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of 22
pro vyhledávání: '"Seyfarth, Ulrich"'
We propose a practical recipe to compute the ${s}$-parametrized maps for systems with $SU(1,1)$ symmetry using a connection between the ${Q}$ and ${P} $ symbols through the action of an operator invariant under the group. The particular case of the s
Externí odkaz:
http://arxiv.org/abs/2012.02993
Autor:
Seyfarth, Ulrich
The thesis is mainly about the construction and implementation of cyclic mutually unbiased bases, dealing with different entanglement structures by discussing the related group structures. A recursive construction for Fermat number dimensions is give
Externí odkaz:
http://arxiv.org/abs/1907.02726
The modes of the electromagnetic field are solutions of Maxwell's equations taking into account the material boundary conditions. The field modes of classical optics - properly normalized - are also the mode functions of quantum optics. Quantum physi
Externí odkaz:
http://arxiv.org/abs/1411.3765
Mutually unbiased bases that can be cyclically generated by a single unitary operator are of special interest, since they can be readily implemented in practice. We show that, for a system of qubits, finding such a generator can be cast as the proble
Externí odkaz:
http://arxiv.org/abs/1404.3035
Autor:
Seyfarth, Ulrich, Ranade, Kedar S.
Publikováno v:
Phys. Rev. A 84, 042327 (2011)
For the complete estimation of arbitrary unknown quantum states by measurements, the use of mutually unbiased bases has been well-established in theory and experiment for the past 20 years. However, most constructions of these bases make heavy use of
Externí odkaz:
http://arxiv.org/abs/1106.3515
Autor:
Seyfarth, Ulrich, Ranade, Kedar S.
We relate the construction of a complete set of cyclic mutually unbiased bases, i. e., mutually unbiased bases generated by a single unitary operator, in power-of-two dimensions to the problem of finding a symmetric matrix over F_2 with an irreducibl
Externí odkaz:
http://arxiv.org/abs/1104.0202
Publikováno v:
J. Phys. A: Math. Theor. 43 (2010), 275305
We present a construction method for complete sets of cyclic mutually unbiased bases (MUBs) in Hilbert spaces of even prime power dimensions. In comparison to usual complete sets of MUBs, complete cyclic sets possess the additional property of being
Externí odkaz:
http://arxiv.org/abs/0912.4661
Autor:
Seyfarth, Ulrich
We expand the recently discussed continuous-variable quantum key distribution scheme of Heid and Luetkenhaus (2006) to qudits with a lossy but noiseless quantum channel. Postselection methods are used. Secret key rates are calculated in the presence
Externí odkaz:
http://arxiv.org/abs/0903.1955
Publikováno v:
Quantum Optics and Nanophotonics, 2017, ill.
Externí odkaz:
https://doi.org/10.1093/oso/9780198768609.003.0004
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