Quantum speed limit of a single atom in a squeezed optical cavity mode

• URL: http://arxiv.org/abs/2310.15554v1
• Date: Tue, 24 Oct 2023 06:52:27 GMT
• Title: Quantum speed limit of a single atom in a squeezed optical cavity mode
• Authors: Ya-Jie Ma, Xue-Chen Gao, Shao-Xiong Wu, and Chang-shui Yu
• Abstract summary: We study the quantum speed limit of a single atom trapped in a Fabry-Perot microresonator. The analytical expression of evolved atom state can be obtained by using the non-Hermitian Schr"odinger equation.
• Score: 0.0937465283958018
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We theoretically study the quantum speed limit of a single atom trapped in a Fabry-Perot microresonator. The cavity mode will be squeezed when a driving laser is applied to the second-order nonlinear medium, and the effective Hamiltonian can be obtained under the Bogoliubov squeezing transformation. The analytical expression of evolved atom state can be obtained by using the non-Hermitian Schr\"{o}dinger equation for the initial excited state, and the quantum speed limit time coincides very well for both the analytical expression and the master equation method. From the perspective of quantum speed limit, it is more conducive to accelerate the evolution of the quantum state for the large detuning, strong driving and coupling strength. For the initial superposition state case, the form of initial state has more influence on the evolution speed. The quantum speed limit time is not only dependent on the system parameters but also determined by the initial state.

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