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Engineering Entanglement in Cavity Quantum Electrodynamical Systems

Thesis Info

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Author

Islam, Rameez-Ul

Program

PhD

Institute

Quaid-I-Azam University

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

2008

Thesis Completion Status

Completed

Subject

Physics

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/187

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726057122

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Phenomenon of entanglement was justly referred by Erwin Schrödinger as the characteristic trait of the quantum theory. On one hand, the phenomenon helped a lot to clarify the conceptual foundations of the theory. On the other hand, the very same nonlocal, counterintuitive correlations that bind entangled entities are now being employed as a backbone resource for most of the quantum informatics tasks including cryptography, teleportation, entanglement swapping, quantum computation and many others. Therefore controlled engineering of entangled states becomes vitally important. Present work deals with four theoretical proposals for the cavity QED based generation of a variety of entangled atomic and cavity field states including Bell, W, NOON, cluster and graph states. In first two proposals, atom interferometry in Bragg regime has been utilized for the engineering of Bell, W and NOON cavity field states. In this respect, basic constituents of Mach-Zehnder-Bragg (MZB) interferometers i.e. atomic de Broglie wave mirrors and beam splitters have been explored in detail. It is further demonstrated that by manipulating split atomic de Broglie wavepackets in a MZB interferometer, the required states can be engineered in an experimentally feasible manner while utilizing time-tested standard cavity QED tools. This work therefore opens up a new vista for quantum state engineering based on atom interferometry. Remaining two proposals aim at the generation of atomic and cavity field cluster and graph states and employ dispersive as well as resonant atom-field interactions as architectural components of the phase gate. First scheme in this section utilizes the concept of collective eraser whereas the second proposal, the most resource economical one, is based on the simultaneous resonant and dispersive interactions of two two-level atoms with an initially vacuum state high-Q cavity. Here the phase gate operation and hence the state engineering is accomplished when cavity is detected again into vacuum state after culmination of the interactions. Various parameters affecting success probability and fidelity of the proposed protocol have also been elucidated briefly. The parametric dependence of success probability and fidelity on most crucial factors of imprecision in the interaction times have also been plotted for the sake of quantitative assessment. This section is also concluded by providing a comprehensive note on the experimental feasibility of the presented work.
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مولوی محمد یحییٰ تنہاؔ

مولوی محمد یحییٰ تنہاؔ
افسوس ہے کہ گزشتہ رمضان میں مولوی محمد یحییٰ تنہا مرحوم نے کراچی میں انتقال کیا، مرحوم اردو زبان کے مشہور اہل قلم، اس کے پرانے خدمت گزار اور متعدد کتابوں کے مصنف و مترجم تھے، ان کی سب سے مشہور و مفید کتاب سیر المصنفین اور مراۃ الشعراء ہے، دونوں دو جلدوں میں ہیں، سیرالمصنفین میں شروع سے لے کر موجودہ دور تک کے مصنفین کے حالات اور ان کی تصانیف پر تبصرہ ہے، اس میں اردو کی پوری تاریخ آگئی ہے، مراۃ الشعراء اردو کے شعراء کا تذکرہ ہے، اﷲ تعالیٰ ان کی مغفرت فرمائے۔
(شاہ معین الدین ندوی، فروری ۱۹۶۷ء)

 

غزواتِ نبویہ ﷺ میں اہلِ کتاب کے ساتھ اخلاقِ حسنہ کے مظاہر Manifestations of Akhlaq-e-Hasanah (good manners) with the People of the Book (Ehl-e-Kitab) in Ghazwat-e-Nabawiyyah ﷺ

When we study about the life of Holy Prophet (ﷺ), his life demand from Muslims to protect the dignity and honour of their Muslim brothers. They not only protect or care the right of their Muslim brothers in their life but also protect their dignity after their death. In the light of Holy Prophet Life the circle of human rights is so vast. In this, his life teaches us the turidicul, rights, marriage, settlement different between good or evil, isonomy and the verses of martyr and the noble behaviour with Jews and Christians. There is a big role of ethics on the human personality. The ethics is the tester of good or bad person Human with the noble ethics the Muslims. To be remembered as staying up all the night and to fast. The ethics play important role in the life of Human. In the life of Prophet (ﷺ) we know about his good deeds and noble behavior with non Muslims. The success of the Holy Prophet preaching is only because of his ethics and truthness. Islam Universal Religion. It’s Teachings and pregnative system is the everlasting. In this modern period there is no way except Islam to get Rid the unsolved problems of the age. The beloved Prophet (ﷺ) “Sira Mubarak” the way of light only. There is aspect of the life without the real pregnative system. Peace and the War both are in the teaching of the Holy Prophet (ﷺ). Peace, progress contentment, satisfaction, true, unity, brotherhood in the lightment of the “Uswa Hasna”. Let’s seek the real way in our beloved Prophet (ﷺ). Key Words: Holy Prophet, Ghazwa, Akhlaq-e-Hasanah, Ehl-e-Kitab, War, Ethics.

Molecular Characterization and Allelopathic Management of Meloidogyne Incognita Kofoid and White Chitwood in Tomato

Root knot nematodes (Meloidogyne spp.) are important obligate parasites attacking many vegetables, fruits and ornamentals worldwide. Nematode populations from thirty commercial production fields of tomato of Malakand division in the Khyber Pakhtunkhwa province of Pakistan showed wide variations within and among species using the perineal pattern morphology and molecular tools. Three species viz., Meloidogyne incognita, Meloidogyne javanica and Meolidogyne areanaria were found either alone or co-infesting tomato roots (80.3%) and soil (87.3%). Disease was prevalent 100% with an average of 52.0% in the study area. More than one root knot nematode species were found together in the same plant roots; however, Meloidogyne javanica, occurred with the highest frequency (70.33%). A comprehensive molecular characterization of root knot nematode (RKN) populations belonging to ten localities of the Khyber Pakhtunkhwa province was carried out at the James Hutton Institute (JHI), Scotland, UK, employing the ribosomal DNA (rDNA) primers (D2A/D3B and 194/195) and species-specific SCAR primers i.e. Finc/Rinc (M. incognita), Fjav/Rjav (M. javanica) and Far/Rar (M. arenaria). Regardless of the species, the D2-D3 of 28S of rDNA gene and ITS2 region between 5S and 18S rDNA genes amplified the expected bands of approximately 750 bp and 720 bp, respectively common to all the populations tested. The SCAR primers generated species-specific bands of 1200, 670 and 420 bp in M. incognita, M. javanica and M. arenaria, respectively. Meloidogyne spp., were discriminated using mtDNA as an additional genetic marker. The C2F3/1108 primer pair amplified the COII/lrRNA region of mtDNA and produced a 1.7 Kb size band common to all the three species of RKNs except Meloidogyne chitwoodi (520 bp), Meloidogyne fallax (520 bp) and Meloidogyne enterolobii (750 bp), employed as negative control. Restriction digestion of the mtDNA-PCR product (1.7 Kb) with different 4-bp (Hinf 1, Taq 1, Mbo1, Alu 1) and 6-bp (Eco R1) restriction enzymes, amplified characteristic diagnostic patterns in each Meloidogyne spp., except the Taq1 enzyme which did not cleave the mtDNA-PCR product. The Hinf I generated three-banded diagnostic fragments (1700, 1300 and 400 bp) in M. incognita. The Mbo1 (viz., 1700, 1300, 1000, 720 and 520 bp) and Eco R1 (1700, 1200 and 520 bp) generated a five and three banded- pattern in all RKN populations respectively, whereas the Alu 1 enzyme produced frequent cuts in the mitochondrial genomes of all the three tested species. Genetic diversity among and within Meloidogyne species and populations were determined using the randomly amplified polymorphic (RAPD) DNA method. Three RAPD primers SC 10-30, OPG-13 and OPG-19 grouped the three mitotic species (Meloidogyne incognita, M. javanica, M. arenaria), in distinct separate cluster than the other species (M. chitwoodi, M. fallax, M. hapla and M. enterolobii) utilized as positive control. Meloidogyne javanica and M. arenaria were grouped more closely (50 %) than M. incognita (42.8 %). DNA sequencing ii of the 28S rDNA gene fragment of selected eight nematode genotypes (T1, W2, M3, J3, F2, J4, R2 and H1) belonging to three species (M. javanica, M. incognita, M. arenaria) representing the Khyber Pakhtunkhwa province were deposited to the Genbank with accession numbers (JQ317912-19). The intra-specific variability ranged from 3 nucleotides (0.4% differences) (between J3 and T1) to 27 nucleotides (4.2 % differences) (between W2, M3 and J3) for M. javanica (636 bp alignment). Sequence analysis of D2- D3 expansion segment of 28S rDNA did not discriminate the three closely related Meloidogyne spp. Juveniles and eggs of M. incognita were challenged in a series of in vitro experiments to plant extracts and pure compounds from a medicinal herb and annual weed, Fumaria parviflora Lam. The roots and stem crude extracts of the above plant showed the highest hatch inhibition (74.42 and 64.33%) and juvenile mortality (78.83 and 64.33%) against M. incognita at 12.5 mg mL-1. In in vitro experiments, the n-hexane extracts of the roots and stems showed the highest hatch inhibition (100%) and J2s mortality (100%). Hatch inhibition and J2s mortality were directly related to exposure time. The area under cumulative percentage hatch inhibition (AUCPHI) and mortality (AUCPM) were both augmented with increase in concentration. Silica gel column chromatography of the n- hexane and methanol fractions afforded eleven (F1 to F11) and seven (FM2.1 to FM2.7) sub-fractions, respectively. The F3 (98.77 %), F4 (90.25%) and FM2.1 (99.75%) exhibited the highest hatch inhibition at a concentration of 400 μg mL.-1 The J2s mortality for F3, F11, F4 and FM2.1 were 95.00, 88.25, 86.0 and 100%, respectively. The phytochemical screening of F. parviflora revealed the presence of seven classes of bioactive compounds (viz., alkaloids, flavonoids, glycosides, tannins, saponins, steroids and phenols). The quantitative determination of the plant extracts showed the highest percentage of alkaloids (0.9 ± 0.04) and saponins (1.3 ± 0.07) in the roots and total phenolic contents in the stem (16.75 ± 0.07 μg dry g-1). Three known nematicidal bioactive compounds viz., nonacosane-10-ol, 23a-homostigmast-5-en-3ß-ol from the roots n-hexane fraction and cis- and trans- prtopinium from the MeOH roots fractions of F. parviflora were isolated through activity-guided isolation. These compounds were identified through 1 H NMR and 13C-NMR, characterized and their physical properties determined. The 1H NMR and 13C NMR chemical shifts of cis-protopinium (minor) and trans-prtopinium (major) at 25 oC occurred in 2:1 and stability of trans-protopinium at 80 oC. Stem and root extracts of F. parviflora were evaluated for possible nematicidal activity against M. incognita in a screen-house trials. In pot trials with tomato, cv. Riogrande, F. parviflora roots and stem extracts, at concentrations of 1000, 2000 and 3000 ppm, applied as a soil drench, significantly reduced the root knot nematode number of galls, galling index, eggs masses, eggs and reproduction factor in comparison to the water control. Regardless of the concentrations, the application of all the extracts significantly increased the host plant parameters. The n-hexane extracts from the roots and stem were the most effective followed by methanol at all concentrations. In a second screen-house experiment, dried plant parts (roots, stem, foliage and the whole plant powder) of F. parviflora evaluated under varying application doses (0, 10, 20 and 30 g kg-1) significantly reduced the disease parameters. The number of galls and galling index, egg masses g-1 of roots, eggs per egg mass, adult root knot nematode females and J2 population were decreased substantially. The root powder dramatically reduced the galls (46.63 and 61.13), galling indices (2.33 and 2.96) and J2s populations (122.1, 250.7) in the spring and fall, 2010 in comparison to the control. The host plant growth parameters (shoot length, root length, fresh and dry shoot weight, number of branches plant-1 and number of flowers plant-1) increased significantly (P < 0.05). Field performance of amending soil with F. parviflora (roots, stems, foliage and whole plant) at different application doses (0, 10, 20 and 30 g dry powder plant-1) around the tomato rhizosphere showed positive plant responses in the spring and fall, 2010. Number of galls (31.00 and 39.25) and GI (1.25 and 1.87) were markedly reduced with the Fumaria roots powder. The fresh shoot weight (55.00 and 53.0 g), dry shoot weight (27.00 and 29.0 g), shoot length (48.0 and 55.0 cm), root length (21.50 and 26.75 cm), number of branches plant-1 (20.0 and 22.50 branches plant-1), number of flowers plant-1 (65.0 and 69.50) and number of fruits plant-1 (57.25 and 55.25) were significantly higher (P < 0.05) in the field treatments amended with the roots powder at the highest application dose. Conversely, the disease was severe in the untreated control plots which negatively affected the plant growth parameters. Results revealed that plant extracts, pure compounds and dry powder of F. parviflora can be used for management of root knot nematodes. Extracts and pure compounds of F.parviflora provide new insight for the development bio-commercial nematicides, in addition, F. parviflora shows great potential as a bionematicide because of the richness and diversity of compounds effective against Meloidogyne spp." xml:lang="en_US