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pro vyhledávání: '"Ahrens, Johan"'
Autor:
Ahrens, Johan
This PhD-thesis is based on the five experiments I have performed during mytime as a PhD-student. Three experiments are implementations of non-contextualinequalities and two are implementations of witness functions for classical- andquantum dimension
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-116832
Autor:
Jogenfors, Jonathan, Elhassan, Ashraf M., Ahrens, Johan, Bourennane, Mohamed, Larsson, Jan-Åke
Publikováno v:
Science Advances 18 Dec 2015: Vol. 1, no. 11, e1500793
Photonic systems based on energy-time entanglement have been proposed to test local realism using the Bell inequality. A violation of this inequality normally also certifies security of device-independent quantum key distribution, so that an attacker
Externí odkaz:
http://arxiv.org/abs/1411.7222
Publikováno v:
Phys. Rev. Lett. 113, 250403 (2014)
Contextuality is a fundamental property of quantum theory and a critical resource for quantum computation. Here, we experimentally observe the arguably cleanest form of contextuality in quantum theory [A. Cabello \emph{et al.}, Phys. Rev. Lett. \text
Externí odkaz:
http://arxiv.org/abs/1408.6763
Publikováno v:
Phys. Rev. Lett. 112, 140401 (2014)
We report on an experimental test of classical and quantum dimension. We have used a dimension witness which can distinguish between quantum and classical systems of dimension 2,3 and 4 and performed the experiment for all five cases. The witness we
Externí odkaz:
http://arxiv.org/abs/1309.5339
We report two fundamental experiments on three-level quantum systems (qutrits). The first one tests the simplest task for which quantum mechanics provides an advantage with respect to classical physics. The quantum advantage is certified by the viola
Externí odkaz:
http://arxiv.org/abs/1301.2887
Publikováno v:
Nature Physics 8, (2012) 592
A fundamental resource in any communication and computation task is the amount of information that can be transmitted and processed. Information encoded in a classical system is limited by the dimension d_c of the system, i.e., the number of distingu
Externí odkaz:
http://arxiv.org/abs/1111.1277
Publikováno v:
In Optics Communications 2009 282(6):1231-1236
Publikováno v:
Nature Physics. Aug2012, Vol. 8 Issue 8, p592-595. 4p. 2 Diagrams, 1 Chart, 1 Graph.
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