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Analysis of Atomic Coherence Effects in Cavity Quantum Electrodynamical Systems

Thesis Info

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Author

Imran, Muhammad

Program

PhD

Institute

Pakistan Institute of Engineering and Applied Sciences

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Physics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/13671/1/PhD%20Thesis%20IMRAN%20PIEAS.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725479147

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All counterintuitive and mysterious phenomena exhibited by the quantum theory are linked with the concept of quantum coherence in one way or the other. The best available tool to explicitly explore the in depth meaning of the quantum coherence is to utilize single-particle quantum interference under any preselected experimental scenario. Present thesis employs the themes of Delayed-Choice Quantum Eraser (DCQE) under single and double tag settings as well as the ideology of complementarity tested through Atomic Mach-Zehnder-Bragg interferometer for the purpose. For the DCQE case, our results clearly demonstrate that coherence and hence the interference fringes that get lost due to coupling with the tag ancilla can not only be retrieved back but strangely enough can also be tuned in a delayed-choice manner much later than the due data recording. This delayed-choice adjustability of the fringes shed out many controversies surrounding the quantum eraser along with the conception of the time in the quantum theory, meanings of the state vector reduction, measurement, information and the entropy as well as raises questions about the Ψ- ontic models. The second proposal suggests that quantum coherence apparently seems to lie beyond our classical space-time structure. Whereas the proposal based on atom interferometer with final beam splitter being quantum mechanical i.e. in superposition of being absent and present simultaneously, was used to observe both the wave and particle aspects under a single experimental setting, as suggested recently by Ionicioiu et.al. [Phys. Rev. Lett. 107, 230406 (2011)], and thus questioned the universality of the Bohr''s conjecture. We demonstrated it in a most realistic scenario based on an atomic interferometer with the final beam splitter taken as a high-Q cavity containing the field superposition of zero and one photon. The setup operates through first order off-resonant Atomic Bragg diffraction from the cavity fields with atom''s particle (wave) nature marked through the absence (presence) of a photon in the final cavity and explicitly exhibit wave-particle morphic behavior versus interaction variables. The thesis concludes with demonstration of experimental feasibility of the presented proposals and highlights future directions with a comprehensive philosophical discussion.
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ہک واری تاں پھیرا پا

ہک واری تاں پھیرا پا
درشن اپنا آپ کرا
ناں تاں ساڈا سن لیندا اے
بھانویں یار ہے بے وفا
جیہڑی چنگیر تیری وچ روٹی
پڑھ بسم اللہ اوہنوں کھا
لگدا اس دی منگنی ہو گئی
ٹردی پئی چنی لٹکا
ملنا خوشی غمی تے چاہیدا
دنیا دا ہے رکھ رکھا
جو گدا بوہے تے آوے
خیر خوشی نال اوہنوں پا
ساری عمر گناہیں گزری
ہن تاں در توبہ دے آ

خلع فسخ نکاح ہے یا طلاق فقہائے کرام کی آراء کا تجزیاتی مطالعہ Whether Khula is Dissolution of Marriage or Divorce Critical Analysis of the Views of Islamic Jurists

Islam is an entire way of life. It illuminates every facet of daily existence. There is no problem for which Islam has not provided a remedy. Every aspect of beliefs and ethics, including human affairs, has also been examined. Islam is the only religion on earth that can be compared the height of Western culture and civilization. People have become its slavish disciples in the most literal sense. To stay up with the rest of the world, they are creating new interpretations of Islam for this reason. Accepted wisdom is a benefit, but only within the bounds of Sharia. Otherwise, it is Shaytan's legacy. ۔(شیطان) One of the most significant and crucial stages in a person's life is the nikah. It is expressly covered in the Qur'an and Hadith. It is created necessary for sustaining human existence. It is referred to as the culmination of human life and one of the Prophet's (ﷺ) required Sunnas. However, one of the most despised actions is the dissolution of a marriage. Islam, however, differs from other faiths. It contains the entire procedure/laws for dissolving a marriage. The appropriate discussion of Talaq and Khula is illustrated by the jurists' use of Estihsan and Qayas. Recent years have seen various crises and a collapse in Pakistani society. Smear and family system disturbance are the main issues among them. "Nikkah" is the fundamental element of a family system; in reality, a family system is based on Nikkah. If this Nikkah is intact, the entire family system is stable; nevertheless, if this Nikkah is broken, not only is the family system traumatised, but the entire society begins to suffer. The summary of this thesis explains that the Islamic Ideological Council's recommendations have been reviewed in light of the non-Sharia practises of the judicial authorities in relation to Khula and judicial powers related to Khula, as well as an analytical study of the remarks and opinions of commentators and jurists, including future jurists, regarding Khula. Key Words: Khul‘a, Judicial Khul‘a, Tansīkh e Nikaḥ, Divorce, ‘Īddat.

Production and Molecular Characterization of Wide Cross Derivatives in Rice

Cultivated rice (Oryza sativa L.) is an important staple food for more than half of the people all around the world. Rice has a very narrow gene pool which can be broadened through transgression of genes from wild species for improving the cultivated rice. A comprehensive wide hybridization program was started at Department of Genetics, Hazara University, Mansehra, Pakistan. Four commercial varieties viz., Bas-385, JP-5, Fakhre Malakand, Swat-1 and two wild species of rice i.e. Oryza rufipogon and O. longistaminata were used in this endeavor. Seed viability of the germplasm was recorded and its dormancy was broken down for synchronized flowering. Interspecific crosses were made between commercial varieties and Oryza rufipogon. The pollinated spikelets were sprayed immediately with 75 ppm GA3 to enhance pollination. A mixture of growth regulators (100 ppm GA3, 25 ppm NAA and 5 ppm Kinetin) was applied twice a day for 7 days continuously to prevent embryo abortion. The F1 hybrids were confirmed through phenotypic markers such as color of the basal leaf sheath, stigma and awn color, pollen fertility, meiotic analyses, seed proteins, response to bacterial blight, phenotypic trait analysis in F2 and resistance pattern to bacterial blight in the F3 progeny. Total seed protein profile was also helpful in confirmation of the F1 hybrid. Results regarding the seed viability revealed significant results ranging from 78 - 92%, the lowest (78%) being recorded for the commercial variety Swat-1. Results of the seed dormancy, showed that O. rufipogon and O. longistaminata remained dormant and did not show any sign of germination at 32°C. The dry heat treatment of seed at 50°C, after remaining hull, improved the germination. The optimum temperature for germination was 35 ± 50 °C x and 40 ± 50 °C for the commercial varieties and wild species, respectively, in the lab. The quantitative traits also showed considerable diversity i.e., medium to high variance was recorded for culm length, culm diameter, culm number, peduncle length, leaf width, leaf area, flag leaf width, flag leaf area, ligule length, auricle length and anther length. Dendrogram analyses of the phenotypes sortout all genotypes into two main clusters A and B. Cluster A was comprised of commercial varieties along with their wild proginator O.rufipogon. Cluster A contained further two sub clusters A1 and A2. The sub cluster A1 consisted JP-5 and Fakhre Malakand that belong to O. sativa ssp. Japonica, whereas A2 consisted Indica type varieties along with O. rufipogon. The group B consisted O. longistaminata only. The total seed protein analyses showed 19 bands providing genetic distance estimates from 0–45%. Dendrogram constructed on the basis of total seed protein also sortedout all the genotypes into A and B main clusters. Where cluster A constituted the commercial varieties while cluster B consisted of wild species. Cluster A was further sub divided into two sub groups, A1 and A2. Sub cluster A1 was comprised of Japonica type varieties whereas A2 was comprised of Indica type varieties, the cluster B consisted of wild species only. Maximum genetic distance was observed between Bas-385 and O. longistaminata. Varities JP-5 and Fakhre Malakand showed 100% homology on the basis of total seed proteins. Cytogenetic analyses showed that all the genotypes had normal meiosis with remarkably high degree of chromosome pairing at M1. All the parents had a consistent chromosome number of 2n = 24, exhibiting one to one synapsis and one by one disjunction. Molecular analyses showed the presence of bacterial blight resistant gene Xa-21 in O. longistaminata. Oryza rufipogon, O. longistaminata, Bas-385 and Fakhre xi Malakand exhibited xa-13 gene. Varieties JP-5 and Fakhre Malakand showed the presence of xa-5 gene through PCR analysis. Resistance response to bacterial blight showed that the wild species were highly resistant to all the three local isolates of bacterial blight. Among the commercial varieties, Bas-385 proved moderately susceptible to Xoo-2 & Xoo-3, and moderately resistant to Xoo-1. Swat-1 proved to be highly susceptible to Xoo-2 and Xoo-3 and moderately susceptible to Xoo-1. The varieties JP-5 and Fakhre Malakand were moderately resistant to Xoo-1 and Xoo-2 and moderately susceptible to Xoo-3. Results of the interspecific crosses reveled that seed setting was generally very low ranging from 5.3 to 8.9% while its germination percentages ranged from 0–17.2%. Among the cultivated varieties only Bas-385 produced viable F1 hybrids when crossed with O. rufipogon. The F1 hybrids manifested heterosis for most of the quantitative traits. The syndatic behavior of chromosomal compliments of O. sativa and O. rufipogon, were analyzed in F1 hybrids. The frequently observed univalents, trivalents and laggards proved the hybrid nature of PMC’s. At metaphase I, all hybrids had more than 11.6 bivalents and 23.3 chiasma/PMC. Although on average all the hybrids showed normal meiosis, they produced 50-60% sterile pollen resulting in 85-95% spikelet sterility. Sixty three randomly selected F2 individual plants were evaluated on the basis of 14 quantitative traits. Basic statistics showed a considerable variability among the F2 genotypes for different traits. The response to bacterial blight showed that most of the F3 plants were resistant to bacterial blight isolates. Lines No, 1, 5, 10, 11, 12, 14, 20, 23, 24, 27, 29 and 30 proved highly resistant to all the three isolates of bacterial blight. Other lines showed differential responses to different Xoo isolates. The results showed that considerable xii variability with respect to the bacterial blight resistance was available in the F3 progeny, wherein the highly resistant germlines were selected as promosing lines for their potential use in genetic improvement of the cultivated rice.