.00628
http://arxiv.org/abs/1602.00628
Autor:
Andreas M. Barth, Sebastian Lüker, Doris E. Reiter, Alexei Vagov, Vollrath M. Axt, Tilmann Kuhn
We investigate theoretically the temporal behavior of a quantum dot under off-resonant optical excitation targeted at fast acoustic phonon-assisted state preparation. We demonstrate that in a preparation process driven by short laser pulses, three pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31d2bca01e9e14d33402df7f1f07bac1