Zobrazeno 1 - 10
of 191
pro vyhledávání: '"Gunnar Björk"'
Publikováno v:
New Journal of Physics, Vol 17, Iss 4, p 043040 (2015)
The orbital momentum of optical or radio waves can be used as a degree of freedom to transmit information. However, mainly for technical reasons, this degree of freedom has not been widely used in communication channels. The question is if this degre
Externí odkaz:
https://doaj.org/article/fbf83ecbe74d45128e69adc58741d5e8
Autor:
Gunnar Björk, Saroosh Shabbir
Publikováno v:
New Journal of Physics, Vol 16, Iss 1, p 013006 (2014)
Typically, quantum superpositions, and thus measurement projections of quantum states involving interference, decrease (or increase) monotonically as a function of increased distinguishability. Distinguishability, in turn, can be a consequence of dec
Externí odkaz:
https://doaj.org/article/7dbc0086b0d74179ba32cffc9533f817
Autor:
Gunnar Björk, Saroosh Shabbir
Publikováno v:
New Journal of Physics, Vol 16, Iss 11, p 118004 (2014)
We reiterate that a non-monotonic behavior of projection probabilities can occur for most states irrespective of the number of particles involved, based solely on the choice of the projectors chosen for measurement. We further clarify that, contrary
Externí odkaz:
https://doaj.org/article/de748942c9694c4dbd874690227c0d49
Publikováno v:
European Journal of Physics. 43:055401
Open-access, online quantum computers have shown significant improvements in the past decade. Although they still suffer from noise and scalability limitations, they do offer the possibility of experimenting with quantum circuits which would otherwis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba313e0dfa4041f1ddf3b78c84f1b26a
https://doi.org/10.1088/1361-6404/ac79e0
https://doi.org/10.1088/1361-6404/ac79e0
Autor:
Gunnar Björk, Gerd Leuchs, Andrei B. Klimov, Luis L. Sánchez-Soto, Markus Grassl, Pablo de la Hoz, Aaron Z. Goldberg
We comprehensively review the quantum theory of the polarization properties of light. In classical optics, these traits are characterized by the Stokes parameters, which can be geometrically interpreted using the Poincar\'e sphere. Remarkably, these
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::686036304ae33dd3361cff0a3dbcc631
http://arxiv.org/abs/2011.03979
http://arxiv.org/abs/2011.03979
Autor:
Gunnar Björk, Mattias Jönsson
Publikováno v:
Physical Review A. 101
We derive a computationally efficient expression of the photon counting distribution for a uniformly illuminated array of single photon detectors. The expression takes the number of single detectors, their quantum efficiency, and their dark-count rat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::172ca51c6605dbba0e4121b3d7ba5e6a
https://doi.org/10.1103/physreva.101.013815
https://doi.org/10.1103/physreva.101.013815
We present an experimental realization of a 16 element, temporal-array, photon-number-resolving (PNR) detector, which is a multiplexed single-photon detector that splits an input signal over multiple time-bins, and the time-bins are detected using tw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bd0bfd486947a823eedfbb50b053baf
Autor:
Mattias Jönsson, Gunnar Björk
Publikováno v:
Physical Review A. 99
We analyze the performance of photon-number-resolving (PNR) detectors and introduce a figure of merit for the accuracy of such detectors. This figure of merit is the (worst-case) probability that the photon-number-resolving detector correctly predict
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::741f1e05f97dfcd1aac08a4d4d13b87f
https://doi.org/10.1103/physreva.99.043822
https://doi.org/10.1103/physreva.99.043822
Publikováno v:
Journal of Lightwave Technology. 34:3317-3322
Recently one of us proposed a new formalism for modeling electromagnetic wave transformations for coherent communication using a real, four-vector description instead of the conventionally used Jones calculus or the Mueller matrices. The four-vector
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15482957f135fe842a46f95e46fec4ae
https://doi.org/10.1109/jlt.2016.2574912
https://doi.org/10.1109/jlt.2016.2574912