Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Ghiu, Iulia"'
Publikováno v:
Results in Physics 13, 102147 (2019)
We describe the dynamics of quantum discord of two interacting spin-1/2 subjected to controllable time-dependent magnetic fields. The exact time evolution of discord is given for various input mixed states consisting of classical mixtures of two Bell
Externí odkaz:
http://arxiv.org/abs/2101.07697
Autor:
Ghiu, Iulia
Publikováno v:
Rom. Rep. Phys. 72, 115 (2020)
In this paper we discuss the following scenario. Suppose that two distant observers share an entangled state of two $D$-level systems. The two observers, Alice and Bob, have to send randomly their particles through a multi-input multi-output device.
Externí odkaz:
http://arxiv.org/abs/2101.02642
Publikováno v:
Entropy 22, 785 (2020)
We study and compare the time evolutions of concurrence and quantum discord in a driven system of two interacting qubits prepared in a generic Werner state. The~corresponding quantum dynamics is exactly treated and manifests the appearance and disapp
Externí odkaz:
http://arxiv.org/abs/2010.03968
Autor:
Ghiu, Iulia
Publikováno v:
Quantum Information Processing 18, 285 (2019)
Quantum sorter has gained a lot of attention during the last years due to its wide application in quantum information processing and quantum technologies. A challenging task is the construction of a quantum sorter, which collect many high-dimensional
Externí odkaz:
http://arxiv.org/abs/1909.02465
Publikováno v:
Physical Review A 98, 033826 (2018)
We analyze the polarization of a quantum radiation field under a de-Gaussification process. Specifically, we consider the addition of photons to a two-mode thermal state to get mixed non-Gaussian and nonclassical states which are still diagonal in th
Externí odkaz:
http://arxiv.org/abs/1809.10547
Autor:
Ghiu, Iulia
Publikováno v:
Rom. Rep. Phys. 70, 104 (2018)
In this article we make a comparison between the behavior of entanglement and quantum degree of polarization for a special class of states of the radiation field, namely the Bell-type diagonal mixed states. For the three-photon mixed states we have p
Externí odkaz:
http://arxiv.org/abs/1804.04863
Publikováno v:
Physica Scripta, Volume 90, Issue 7, article id. 074041 (2015)
In this paper we examine the decay of quantum correlations for the radiation field in a two-mode squeezed thermal state in contact with local thermal reservoirs. Two measures of the evolving quantum correlations are compared: the entanglement of form
Externí odkaz:
http://arxiv.org/abs/1412.0096
Autor:
Ghiu, Iulia
Publikováno v:
Physica Scripta T160, 014013 (2014)
In this paper we investigate the efficiency of quantum cloning of $N$ identical mixed qubits. We employ a recently introduced measure of distinguishability of quantum states called quantum Chernoff bound. We evaluate the quantum Chernoff bound betwee
Externí odkaz:
http://arxiv.org/abs/1404.0915
Autor:
Adam, Peter, Andreev, Vladimir A., Ghiu, Iulia, Isar, Aurelian, Man'ko, Margarita A., Man'ko, Vladimir I.
We establish the relation of the spin tomogram to the Wigner function on a discrete phase space of qubits. We use the quantizers and dequantizers of the spin tomographic star-product scheme for qubits to derive the expression for the kernel connectin
Externí odkaz:
http://arxiv.org/abs/1312.6848
Autor:
Ghiu, Iulia, Ghiu, Cristian
Publikováno v:
Reports on Mathematical Physics 73, 49 (2014)
We study the connection between mutually unbiased bases and mutually orthogonal extraordinary supersquares, a wider class of squares which does not contain only the Latin squares. We show that there are four types of complete sets of mutually orthogo
Externí odkaz:
http://arxiv.org/abs/1312.3236