Autonomous Stabilization of Fock States in an Oscillator against Multiphoton Losses
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arXiv
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| Format: | Preprint |
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2023
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| author | Li, Sai Ni, Zhongchu Zhang, Libo Cai, Yanyan Mai, Jiasheng Wen, Shengcheng Zheng, Pan Deng, Xiaowei Liu, Song Xu, Yuan Yu, Dapeng |
| author_facet | Li, Sai Ni, Zhongchu Zhang, Libo Cai, Yanyan Mai, Jiasheng Wen, Shengcheng Zheng, Pan Deng, Xiaowei Liu, Song Xu, Yuan Yu, Dapeng |
| contents | Fock states with a well-defined number of photons in an oscillator have shown a wide range of applications in quantum information science. Nonetheless, their usefulness has been marred by single and multiple photon losses due to unavoidable environment-induced dissipation. Though several dissipation engineering methods have been developed to counteract the leading single-photon loss error, averting multiple photon losses remains elusive. Here, we experimentally demonstrate a dissipation engineering method that autonomously stabilizes multi-photon Fock states against losses of multiple photons using a cascaded selective photon-addition operation in a superconducting quantum circuit. Through measuring the photon-number populations and Wigner tomography of the oscillator states, we observe a prolonged preservation of nonclassical Wigner negativities for the stabilized Fock states $\vert N\rangle$ with $N=1,2,3$ for a duration of about 10 ms. Furthermore, the dissipation engineering method demonstrated here also facilitates the implementation of a non-unitary operation for resetting a binomially-encoded logical qubit. These results highlight potential applications in error-correctable quantum information processing against multi-photon-loss errors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_08296 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Autonomous Stabilization of Fock States in an Oscillator against Multiphoton Losses Li, Sai Ni, Zhongchu Zhang, Libo Cai, Yanyan Mai, Jiasheng Wen, Shengcheng Zheng, Pan Deng, Xiaowei Liu, Song Xu, Yuan Yu, Dapeng Quantum Physics Fock states with a well-defined number of photons in an oscillator have shown a wide range of applications in quantum information science. Nonetheless, their usefulness has been marred by single and multiple photon losses due to unavoidable environment-induced dissipation. Though several dissipation engineering methods have been developed to counteract the leading single-photon loss error, averting multiple photon losses remains elusive. Here, we experimentally demonstrate a dissipation engineering method that autonomously stabilizes multi-photon Fock states against losses of multiple photons using a cascaded selective photon-addition operation in a superconducting quantum circuit. Through measuring the photon-number populations and Wigner tomography of the oscillator states, we observe a prolonged preservation of nonclassical Wigner negativities for the stabilized Fock states $\vert N\rangle$ with $N=1,2,3$ for a duration of about 10 ms. Furthermore, the dissipation engineering method demonstrated here also facilitates the implementation of a non-unitary operation for resetting a binomially-encoded logical qubit. These results highlight potential applications in error-correctable quantum information processing against multi-photon-loss errors. |
| title | Autonomous Stabilization of Fock States in an Oscillator against Multiphoton Losses |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2308.08296 |