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Teadching-Assistant - مدرس مساعد الجراحة العامة وجراحة وزراعة الكبد والبنكرياس والقنوات المرارية

Faculty of medicine

Address: سوهاج - شارع الترعة المردومة - خلف المستشفى الجامعى

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Publications Which contain the keyword: Entanglement


2018-12-13 20:34:05 Keywords sudden death, Entanglement, two trapped ions,
Sudden death and long-lived entanglement of two trapped ions
The dynamical properties of quantum entanglement in two effective two-level trapped ions interacting with a laser field are studied in terms of the negative eigenvalues of the partial transposition of the density operator. In contrast to the usual belief that destroying the entanglement can be observed due to the environment, it is found that the Stark shift can also produce ... Read more

A Novel Algorithm based on Entanglement Measurement for Improving Speed of Quantum Algorithms,
In this paper, we draw attention to consider that the quantum entanglement measurement should be implemented as a key part during manufacturing the quantum processors and quantum micro-controllers. This paper aims to harness the complete power of quantum mechanics by the crossover between entanglement measurements and quantum gates to propose a novel quantum computer algorithms and protocols. One of these ... Read more

2018-12-15 11:09:56 Keywords Entanglement, a bipartite mixed state, a binomial state,
Entanglement of a bipartite mixed state in the laser‐ion interaction with a binomial state
In the present communication we explore and develop the theory of entanglement measures. As a result we obtain a general criterion of a bipartite mixed states entanglement due to the quasi‐mutual entropy for a single trapped two‐level ion interacting with a laser field. This general expression of the entanglement degree is obtained with the physical significance and without the diagonal ... Read more

2018-12-06 15:41:06 Keywords A SPIN-PATH, COHERENT vectors, Entanglement,
COHERENT AND INCOHERENT BEHAVIORS OF QUBITS INTERACTING WITH A SPIN-PATH PARTICLE
We analyze a crucial effect of the spin-path environment on a single and maximum entangled two-qubit systems. For a single qubit, we investigate the coherent loss by means of coherent-vectors' dynamics and the interacted qubits' fidelity. We used entanglement and population dynamics to investigate the coherent loss of the two-qubit system. We show and numerically verify that the effect of ... Read more

2018-12-06 14:02:18 Keywords Linear Entropy, Antiferromagnetic Spin Bath, Entanglement,
Linear Entropy of a Driven Central Spin Interacting with an Antiferromagnetic Environment
We exploit a scheme to obtain a long-lived entanglement using a driven central spin interacting with an antiferromagnetic spin bath. Our numerical results show the effects of different parameters on the population inversion and the entanglement dynamics in terms of the linear entropy. It is shown that the long-lived entanglement is an intriguing result corresponding to the collapse region of ... Read more

2018-12-05 13:13:50 Keywords trap phonon modes, multi-trapped ions, rebirth, Entanglement,
Entanglement rebirth of multi-trapped ions with trap phonon modes
We consider a multi-qubit system consisting of two trapped ions coupled in a laser field. The ions are identical three-level electronic systems which interact with one another through the phonon modes of their relative or center of mass motions, and the system is tuned so that two-phonon processes dominate the electronic transitions. The resulting evolution of the system is studied ... Read more

Locality and classicality: role of entropic inequalities
The use of the so-called entropic inequalities is revisited in the light of new quantum correlation measures, specially nonlocality. We introduce the concept of _classicality_ as the nonviolation of these classical inequalities by quantum states of several multiqubit systems and compare it with the nonviolation of Bell inequalities, that is, _locality_. We explore—numerically and analytically—the relationship between several other quantum ... Read more

2018-12-03 12:36:14 Keywords Entanglement, Energy, multi-atom,
New Perspectives on Nonlinear Multi-Atoms Interacting with a Cavity Field
We investigate the entanglement dynamics of two two-level atoms interacting with a quantized cavity field, considering the level shifts produced by the Stark effect. We perform comparisons of the entanglement evolution of this system when the cavity is filled with a Kerr-like medium. The presence of entanglement sudden death and sudden birth using extended Werner-like states is observed. Entanglement is ... Read more

2018-12-14 15:40:49 Keywords Entanglement, two qubits,
Entanglement and  information transfer between two qubits
* Metwally and _M. Abdel-Aty_, Entanglement and information transfer between two qubits Physica A: Statistical Mechanics and its Application(2007) Read more

2018-12-14 20:47:30 Keywords Entanglement, a single trapped ion, A LASER FIELD,
Engineering entanglement in a single trapped ion interacting with a laser field
Engineering entanglement in a single trapped ion interacting with a laser field Read more