ahmed_ahmed4

Ahmed Roshdi Hamed Ahmed

Assistant Professor - Assistantt Professor of Pathology

Faculty of medicine

Address: Sohag, Naser City.

19

Like

Publications Which contain the keyword: sudden death


Cardiac Myxomas: A single center experience and ten-years follow up
ABSTRACT BACKGROUND: Cardiac myxoma is a benign tumor that carries the risk of embolization and obstruction of the blood flow. The ideal surgical approach is still debatable. We present our experience in the surgical treatment of cardiac myxomas and its ideal surgical approach. METHODS: We retrospectively analyzed the data for all patients who underwent surgical excision of cardiac myxoma at ... Read more

Cardiac Myxomas: A single center experience and ten-years follow up
Background: Cardiac myxoma is a benign tumor that carries the risk of embolization and obstruction of the blood flow. The ideal surgical approach is still debatable. We present our experience in the surgical treatment of cardiac myxomas and its ideal surgical approach. Methods: We retrospectively analyzed the data for all patients who underwent surgical excision of cardiac myxoma at our ... Read more

Entanglement of a nonlinear two two-level atoms interacting with deformed fields in Kerr medium
In this paper we investigate the entanglement dynamics between two two-level atoms interacting with two coherent fields in two spatially separated cavities which are filled with a Kerr-like medium. We examine the effect of nonlinear medium on the dynamical properties of entanglement and atomic occupation probabilities in the case of even and odd deformed coherent states. The results show that ... Read more

2018-12-06 19:23:18 Keywords sudden death, quantum correlations, coupling regime,
Sudden death and robustness of quantum correlations in the weak- or strong-coupling regime
We study the dynamics of quantum discord and entanglement of two entangled two-level atoms within two isolated and dissipative cavities in the weak- or strong-coupling regime. The quantum entanglement are measured by concurrence and relative entropy. The quantum discord of two atoms based on quantum mutual information and relative entropy are also calculated. In the weak-coupling regime, the sudden death ... Read more

Entanglement sudden death and sudden birth of an atom coupled to a bimodal lossy cavity
We propose another method for realizing entanglement sudden death and sudden birth using a single atom interacting with a bimodal cavity field in a dissipative environment. By suitably choosing the system's parameters and precisely controlling the dynamics, we find a novel connection between maximum entanglement and mixed state parameters. We discuss the intricate relationship between the entanglement dynamics and the ... Read more

2018-12-12 14:45:04 Keywords sudden birth, sudden death, Entanglement,
Delayed sudden birth and sudden death of entanglement in Josephson-charge qubits
Distinctive features of the entanglement dynamics of a circuit containing two-coupled superconducting charge qubits are explored. The striking effects of junction coupling on the entanglement are presented in terms of the concurrence. We also point out the importance effects of initial state selection for obtaining different features of entanglement, such as, sudden death and sudden birth. Read more

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

  • «
  • 1
  • »