Quantum Speed Limit for Time-Fractional Open Systems
Abstract
The Time-Fractional Schr\"odinger Equation (TFSE) is well-adjusted to study a quantum system interacting with its dissipative environment. The Quantum Speed Limit (QSL) time captures the shortest time required for a quantum system to evolve between two states, which is significant for evaluating the maximum speed in quantum processes. In this work, we solve exactly for a generic time-fractional single qubit open system by applying the TFSE to a basic open quantum system model, namely the resonant dissipative Jaynes-Cummings (JC) model, and investigate the QSL time for the system. It is shown that the non-Markovian memory effects of the environment can accelerate the time-fractional quantum evolution, thus resulting in a smaller QSL time. Additionally, the condition for the acceleration evolution of the time-fractional open quantum system at a given driving time, i.e., a tradeoff among the fractional order, coupling strength, and photon number, is brought to light. In particular, a method to manipulate the non-Markovian dissipative dynamics of a time-fractional open quantum system by adjusting the fractional order for a long driving time is presented.
Keywords
Cite
@article{arxiv.2305.00270,
title = {Quantum Speed Limit for Time-Fractional Open Systems},
author = {Dongmei Wei and Hailing Liu and Yongmei Li and Fei Gao and Sujuan Qin and Qiaoyan Wen},
journal= {arXiv preprint arXiv:2305.00270},
year = {2023}
}