title: 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.
authors.affiliation: State Key Laboratory of Low-dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China.
authors.forename: Chao
authors.initials: C
authors.lastname: Zheng
authors.forename: Liang
authors.initials: L
authors.lastname: Hao
authors.forename: Gui Lu
authors.initials: GL
authors.lastname: Long