Decoherence and Relaxation Time of Magnetopolaron in the Presence of Three Dimensional Impurity Under Strong Parabolic Potential
Bernard Donfack,
Ghislain Tsopgue Tedondje,
Tetchoka Manemo Cedric,
Cornesse Drugile Guimapi Ngoufack,
Alain Jervé Fotue
Issue:
Volume 10, Issue 5, September 2021
Pages:
101-110
Received:
22 August 2021
Accepted:
3 September 2021
Published:
21 October 2021
Abstract: In order to protect coherence of quantum states and reduce the impact of environment on quantum information, we investigate decoherence and relaxation time of magnetopolaron in the presence of three dimensional impurity under strong parabolic potential. The first states energies have been evaluated using the Lee Low Pine transformation and Pekar-type variational method. Parameters such as: decoherence time, transition frequency, spontaneous emission, Shannon entropy, relaxation time and probability density, have been evaluated. It has been seen that the impurity and electron-phonon coupling constant have a considerable effect on formation, protection of quantum qubit and quantum transport. The information exchange measured by the rate of Shannon entropy, has a great dependence on impurity and with its interaction with electrons. The relaxation time τr exhibits increasing behavior as a function of, α, β, and ωc. The electron-phonon coupling constant, impurity and cyclotron frequency are useful parameters to prevent decoherence phenomena. This study paves the way to prolong quantum effect in nanostructure and favor the realization of the future quantum computer.
Abstract: In order to protect coherence of quantum states and reduce the impact of environment on quantum information, we investigate decoherence and relaxation time of magnetopolaron in the presence of three dimensional impurity under strong parabolic potential. The first states energies have been evaluated using the Lee Low Pine transformation and Pekar-ty...
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Investigation of Natural Pigments and Optical Properties for Some Sudanese Edible Oils Using UV - VIS Spectroscopy Techniques
Mahasin Mohamed Dafaa Allah Banaga,
Abdelmoneim Awadelgied,
Nafie Abdallatief Al Muslet,
Ahmed Abubaker Mohamed,
Abdalsakhi Suliman Hamed
Issue:
Volume 10, Issue 5, September 2021
Pages:
111-114
Received:
2 October 2021
Accepted:
19 October 2021
Published:
29 October 2021
Abstract: Edible oils are complex mixtures of organic substances of great commercial importance in the food, pharmaceutical, perfume and cosmetic industries due to their biological properties. This work was devoted to the detection of the total quantitative components of carotenoids and chlorophyll derivatives, as they are responsible for the color, which is an important qualitative characteristic of the oil because it contains antioxidants. Some optical properties of edible oils used in Sudan (corn, olive, peanut, factory sesame, presses sesame and sunflower) oil, purchased from local Sudanese stores were also measured and calculated using the method of UV-VIS spectroscopy (190-1100) nm. It was found that the absorption peak between (230-300) nm indicates the presence of di- and tri-unsaturated fatty acids. Polyphones share a band with different peaks between (300-400) nm. Carotenoids contribute a band with several peaks between (430 and 460) nm, and chlorophyll contribute another strong band at around (414, 670) nm. The results come to light similarity between the absorption spectrum, absorption coefficient and attenuation coefficient. From the transmission spectrum, it was found that corn oil and sunflower oil had the largest transmission spectrum and the lowest transmission spectrum of olive oil.
Abstract: Edible oils are complex mixtures of organic substances of great commercial importance in the food, pharmaceutical, perfume and cosmetic industries due to their biological properties. This work was devoted to the detection of the total quantitative components of carotenoids and chlorophyll derivatives, as they are responsible for the color, which is...
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Formation of a Biopolymer Nano Layer by Electrolysis
Jakhongir Khakkulov,
Abdulfatto Kholmuminov,
Temirov Zokirjon
Issue:
Volume 10, Issue 5, September 2021
Pages:
115-117
Received:
16 June 2021
Accepted:
29 June 2021
Published:
30 October 2021
Abstract: Composite nanocoatings on the surface of a titanium electrode are obtained by electrochemical reduction of macroions and fibroin nanoparticles in the presence of tricalcium phosphate. Based on the measurements, the dependence of the reduced viscosity (hуд/C) on C was constructed according to the Huggins formula hуд/C = [h] + k[h]2C (where k is a constant). For FB1 and [h] = 75 ml/g the intrinsic viscosity value [h] = 118 ml/g was found by means of С ® 0 extrazolation. The molecular masses М = 295000 for FB1 and M = 175000 for FB2 was calculated, respectively, as stated by Mark-Kuhn-Houwink equation М » ([h]/1,23*10-3)1/0,91. The studies were carried out on a specially assembled electrolysis unit using as a solvent HCOOH: Н2О (50: 50) under the influence of a direct current of 2-8 mA in a temperature range of 25-50°C. within 0.5 - 10 hours. The thickness of the nanocoatings in the range of 50 - 350 nm was controlled by changing the electrolysis time in the range of 0.5 - 10 hours. Furthermore, we have shown that the obtained samples of composite nanocoating FB are characterized by stability in the process of sterilization in ethanol at 60°C, as well as in salt-containing.
Abstract: Composite nanocoatings on the surface of a titanium electrode are obtained by electrochemical reduction of macroions and fibroin nanoparticles in the presence of tricalcium phosphate. Based on the measurements, the dependence of the reduced viscosity (hуд/C) on C was constructed according to the Huggins formula hуд/C = [h] + k[h]2C (where k is a co...
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