Simulations of ‘decoherence’ with noise pulses

Abstract

A simulation of decoherence as random noise in the Hamiltonian is studied. The full Hamiltonian for the rf Squid is used, with the parameters chosen such that there is a double-potential well configuration where the two quasi-degenerate lowest levels are well separated from the rest. The results for these first two levels are in quantitative agreement with expectations from the ‘spin 1/2’ picture for the behaviour of a two-state system.

Keywords:

• Decoherence
• Noise pulses
• Simulations

Acknowledgements

The numerical work is based on the methods of J. Wosiek 8 as developed into a very useful program package by A. Görlich and P. Korcyl, students at the Jagellonian University, Cracow.