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Optimal Multi-Level Interconnect Architecture for GSI Using Novel Solutions Replacing Copper
, Ph.D. Dissertation Sharif University of Technology ; Sarvari, Reza (Supervisor)
Abstract
Although a lot of research has been done on Carbon-based interconnect, there are many important questions unanswered. For example, there is no compact model for the resistance of bundle of CNTs at high frequencies, at which interconnects will be operating due to the scaling. Also there are many studies comparing CNT, GNR, and Cu wires but there is no study to show how much this will impact the design of a chip at today’s Giga Scale Integration. This comprehensive study should include chip performance, power dissipation and total number of metal levels. These two big questions are investigated in this dissertation. In the first part, high frequency behavior of CNT bundles is studied. A...
Compact closed form model for skin and proximity effect in multiwall carbon nanotube bundles as GSI interconnects
, Article IEEE Transactions on Electron Devices ; Vol. 61, issue. 8 , July , 2014 , p. 2899-2904 ; Sarvari, R ; Sharif University of Technology
Abstract
Closed form model for skin and proximity effect is necessary for GSI interconnects. In this paper, exact formulation for current distribution inside multiwall carbon nanotube (MWCNT) bundles is derived using multiconductor transmission line model. The current distribution is different from copper wires and it is geometry dependent because of kinetic inductance and quantum capacitance. This current distribution is used to compute and formulate high frequency resistance of MWCNT bundles
Analytical expression of giant Goos-Hanchen shift in terms of proper and improper modes in waveguide structures with arbitrary refractive index profile
, Article Optics Letters ; Volume 35, Issue 11 , 2010 , Pages 1759-1761 ; 01469592 (ISSN) ; Alishahi, F ; Sharif University of Technology
2010
Abstract
We analytically relate the giant Goos-Hanchen shift, observed at the interface of a high refractive index prism and a waveguide structure with an arbitrary refractive index profile, to the spatial resonance phenomenon. The proximity effect of the high refractive index prism on modal properties of the waveguide is discussed, and the observed shift is expressed in terms of proper and improper electromagnetic modes supported by the waveguide with no prism. The transversely increasing improper modes are shown playing an increasingly important role as the high refractive index prism comes closer to the waveguide
Emergent statistical bubble localization in a Z2 lattice gauge theory
, Article Physical Review B ; Volume 99, Issue 5 , 2019 ; 24699950 (ISSN) ; Mohseni Rajaee, M ; Langari, A ; Sharif University of Technology
American Physical Society
2019
Abstract
We introduce a clean cluster spin chain coupled to fully interacting spinless fermions, forming an unconstrained Z2 lattice gauge theory (LGT), which possesses dynamical proximity effect controlled by the entanglement structure of the initial state. We expand the machinery of interaction-driven localization to the realm of LGTs such that for any starting product state, the matter fields exhibit emergent statistical bubble localization, which is driven solely by the cluster interaction, having no topologically trivial noninteracting counterpart, and thus is of a pure dynamical many-body effect. In this vein, our proposed setting provides possibly the minimal model dropping all the...
Gauge Theory and Topological Order: Superconducting Chains
, Ph.D. Dissertation Sharif University of Technology ; Kargarian, Mehdi (Supervisor)
Abstract
Notwithstanding massive efforts put forward in the last few decades, the experimental realization of quantum states with topological orders in a controlled way and accessible conditions has remained elusive. The realization of such states in fractional quantum Hall states requires extreme conditions like the cryogenic temperatures and strong magnetic fields. Also, the existence of a pure topological order in spin liquid materials is limited by disorder, subleading interactions, or lack of enough experimental information. Alternatively, we may think of extrinsic models to simulate the exotic phases by combining a set of naturally accessible quantum systems. Our approach involves the...