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Browsing Department of Physics by Title
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(Massachusetts Institute of Technology, 2004)According to the WMAP and earlier COBE observations, the Cosmic Microwave Background (CMB) anisotropy power on large angular scales appears to be significantly lower than predicted by the standard model of cosmology. We ...
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(Massachusetts Institute of Technology, 2012)We describe a setup to search for the existence of a massive gauge boson A', the "dark photon," mediating dark matter interactions with coupling strength [alpha]'. In certain models, the A' decays promptly but invisibly ...
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(Massachusetts Institute of Technology, 2012)N-body simulations have revealed a wealth of information about dark matter halos but their results are largely empirical. Here we attempt to shed light on simulation results by using a combination of analytic and numerical ...
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(Massachusetts Institute of Technology, 2012)We study a new form of dark matter interaction which may significantly affect the thermal relic abundance of dark matter. This new interaction takes the form C+D --> C+[phi], where D is the dark matter species present ...
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(Massachusetts Institute of Technology, 2004)The process for calculating the single photoelectron gain in the Super-Kamiokande outer detector has been streamlined. The original technique used optic fibers to expose the detector's photomultiplier tubes to known amounts ...
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(Massachusetts Institute of Technology, 2013)In this thesis we present a data-driven neuromuscular model of human walking and its application to prosthesis control. The model is novel in that it leverages tendon elasticity to more accurately predict the metabolic ...
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(Massachusetts Institute of Technology, 1999)
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(Massachusetts Institute of Technology, 2006)In this thesis we study the D-brane physics in the context of Witten's cubic string field theory. We compute first few terms the low energy effective action for the non-abelian gauge field A, from Witten's action. We show ...
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(Massachusetts Institute of Technology, 2002)In this thesis, we present several works done in last three years. They include three directions in the string theory. In the first direction, we use the brane setup to find mirror pairs of SO(n) and Sp(k) gauge groups for ...
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(Massachusetts Institute of Technology, 1958)
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(Massachusetts Institute of Technology, 2006)The physics of blackbodies has been an ongoing source of fascination and scientific research for over a hundred years. Kirchhoff's law states that emissivity and absorptivity are equal for an object in thermal equilibrium. ...
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(Massachusetts Institute of Technology, 1996)
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(Massachusetts Institute of Technology, 2017)The fabrication of inorganic semiconductor devices, such as silicon solar cells and photodetectors, is despite significant research still expensive and energy intensive. Especially for solar cells, high upfront costs are ...
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(Massachusetts Institute of Technology, 2009)Inflation is a substantial modification to the big bang theory, and supernatural inflation is a hybrid inflation motivated from supersymmetry. In this thesis we carry out a one dimensional numerical simulation to verify ...
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(Massachusetts Institute of Technology, 2009)A 4-channel microwave interferometer (center frequency: 60 GHz) has been constructed to measure the density profiles of plasmas confined within the Levitated Dipole Experiment (LDX). LDX is the first and only experiment ...
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(Massachusetts Institute of Technology, 2006)This thesis describes the design and construction of two laser systems to probe the 674nm transition of ⁸⁸Sr⁺ ions in a linear Paul trap. The first laser system made use of a molecular transition in Iodine to stabilize the ...
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(Massachusetts Institute of Technology, 1975)
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(Massachusetts Institute of Technology, 2001)A periodic arrangement of atoms in a crystal presents a periodic potential for electrons. The bragg diffraction of electrons from the atoms may lead to a band gap, which represents a range of frequencies the electrons ...
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(Massachusetts Institute of Technology, 1979)
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(Massachusetts Institute of Technology, 1999)
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