Simulation of Quantum and Artificial Systems

David M. Ceperley

Maxim Secor, Alexander V. Soudackov, Sharon Hammes‐Schiffer

The utilization of artificial neural networks (ANNs) provides strategies for accelerating molecular simulations. Herein, ANNs are implemented as propagators of the time-dependent Schrödinger equation to simulate the quantum dynamics of systems with time-dependent potentials. These ANN propagators are trained to map nonstationary wavepackets from a given time to a future time within the discrete variable representation. Each propagator is trained for a specified time step, and iterative application of the propagator enables the propagation of wavepackets over long time scales. Such ANN propagators are developed and applied to one- and two-dimensional proton transfer systems, which exhibit nuclear quantum effects such as hydrogen tunneling. These ANN propagators are trained for either a specific time-independent potential or general potentials that can be time-dependent. Hierarchical, multiple time step algorithms enable parallelization, and the extension to higher dimensions is straightforward. This strategy is applicable to quantum dynamical simulations of diverse chemical and biological processes.

Jing Mu, Xia Jia

Aimming at the severe security threat faced by information transmission in wireless communication, the artificial interference in physical layer security technology was considered, and the influence of artificial interference signal style on system information transmission security was analyzed by simulation, which provided technical accumulation for the design of wireless security transmission system based on artificial interference.

Hans A. De Raedt, Kristel F. L. Michielsen, Anthony Hams +2 more

A. N. Sultanov, Ya. S. Greenberg, D. S. Karpov +2 more

In this paper we show a transport characteristic for a system, containing two distanced resonators with artificial atoms inside. The artificial atoms can be realized as superconducting quantum bits performing two level system properties. A fully quantum-mechanical approach is used. We have numerically simulated a transmission through the system with weak and strong couplings. The criteria to observe wavefunction interferences at amplitude-frequency responses was found.