Quantum Speed Limit for Time-Fractional Open Systems

• URL: http://arxiv.org/abs/2305.00270v2
• Date: Tue, 9 May 2023 08:14:35 GMT
• Title: Quantum Speed Limit for Time-Fractional Open Systems
• Authors: Dongmei Wei, Hailing Liu, Yongmei Li, Fei Gao, Sujuan Qin, Qiaoyan Wen
• Abstract summary: The Quantum Speed Limit (QSL) time captures the shortest time required for a quantum system to evolve between two states. It is shown that the non-Markovian memory effects of the environment can accelerate the time-fractional quantum evolution. A method to manipulate the non-Markovian dissipative dynamics of a time-fractional open quantum system is presented.
• Score: 4.501305807267217
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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