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Degree of Entanglement and Violation of Bell Inequality by Two-Spin-1/2 States

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Communications in Theoretical Physics 2011年第10期56卷 679-686页

作者： K.Berrada y.hassouni H.Eleuch Institut fr Angewandte Physik Technische Universitt DarmstadtD-64289 DarmstadtGermany Institute for Quantum Studies and Department of Physics Texas University TX 77843USA Laboratoire de Physique Theorique URAC 13 Departement de Physique Faculte des SciencesUniversite Mohammed V-Agdal Av.Ibn BattoutaB.P.1014-AgdalRabatMorocco

Bell inequality is violated by the quantum mechanical predictions made from an entangled state of the composite *** this paper we examine this inequality and entanglement measures in the construction of the coherent states for two-qubit pure and mixed states,we find a link to some entanglement measures through some new parameters(amplitudes of coherent states).Conditions for maximal entanglement and separability are then established for both pure and mixed ***,we analyze and compare the violation of Bell inequality for a class of mixed states with the degree of entanglement by applying the formalism of Horodecki et al.

关键词： Bell inequality quantum entanglement coherent states pure and mixed states

On M-theory on real toric fibrations

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Communications in Theoretical Physics 2021年第8期73卷 67-74页

作者： A Belhaj H Belmahi M Benali S-E Ennadifi y hassouni y Sekhmani Equipe des Sciences de la matière et du rayonnement ESMaRDépartement de Physique Facultédes SciencesUniversitéMohammed V de RabatMorocco LHEP-MS Département de PhysiqueFaculte des SciencesUniversitéMohammed V de RabatMorocco

Borrowing ideas from elliptic complex geometry, we approach M-theory compactifications on real fibrations. Precisely, we explore real toric equations rather than complex ones exploited in F-theory and related dual models. These geometries have been built by moving real toric manifolds over real bases. Using topological changing behaviors, we unveil certain data associated with gauge sectors relying on affine lie symmetries.

关键词： real fibrations M-theory toric real manifolds affine lie symmetries

Quantum Steganography via Greenberger-Horne-Zeilinger GHZ_4 State

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Communications in Theoretical Physics 2012年第4期57卷 577-582页

作者： A.El Allati M.B.Ould Medeni y.hassouni Facultédes Sciences Département de PhysiqueLPT-URAC-13UniversitéMohammed V-Agdal.Av.Ibn BattoutaB.P.1014RabatMaroc The Abdus Salam International Centre for Theoretical Physics TriesteItaly Facultédes Sciences Laboratory of Mathematic Informatics and ApplicationsUniversitéMohammed V-Agdal.Av.Ibn BattoutaB.P.1014RabatMaroc

A quantum steganography communication scheme via Greenberger-Horne-Zeilinger GHZ 4 state is constructed to investigate the possibility of remotely transferred hidden ***,the multipartite entangled states are become a hectic topic due to its important applications and deep effects on aspects of quantum ***,the scheme consists of sharing the correlation of four particle GHZ4 states between the legitimate *** insuring the security of the quantum channel,they begin to hide the secret information in the cover of *** the scheme with the previous quantum steganographies,capacity and imperceptibility of hidden message are *** security of the present scheme against many attacks is also discussed.

关键词： quantum steganography GHZ4 entangled state quantum cryptography quantum communication

Dynamics of Super Quantum Correlations and Quantum Correlations for a System of Three Qubits

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Communications in Theoretical Physics 2016年第4期65卷 447-452页

作者： F.Siyouri M.El Baz S.Rfifi y.hassouni Laboratoire de Physique Theorique Departement de Physique Faculte des sciences Universite Mohammed V - AgdalAv. Ibn Battouta B.P. 1014 Agdal Rabat Morocco

The dynamics of quantum discord for two qubits independently interacting with dephasing reservoirs have been studied *** authors [***.A 88(2013) 034304] found that for some Bell-diagonal states(BDS)which interact with their environments the calculation of quantum discord could experience a sudden transition in its dynamics,this phenomenon is known as the sudden *** in the present paper,we analyze the dynamics of normal quantum discord and super quantum discord for tripartite Bell-diagonal states independently interacting with dephasing ***,we find that basis change does not necessary mean sudden change of quantum correlations.

关键词： super quantum discord normal quantum discord Bell-diagonal states measurement strength