# Browse Dissertations and Theses - Physics by Title

• (1999)
Quantum Monte Carlo (QMC) is one of the most powerful methods for solving many body problems in Physics and Chemistry. MC sampling allows one to measure physical properties systems with very complicated wave functions that ...

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• (2001)
The second system we have studied is a set of idealized (harmonic) and realistic quantum dots. Two idealized dots, spherical and squashed, quasi-2D structures, are analyzed. In the first QMC is contrasted with a large set ...

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• (1995)
Acoustic wave propagation is studied via imaging techniques in two regimes not previously amenable to such experiments. (I) The low-temperature phonon-imaging technique is extended to ultrasonic frequencies at room ...

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• (2006-10)

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• (2002)
We present a mechanism for adaptation in dynamical systems. Systems which have this mechanism are called called self-adjusting systems. The control parameters in a self-adjusting system are slowly varying, rather ...

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• (1955)

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• (2007)
In addition to implementing these protocols, we have improved several resources for quantum communication and quantum computing. Specifically, we have developed improved sources of polarization-entangled photons, a low-loss ...

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• (2006)
After describing these advancements in methodology, we apply our new technology to fluid sodium near its liquid-vapor critical point. In particular, we explore the microscopic mechanisms which drive the continuous change ...

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• (2006-10)
Path integral Monte Carlo (PIMC) is a quantum-level simulation method based on a stochastic sampling of the many-body thermal density matrix. Utilizing the imaginary-time formulation of Feynman's sum-over-histories, it ...

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• (2006-10)
Relaxor ferroelectrics are disordered crystalline materials whose polar order is limited to mesoscopic-scaled nanodomains. There is no ferroelectric phase transition, but a faster than Arrhenius cooperative freezing into ...

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• (2005)
Using Hamiltonian methodology, we clarified a common misunderstanding of the origin of kinematic drifts. We studied the weakly nonlinear interactions between linear Alfven-Rossby waves. We used a spherical harmonic ...

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• (1954)

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• (1957)

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• (1983)

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• (1983)
The formulation of a theory of star formation faces two fundamental problems: (i) the angular momentum problem, and (ii) the magnetic flux problem. We have previously emonstrated by detailed calculations that magnetic ...

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• (2000)
Amplitude analysis of the D+,D+s→ K-K+p+ and D0→KosK+K - final states are presented using the data collected by the Fermilab high energy photoproduction experiment E831(FOCUS), during 96--97. Our data are ...

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• (2000-10)

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• (1972)

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• (1972)

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• (1975)

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