Dartmouth Digital Library Program

Excitation transfer in strain-induced quantum wires and dots.
Semiconductors -- Optical properties. Quantum wells. Quantum electronics.
Quantum wires and dots can be created by patterning inhomogeneous strain on semiconductor quantum wells. I have used laser spectroscopic methods to study the carrier transfer from the host quantum well to quantum wires and dots. For quantum dot...
Dartmouth Dissertations

Dynamical scaling behavior in non-equilibrium quantum phase transitions
Phase transformations (Statistical physics);""Scaling laws (Nuclear physics)"";""Critical phenomena (Physics)"";""Nuclear spin.""
This thesis focuses on the emergence of universal dynamical scaling in quantum critical spin systems driven out of equilibrium, with emphasis on quench dynamics which involves isolated standard critical points, multi-critical points, and...
Dartmouth Dissertations

Examining auroral downward current region processes using ground based data.
Auroras -- Alaska -- Observations. Magnetospheric currents.
This thesis presents data from ground camera observations of the aurora conducted from Alaska during the winters of 2005 through 2007. In conjunction with these camera observations, conjugate radar observations of the auroral ionosphere were...
Dartmouth Dissertations

The quantum-to-classical transition in strongly interacting nanoscale systems / by Latchezar Latchezarov Benatov.
This thesis comprises two separate but related studies, dealing with two strongly interacting nanoscale systems on the border between the quantum and classical domains. In Part 1, we use a Born-Markov approximated master equation approach to study...
Dartmouth Dissertations

Development of an apparatus for simultaneous trapping of ⁶Li-⁸⁷Rb Fermi-Bose mixtures.
Trapped ions -- Instruments. Magnetooptical devices -- Design and construction. Atoms -- Cooling. Lithium ions. Rubidium -- Isotopes.
Dartmouth Dissertations

Emergent coherent structures in nonequilibrium field theory.
Coherent states. Quantum field theory. Nonlinear theories.
In this thesis we study the properties of time-dependent, nontopological configurations and their effect on the macroscopic properties of a system described by a nonlinear field theory. These structures seem to be ubiquitous in relativistic field...
Dartmouth Dissertations

Superconducting single electron transistor for charge sensing in Si/SiGe-based quantum dots / by Zhen Yang
Si-based quantum devices, including Si/SiGe quantum dots (QD), are promising candidates for spin-based quantum bits (quits), which are a potential platform for quantum information processing [1]. Meanwhile, qubit readout remains a challenging task...
Dartmouth Dissertations

Photo-induced free ion formation in charge transfer complexes.
Electron donor-acceptor complexes. ; Complex compounds. ; Photochemistry.
In this study we have utilized spectroscopic and photoconductivity techniques to investigate free ion formation in the fumaronitrile/trans-stilbene charge transfer-complex. We report free ion yields resulting from the direct excitation of this...
Dartmouth Dissertations

On the nature of the photoconductivity in ice.
Ice. ; Photoconductivity. ; Ice crystals -- Growth. ; Ice -- Plastic properties -- Effect of ultraviolet radiation on.
Dartmouth Dissertations

Structure, evolution, and boundary conditions for auroral downward current region potential drops.
Auroras -- Alaska -- Observations. Magnetospheric currents. Electric currents. Magnetic fields.
Auroral downward-current regions balance the upward currents of visible auroral arcs. FAST satellite data show conclusive evidence to confirm that these downward current regions (DCR) contain positive potential structures with diverging DC electric...
Dartmouth Dissertations

Analytical and numerical studies of coherent field configurations.
Phase transformations (Statistical physics) -- Mathematical models. ; Nonlinear systems -- Mathematical models. ; Bubbles -- Mathematical models.
Motivated by the goal of investigating the dynamics of the electroweak phase transition in the early Universe, a study of dynamical aspects of nonlinear field-theoretical systems is performed. Symmetric and asymmetric double-well potentials in the...
Dartmouth Dissertations

Nonequilibrium dynamics of emergent field configurations.
Nonequilibrium thermodynamics -- Mathematical models. Fluctuations (Physics) -- Mathematical models. Phase transformations (Statistical physics) -- Mathematical models. Configurations.
The processes by which nonlinear physical systems approach thermal equilibrium is of great importance in many areas of science. Central to this is the mechanism by which energy is transferred between the many degrees of freedom comprising these...
Dartmouth Dissertations

Theoretical models for the emergence of biomolecular homochirality.
Chirality. Biomolecules -- Mathematical models. Molecular evolution -- Mathematical models.
Little is known about the emergence of life from nonliving precursors. A key missing- piece is the origin of homochirality: nearly all life is characterized by exclusively dextrorotary sugars and levorotary amino acids. The research presented in...
Dartmouth Dissertations

Nonlinear emergent complexity during cosmological symmetry breaking
In this thesis, the dynamics of long-lived, time-dependent, coherent field configurations, known as oscillons, are investigated in the presence of an expanding background. In a (1+1)-dimensional expanding spacetime, scalar-field oscillon lifetimes...
Dartmouth Dissertations

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