Observation of a fast evolution in a parity-time-symmetric system

Abstract

In parity-time-symmetric (PT -symmetric) Hamiltonian theory, the optimal evolution time can be reduced drastically and can even be zero. In this article, we report our experimental simulation of the fast evolution of a PT -symmetric Hamiltonian in a nuclear magnetic resonance quantum system. The experimental results demonstrate that the PT - symmetric Hamiltonian system can indeed evolve much faster than the quantum system, and the evolution time can be arbitrarily close to zero. © 2013 The Author(s) Published by the Royal Society. All rights reserved.