• Production of Dark Matter and Baryon Asymmetry in Non-standard Cosmologies 

  Das, Suruj Jyoti (2023)

  This thesis is devoted to the study of two long-standing problems of particle physics and cosmology: the origin of dark matter and the baryon asymmetry of our Universe, in the presence of a non-standard cosmological history ...
• Thermodynamic and fluid interpretations of gravitational field equations: General relativity and beyond 

  Dey, Sumit (2023)

  The intriguing connections between gravity and thermodynamics have been a long standing subject of study. The conventional laws of black hole mechanics have often provided deep insights into the nature of gravity. In this ...
• Excitation of Toroidal Resonances in Meta-surfaces and their Applications at Terahertz Frequencies 

  Bhattacharya, Angana (2023)

  he terahertz (THz) range of frequencies has become an important field of research in recent times, with the advent of electromagnetic metasurface technologies. This thesis focuses on the study of the excotic toroidal ...
• Develppment of Hydroxyapatite Based Ceramic Composites and thin Films for Biomedical Applications 

  Das, Apurba (2022)

  Hydroxyapatite (Ca10(PO4)6(OH)2, HAP) is an immensely favored biomaterial in the biomedical industry, known for its extensive applications in orthopedics and dentistry. Naturally, it appears as an inorganic constituent ...
• Tunable Ordered Assembly of MXene and Related Nanomaterials for Scalable Energy Applications 

  Dutta, Pronoy (2023)

  Development of functional macrostructures form two-dimensional materials while addressing the key fundamental challenges in supercapacitive energy storage systems remains a monumental task in the field of energy storage. ...
• Search for the decay B_s^0 → π^0 π^0 at high luminosity electron-positron collider experiment 

  Borah, Jyotimoi (2023)

  We report the results of the first search for the decay B_s^0 → π^0 π^0 using 121.4 fb^{-1} of data collected at the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy electron-positron collider. We ...
• Some Studies of the Semileptonic B-meson Decays via the Neutral and Charged Current Exchanges 

  Ray, Ipsita (2023)

  This thesis focuses on the study of the semileptonic B meson decays via the neutral and charged current exchanges. The charged current transitions occur at tree level in the Standard Model (SM) and the branching fractions ...
• Aspects of Low Scale Leptogenesis and Connection to Dark Matter 

  Mahanta, Devabrat (2023)

  The observed baryon asymmetry and dark matter (DM) in the universe have been two longstanding puzzles in particle physics and cosmology. While the standard model (SM) of particle physics can neither satisfy the required ...
• Aspects of Flavor Leptogenesis in Particle Physics and Cosmology 

  Datta, Arghyajit (2023)

  The dynamical generation of cosmological baryon asymmetry is one of the leading problems in the field of Particle physics and Cosmology, which the standard model of particle physics can not explain. In this thesis, we have ...
• Phases and Critical Analysis of Quantum Systems in presence of Quasiperiodic Potential 

  Roy, Shilpi (2023)

  Disorder is universal in quantum systems. It has an enormous effect on electronic motion in solids. Consequently, the system undergoes a localization transition from a metal to an insulator under the drive of random disorder ...
• Development of lithium ferrite-based ceramics for microwave applications 

  Mohapatra, Prajna Paramita (2023)

  Spinel ferrites have gained attention for a long period of time due to their unique electrical, optical, and magnetic properties. They are also very promising for applications such as circulators, phase shifters, memory, ...
• Atomic Coherence Based Electromagnetic Wave Interferometry 

  Shylla, Dangka (2023)

  This thesis reports on the theoretical and experimental studies of closed loop multi-level systems, where electromagnetically induced transparency (EIT) is dependent on the phase difference between the electromagnetic ...
• Development of Electronically Tuned Nanomaterials for Electrocatalysis 

  Majumdar, Abhisek (2023)

  A green energy-dependent sustainable future can be promised by converting and storing renewable energies in terms of chemical fuels like hydrogen through electrochemical water splitting. However, the requirements of high ...
• Classical and Quantum Aspects of Near-Horizon Physics 

  Dalui, Surojit (2023)

  In recent years, researchers' attention has been sparked by the thermal and geometrical characteristics of black hole horizons as well as their intimate relationship with the dynamics of particle motion surrounding them. ...
• Efimov Universality in Exotic Strange and Charm Nuclei: A Low-energy Effective Theory Framework 

  Meher, Ghanashyam (2023)

  The present thesis deals with the investigation of low-energy two- and three-body universality that could manifest in exotic strange and charm nuclei. To supplement the plethora of existing works based on potential models ...
• Implications of Flavour Data on Dark Matter Phenomenology 

  Mukherjee, Lopamudra (2022)

  The Standard Model of particle physics, with all its elegance, has survived most experimental tests at particle accelerators, but not all. This thesis arises in the context of dark matter phenomenology, whose ubiquitous ...
• Dielectric studies on MgTiO3 based composite ceramics and thin films for microwave applications 

  Rabha, Susmita (2022)

  There is a growing demand for new functional materials to enhance the performance of microwave devices due to rapid development in wireless communication technology. The composite approach is one of the versatile methods ...
• Study of Magnetic and Electrical Properties of Spinel Chromites and Ferrites 

  Borah, Ritupan (2022)

  Chromium-based spinels are a potential class of magnetic materials that exhibit multiferroic, magnetodielectric and magnetostructural coupling, exchange bias, and magnetization reversal etc. The discovery of such multifunctional ...
• Novel aspects of electromagnetic radiation in isotropic and anisotropic media 

  Daloi, Nilamoni (2022)

  The kernel of the thesis is rooted in the interaction of lasers with atomic or molecular vapor. A quantitative explanation of the physics behind laser-atom interaction is given in terms of something known as "atomic ...
• Quantum dynamics of low dimensional interacting systems using the continuous-time quantum walk 

  Giri, Mrinal Kanti (2022)

  The quantum walk (QW) is the quantum analog of the classical random walk where an initial state undergoes reversible, unitary time evolution leading to a dynamical evolution of the quantum states. The study of QW has ...

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