Simultaneous measurement of multimode squeezing
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866910878327111680 |
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| author | Barakat, Ismail Kalash, Mahmoud Scharwald, Dennis Sharapova, Polina Lindlein, Norbert Chekhova, Maria |
| author_facet | Barakat, Ismail Kalash, Mahmoud Scharwald, Dennis Sharapova, Polina Lindlein, Norbert Chekhova, Maria |
| contents | Multimode squeezed light is an increasingly popular tool in photonic quantum technologies, including sensing, imaging, and computation. Meanwhile, the existing methods of its characterization are technically complicated, and in the best case, deal with a single mode at a time. Here, we demonstrate experimentally how the squeezing can be measured in multiple spatial modes simultaneously, using optical parametric amplification and direct detection followed by modal decomposition based on spatial intensity correlations. We apply this method to a multimode squeezed vacuum generated via high-gain parametric down-conversion. We measure the degrees of squeezing and anti-squeezing for eight strongest spatial modes, obtaining highest squeezing and anti-squeezing values of $-5.2 \pm 0.2$ dB and $8.6 \pm 0.3$ dB, respectively. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_15786 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Simultaneous measurement of multimode squeezing Barakat, Ismail Kalash, Mahmoud Scharwald, Dennis Sharapova, Polina Lindlein, Norbert Chekhova, Maria Quantum Physics Multimode squeezed light is an increasingly popular tool in photonic quantum technologies, including sensing, imaging, and computation. Meanwhile, the existing methods of its characterization are technically complicated, and in the best case, deal with a single mode at a time. Here, we demonstrate experimentally how the squeezing can be measured in multiple spatial modes simultaneously, using optical parametric amplification and direct detection followed by modal decomposition based on spatial intensity correlations. We apply this method to a multimode squeezed vacuum generated via high-gain parametric down-conversion. We measure the degrees of squeezing and anti-squeezing for eight strongest spatial modes, obtaining highest squeezing and anti-squeezing values of $-5.2 \pm 0.2$ dB and $8.6 \pm 0.3$ dB, respectively. |
| title | Simultaneous measurement of multimode squeezing |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2402.15786 |