Nonclassical phonon pair
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914066744737792 |
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| author | Wang, Yu Shen, Zhen Zhang, Mai Shi, Zhi-Peng Kuang, Hong-Yi Wan, Shuai Sun, Fang-Wen Guo, Guang-Can Dong, Chun-Hua |
| author_facet | Wang, Yu Shen, Zhen Zhang, Mai Shi, Zhi-Peng Kuang, Hong-Yi Wan, Shuai Sun, Fang-Wen Guo, Guang-Can Dong, Chun-Hua |
| contents | Quantum-correlated photon pairs are crucial resources for modern quantum information science. Similarly, the reliable generation of nonclassical phonon pairs is vital for advancing engineerable solid-state quantum devices and hybrid quantum networks based on phonons. Here, we present a novel approach to generate quantum-correlated phonon pairs in a suspended silicon microstructure initialized in its motional ground state. By simultaneously implementing red- and blue-detuned laser pulses, equivalent high-order optomechanical nonlinearity -- specifically, an effective optomechanical four-wave mixing process -- is achieved for generating a nonclassical phonon pair, which is then read out via a subsequent red-detuned pulse. We demonstrate the nonclassical nature of the generated phonon pair through the violation of the Cauchy-Schwarz inequality. Our experimentally observed phonon pair violates the classical bound by more than 5 standard deviations and maintains a decoherence time of 132 ns. This work reveals novel quantum manipulation of phonon states enabled by equivalent high-order optomechanical nonlinearity within a pulse scheme and provides a valuable quantum resource for mechanical quantum computing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_24429 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nonclassical phonon pair Wang, Yu Shen, Zhen Zhang, Mai Shi, Zhi-Peng Kuang, Hong-Yi Wan, Shuai Sun, Fang-Wen Guo, Guang-Can Dong, Chun-Hua Quantum Physics Quantum-correlated photon pairs are crucial resources for modern quantum information science. Similarly, the reliable generation of nonclassical phonon pairs is vital for advancing engineerable solid-state quantum devices and hybrid quantum networks based on phonons. Here, we present a novel approach to generate quantum-correlated phonon pairs in a suspended silicon microstructure initialized in its motional ground state. By simultaneously implementing red- and blue-detuned laser pulses, equivalent high-order optomechanical nonlinearity -- specifically, an effective optomechanical four-wave mixing process -- is achieved for generating a nonclassical phonon pair, which is then read out via a subsequent red-detuned pulse. We demonstrate the nonclassical nature of the generated phonon pair through the violation of the Cauchy-Schwarz inequality. Our experimentally observed phonon pair violates the classical bound by more than 5 standard deviations and maintains a decoherence time of 132 ns. This work reveals novel quantum manipulation of phonon states enabled by equivalent high-order optomechanical nonlinearity within a pulse scheme and provides a valuable quantum resource for mechanical quantum computing. |
| title | Nonclassical phonon pair |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2509.24429 |