Browsing by Author "Chin, Siu A."
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Chen, Xianjin (20090515)We study computational theory and methods for finding multiple unstable solutions (corresponding to saddle points) to three types of nonlinear variational elliptic systems: cooperative, noncooperative, and Hamiltonian. We ...

Chin, Siu A.; Ashour, Omar A.; Belić, Milivoj R. (Physical Review E  Statistical, Nonlinear, and Soft Matter Physics, 2015)

Urtekin, Kerim (Texas A&M University, 20070425)It is generally believed that the old quantum theory, as presented by Niels Bohr in 1913, fails when applied to manyelectron systems, such as molecules, and nonhydrogenic atoms. It is the central theme of this dissertation ...

Complete characterization of fourthorder symplectic integrators with extendedlinear coefficients Chin, Siu A. (Physical Review E  Statistical, Nonlinear, and Soft Matter Physics, 2006)

Aichinger, M.; Chin, Siu A.; Krotscheck, E.; Rasanen, E. (American Physical Society, 2006)We investigate the effects of impurities and changing ring geometry on the energetics of quantum rings under different magnetic field strengths. We show that as the magnetic field and/or the electron number are/is increased, ...

Chin, Siu A. (Physical Review E  Statistical, Nonlinear, and Soft Matter Physics, 2009)

Kaya, Necati (20141021)Present laser technology allows the production of ultrashort and intense laser pulses. When matter is exposed to the laser field of such pulses, it exhibits highly nonlinear phenomena that find applications in many fields. ...

Chin, Siu A.; Krotscheck, Eckhard (Physical Review E  Statistical, Nonlinear, and Soft Matter Physics, 2005)

Forbert, HA; Chin, Siu A. (American Physical Society, 2001)By decomposing the important sampled imaginary time Schrodinger evolution operator to fourth order with positive coefficients, we derived a number of distinct fourthorder diffusion Monte Carlo algorithms. These sophisticated ...

Chin, Siu A. (Physical Review E  Statistical, Nonlinear, and Soft Matter Physics, 2015)

Chin, Siu A. (Physical Review E  Statistical, Nonlinear, and Soft Matter Physics, 2007)

Zhu, Feng (20120214)A detailed investigation of ion crystals produced by laser and sympathetic cooling in a linear RF trap has been conducted. The laser cooling methods were examined and applied to the trapped ^24Mg^(positive) ions. The ...

Ashour, Omar A. (20170427)In this work, we present fully periodic breathers of the nonlinear Schrodinger equation (NLSE) on both constant and elliptical dnfunction backgrounds. The breathers can be generated under two conditions 1) the periods of ...

Wu, Yik Chung (Texas A&M University, 20051101)In this dissertation, the problem of symbol timing synchronization for the following three different communication systems is studied: 1) conventional singlecarrier transmissions with single antenna in both transmitter ...

Wang, Changchun (20120716)Variational structure plays an important role in critical point theory and methods. However many differential problems are nonvariational i.e. they are not the Euler Lagrange equations of any variational functionals, ...

Chin, Siu A. (Physical Review E  Statistical, Nonlinear, and Soft Matter Physics, 2007)

Chin, Siu A. (American Physical Society, 1990)The diffusion Monte Carlo algorithm with and without importance sampling is analyzed in terms of the algorithm's underlying transfer matrix. The crucial role played by the Langevin algorithm in the importancesampling ...

Ciftja, O.; Chin, Siu A. (American Physical Society, 2003)The exact ground state of a strongly interacting quantum manybody system can be obtained by evolving a trial state with finite overlap with the ground state to infinite imaginary time. In many cases, since the convergence ...

Grasbon, F.; Paulus, Gerhard G.; Chin, Siu A.; Walther, H.; MuthBohm, J.; Becker, A.; Faisal, F. H. M. (American Physical Society, 2001)

Chin, Siu A.; KROTSCHECK, E. (American Physical Society, 1992)We compute zerotemperature groundstate energies, one and twobody densities, collectiveexcitation spectra, transition densities, and static and dynamic structure functions of He4 clusters up to a cluster size of N = ...