Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Jakóbczyk, Lech"'
We consider the possible quantum effect for infinite systems produced by variations of the Planck's constant. Using the algebraic formulation of quantum theory we study behaviour of states $\omega$ defined as positive, normalized functionals on the c
Externí odkaz:
http://arxiv.org/abs/1907.08644
Publikováno v:
Quantum Inf Process (2019) 18: 185
We present the complete solution of the problem of determination of trace-norm geometric discord for arbitrary two-qubit state. Final answer is achieved due to effective reduction of the problem to the study of critical points of certain mapping depe
Externí odkaz:
http://arxiv.org/abs/1902.07297
We advocate the step change in properties of discrete $d$-level quantum systems, between $d=2$ and $d\geq 3$. Qubit systems, or multipartite systems containing qubit subsystem, are exceptional in their relative simplicity. One faces a step in complex
Externí odkaz:
http://arxiv.org/abs/1610.00041
Publikováno v:
J.Phys.A: Math. Theor. vol. 50, 245301(2017)
We study the measurement-induced geometric discord based on the trace norm and generalize some properties known for qutrits to qudits. Previous preliminary results for bipartite qutrit systems (i.e. d=3 systems) are here strictly proved for arbitrary
Externí odkaz:
http://arxiv.org/abs/1607.08753
Autor:
Jakobczyk, Lech
We introduce an algebraic measure of correlations in bipartite quantum systems. The proposed quantity, called maximal mutual correlation, provides the information how much a given state differs from the product state of its marginals. In contrast to
Externí odkaz:
http://arxiv.org/abs/1607.06585
Publikováno v:
Phys. Lett. A 380, 1535(2016)
In the paper we study the notion of trace norm geometric discord in the system of two qutrits. We compute this quantity for some class of states including qutrit Bell states, Werner states and bound entangled states.
Comment: Published version
Comment: Published version
Externí odkaz:
http://arxiv.org/abs/1511.06097
Autor:
Jakobczyk, Lech
Publikováno v:
Phys. Lett. A, vol. 378, p. 3248 (2014)
Hilbert - Schmidt and trace norm geometric quantum discord are compared with regard to their behavior during local time evolution. We consider the system of independent two - level atoms with time evolution given by the dissipative process of spontan
Externí odkaz:
http://arxiv.org/abs/1408.0647
Autor:
Derkacz, Łukasz, Jakobczyk, Lech
Publikováno v:
Phys. Rev. A 82, 022312(2010)
The dynamical creation of entanglement between three-level atoms coupled to the common vacuum is investigated. For the class of bound entangled initial states we show that the dynamics of closely separated atoms generates stationary distillable entan
Externí odkaz:
http://arxiv.org/abs/1005.0687
Autor:
Jakobczyk, Lech
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. vol. 43, 015502(2010)
The dynamics of entanglement between two-level atoms immersed in a common photon reservoir at finite temperature is investigated. It is shown that in the regime of strong correlations there are nontrivial asymptotic states which can be interpreted in
Externí odkaz:
http://arxiv.org/abs/0908.3555
Autor:
Jakobczyk, Lech
It is shown that even if the linear entropy of mixed two-qubit state is not smaller then 0.457, Bell - CHSH inequalities can be violated. This contradicts the result obtained in the paper of E. Santos [1].
Comment: 1 page
Comment: 1 page
Externí odkaz:
http://arxiv.org/abs/quant-ph/0409087