Optimized sideband cooling with initial system correlations in non-Markovian regime

• URL: http://arxiv.org/abs/2007.14094v2
• Date: Thu, 23 Nov 2023 07:43:16 GMT
• Title: Optimized sideband cooling with initial system correlations in non-Markovian regime
• Authors: Wen-Zhao Zhang, Ting Tan, Jie Zhao, Wenlin Li, and Jiong Cheng
• Abstract summary: We study the evolution of phonon number by incorporating the effects of initial correlations into the Heisenberg equation. Our results show that the instantaneous phonon number can be significantly reduced by introducing either the parametric-amplification type or the beam-splitter type initial correlations.
• Score: 1.8767214564678356
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: An optimized sideband cooling in the presence of initial system correlations is investigated for a standard optomechanical system coupled to a general mechanical non-Markovian reservoir. We study the evolution of phonon number by incorporating the effects of initial correlations into the time-dependent coefficients in the Heisenberg equation. We introduce the concept of cooling rate and define an average phonon reduction function to describe the sideband cooling effect in non-Markovian regime. Our results show that the instantaneous phonon number can be significantly reduced by introducing either the parametric-amplification type or the beam-splitter type initial correlations. In addition, the ground state cooling rate can be accelerated by enhancing the initial correlation of beam-splitter type. By optimizing the initial state of the system and utilizing Q-modulation technology, a stable mechanical ground state can be obtained in a very short time. Our optimized cooling protocol provides an appealing platform for phonon manipulation and quantum information processing in solid-state systems.

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