19 papers
Nonlinear dynamics in quantum physics- the study of quantum chaos
L. A. Caron, H. Kröger, X. Q. Luo +2
We use the quantum action to study the dynamics of quantum system at finite temperature. We construct the quantum action non-perturbatively and find temperature dependent action pa…
Parallel Computing on a PC Cluster
X. Q. Luo, E. B. Gregory, J. C. Yang +3
The tremendous advance in computer technology in the past decade has made it possible to achieve the performance of a supercomputer on a very small budget. We have built a multi-CP…
Algorithm for Computing Excited States in Quantum Theory
X. Q. Luo, H. Jirari, H. Kroger +1
Monte Carlo techniques have been widely employed in statistical physics as well as in quantum theory in the Lagrangian formulation. However, in the conventional approach, it is ext…
From Quantum Action to Quantum Chaos
H. Jirari, H. Kröger, G. Melkonyan +2
We have recently suggested a quantum action, which has the form of a classical action and takes into account quantum effects via renormalized action parameters. Here we apply it to…
Quantum Chaos at Finite Temperature - a New Approach via the Quantum Action
L. A. Caron, H. Jirari, H. Kröger +3
We address the problem of quantum chaos: Is there a rigorous, physically meaningful definition of chaos in quantum physics? Can the tools of classical chaos theory, like Lyapunov e…
Quantum Chaos at Finite Temperature
L. A. Caron, H. Jirari, H. Kröger +3
We use the quantum action to study quantum chaos at finite temperature. We present a numerical study of a classically chaotic 2-D Hamiltonian system - harmonic oscillators with anh…