# Browse by Subject "Physics, Condensed Matter"

• (2000)
Over the last decade, much progress has been made in understanding the thermodynamic and kinetic properties of self-assembled quantum dot structures. These structures form as a result of the strain energy in mismatched ...

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• (1995)
High resolution transmission electron microscopy (HRTEM) has been extensively used as a structure characterization technique in materials and biological science. In the past, qualitative use of HRTEM has been primarily employed.

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• (1986)
This thesis is devoted to a study of the quantum dynamics of small Josephson junctions. Of interest are those features of the junction's behavior which depend explicitly on the quantum mechanical nature of the phase ...

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• (2004)
The degree to which a pure quantum state is entangled can be characterized by the distance or angle to the nearest unentangled state. This geometric measure of entanglement is explored for bi-partite and multi-partite pure ...

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• (2006)
A major part of this work involves quantifying the effect of core-valence correlation via the CPP. The CPP is found to be important for accurate calculations of the total energy, and for excitations of atoms and small ...

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• (2009)
Finally, and most generally, autocorrelation times for energies and structural properties are very long, on the order of thousands of Monte Carlo cycles or picoseconds of Molecular Dynamics integration. Thus a great deal ...

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• (1996)
The goals of our research have been to: (i) expand the applicability of the quantum Monte Carlo (QMC) methods to larger molecular systems and check the reliability of traditional approaches, (ii) determine the impact of ...

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• (1994)
Quantum Monte Carlo techniques; in their various incarnations, calculate ground state or finite temperature properties of many-body quantum systems. We apply the path-integral Monte Carlo method to hydrogen at densities ...

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• (1995)
Quantum Monte Carlo has been established as a powerful computational tool to study quantum many-body systems. It has been successfully applied to small atoms and molecules, the electron gas, hydrogen at high pressures, ...

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• (1994)
Variational and Diffusion Monte Carlo are powerful computational methods which can afford accurate estimates of the ground state properties of quantum many-body problems. We have applied these Monte Carlo methods to the ...

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• (1994)
Quantum Monte Carlo has recently made great progress as a computational tool for quantum many-body systems. We have extended previous Monte Carlo methods to study both ground state and excited states of the two-dimensional ...

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• (2007)
Finally, we report simulations on small pH2 droplets at low temperatures. We reconcile two intriguing observations whereby the clusters appear to be superfluid and yet show evidence for solid-like order. We find magic ...

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• (2005)
Quantum Monte Carlo (QMC) is an extremely powerful method to treat many-body systems. Usually QMC has been applied in cases where the interaction potential has a simple analytic form, like the 1/r Coulomb potential. However, ...

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• (2002)
Quantum Monte Carlo (QMC) method is a powerful simulation tool for studying the properties of physical and chemical systems. The application of QMC to extended systems subjects to finite size effects because the simulation ...

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• (1996)
Recent experiments on high-density excitons in Cu$\sb2$O provide evidence for degenerate quantum statistics and Bose-Einstein condensation of this nearly ideal gas. We model the time dependence of this bosonic system ...

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• (1985)
The charge-density wave (CDW) dynamics of the linear chain compound orthorhombic TaS(,3) is characterized by extensive measurements of dc conductivity, ac admittance, direct mixing, harmonic mixing, second harmonic generation, ...

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• (1986)
This thesis describes a subset of phenomena at AlGaAs-GaAs heterointerfaces related to multiple quantum wells and modulation-doped structures. In the first section, two important results concerning multiple quantum well ...

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• (1995)
In this work we consider systems in which small normal-metal structures (N) are put into contact with a large superconductor (S), with the goal of spatially characterizing the superconductivity. Confined regions with ...

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• (1991)
The central work of this thesis is many-body Green's Function Method calculations in atoms using Hedin's GW approximation with various vertex corrections, leading to polarizabilities and quasiparticle energies, which are ...

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• (1964)

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