Quantum Back Action Evasion with Reservoir Engineering

• URL: http://arxiv.org/abs/2505.01013v1
• Date: Fri, 02 May 2025 05:25:52 GMT
• Title: Quantum Back Action Evasion with Reservoir Engineering
• Authors: Yohei Nishino, James W. Gardner, Yanbei Chen, Kentaro Somiya,
• Abstract summary: We propose a back-action evading scheme for a free mass that combines reservoir engineering with velocity measurement.<n>The underlying principle follows the double-pass-type speed meter, which measures the mirror's velocity using a nonreciprocal interaction.<n>We show that reservoir engineering can reproduce the double-pass speed meter with optimal feedforward, using only reciprocal interactions.
• Score: 11.118338267742097
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose a back-action evading scheme for a free mass that combines reservoir engineering with velocity measurement. The underlying principle follows the double-pass-type speed meter, which measures the mirror's velocity using a nonreciprocal interaction. In our method, the nonreciprocal coupling is realized through reservoir engineering, following the recipe proposed in [Phys. Rev. X 5, 021025]. We show that reservoir engineering can reproduce the double-pass speed meter with optimal feedforward, using only reciprocal interactions. The resulting force sensitivity surpasses the standard quantum limit, providing an alternative route to quantum back-action evasion in cavity optomechanical systems.

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