Fast Generation of High-Fidelity Mechanical Non-Gaussian States via Additional Amplifier and Photon Subtraction

• URL: http://arxiv.org/abs/2211.00976v2
• Date: Thu, 7 Sep 2023 04:36:21 GMT
• Title: Fast Generation of High-Fidelity Mechanical Non-Gaussian States via Additional Amplifier and Photon Subtraction
• Authors: Dong-Long Hu, Jia-Jin Zou, Feng-Xiao Sun, Jie-Qiao Liao, Qiongyi He, Ze-Liang Xiang
• Abstract summary: Non-Gaussian states (NGSs) with higher-order correlation properties have wide-range applications in quantum information processing. We propose a protocol to faithfully generate two types of mechanical NGSs, i.e., Schr"odinger cat states and Fock states, in open optomechanical systems.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Non-Gaussian states (NGSs) with higher-order correlation properties have wide-range applications in quantum information processing. However, the generation of such states with high quality still faces practical challenges. Here, we propose a protocol to faithfully generate two types of mechanical NGSs, i.e., Schr\"{o}dinger cat states and Fock states, in open optomechanical systems, even when the cooperativity is smaller than one ($g^2/\kappa\gamma<1$). In contrast to the usual scheme, a short squeezed field is pumped to rapidly entangle with a mechanical resonator via a beam-splitter-like optomechanical interaction, effectively reducing the mechanical decoherence. Furthermore, by performing an additional amplifier and a following multi photon subtraction on the entangled optical field, one can selectively obtain the high-fidelity mechanical cat and Fock states. This protocol is robust to various imperfections, allowing it to be implemented with state-of-the-art experimental systems with close to unit fidelity. Moreover, it can be extended to generate a four-component cat state and provide possibilities for future quantum applications of NGSs.

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