Publications

At the Yang-Lee edge singularity, finite-size scaling behavior is used to measure the low-lying excitation spectrum of the Ising quantum spin chain for free boundary conditions.

This paper studies the Yang-Lee edge singularity of 2-dimensional(2D) Ising model through a quantum spin chain.

We consider spatially localized and time periodic solutions to discrete extended Hamiltonian dynamical systems (coupled systems of infinitely many "oscillations" which conserve total energy).

Stability properties of hydromagnetic Alfven Waves with large- m (East-Wave) wave numbers are investigated via an eigenmode analysis.

The valence electrons in sp(3) hybridized semiconductors are strongly delocalized.

We study ultrafast relaxation processes of odd (B sub u) and even parity (A sub g) exciton states in poly(p-phenylene vinylene) derivatives.

The electronic spectroscopy and photodissociation dynamics of the I-3 radical are investigated with two experimental methods.

We have used Gutzwiller's variational method to study the metal- insulator transition in a modified Hubbard model with low-lying excited states, and one electron per site.

Heavy and light hole exciton transitions were observed from isolated quantum wells in two wafers of Al sub (0.4) Ga sub (0.6) As/GaAs produced by molecular beam epitaxy using interrupted growth at

We have investigated Cd sub x Zn sub (1-x) Te/ZnTe MQWs using absorption techniques. We have observed sharp excitonic features at low temperatures which strongly broaden at room temperature.