Photon number projective measurement in Schrödinger cat quantum state preparation procedure after parametric down-conversion interaction
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arXiv
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866910071535960064 |
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| author | Gorshenin, V. L. |
| author_facet | Gorshenin, V. L. |
| contents | Schrödinger-cat (SC) states are an important resource for continuous-variable quantum computing and quantum metrology. In our previous work [JOSA B, 42, 2 (2025)], we proposed a probabilistic protocol for generating bright squeezed SC states via degenerate spontaneous parametric down-conversion (SPDC) with pump depletion, followed by projective measurement of the pump mode. In the present work, we formulate a general theoretical description of SPDC with pump depletion, introduce an efficient numerical method for computing its dynamics, and develop a practical version of the protocol proposed in [JOSA B, 42, 2 (2025)]. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_02201 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Photon number projective measurement in Schrödinger cat quantum state preparation procedure after parametric down-conversion interaction Gorshenin, V. L. Quantum Physics Schrödinger-cat (SC) states are an important resource for continuous-variable quantum computing and quantum metrology. In our previous work [JOSA B, 42, 2 (2025)], we proposed a probabilistic protocol for generating bright squeezed SC states via degenerate spontaneous parametric down-conversion (SPDC) with pump depletion, followed by projective measurement of the pump mode. In the present work, we formulate a general theoretical description of SPDC with pump depletion, introduce an efficient numerical method for computing its dynamics, and develop a practical version of the protocol proposed in [JOSA B, 42, 2 (2025)]. |
| title | Photon number projective measurement in Schrödinger cat quantum state preparation procedure after parametric down-conversion interaction |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2507.02201 |