Photonic Quantum Chromo-Dynamics
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866916276158332928 |
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| author | Saito, Shinichi |
| author_facet | Saito, Shinichi |
| contents | Vortexed photons with finite orbital angular momentum have a distinct mode profile with topological charge at the centre of the mode, while propagating in a certain direction. Each mode with different topological charge of $m$ is orthogonal, in the sense that the overlap integral vanishes among modes with different values of $m$. Here, we theoretically consider a superposition state among 3 different modes with left- and right-vorticies and a Gaussian mode without a vortex. These 3 states are considered to be assigned to different quantum states, thus, we have employed the $\mathfrak{su}(3)$ Lie algebra and the associated SU(3) Lie group to classify the photonic states. We have calculated expectation values of 8 generators of the $\mathfrak{su}(3)$ Lie algebra, which should be observable, since the generators are Hermite. We proposed to call these parameters as Gell-Mann parameters, named after the theoretical physicist, Murray Gell-Mann, who established Quantum Chromo-Dynamics (QCD) for quarks. The Gell-Mann parameters are represented on the 8-dimensional hypersphere with its radius fixed due to the conservation law of the Casimir operator. We have discussed a possibility to explore photonic QCD in experiments and classified SU(3) states to embed the parameters in SO(6) and SO(5). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2304_01217 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Photonic Quantum Chromo-Dynamics Saito, Shinichi Optics Quantum Physics Vortexed photons with finite orbital angular momentum have a distinct mode profile with topological charge at the centre of the mode, while propagating in a certain direction. Each mode with different topological charge of $m$ is orthogonal, in the sense that the overlap integral vanishes among modes with different values of $m$. Here, we theoretically consider a superposition state among 3 different modes with left- and right-vorticies and a Gaussian mode without a vortex. These 3 states are considered to be assigned to different quantum states, thus, we have employed the $\mathfrak{su}(3)$ Lie algebra and the associated SU(3) Lie group to classify the photonic states. We have calculated expectation values of 8 generators of the $\mathfrak{su}(3)$ Lie algebra, which should be observable, since the generators are Hermite. We proposed to call these parameters as Gell-Mann parameters, named after the theoretical physicist, Murray Gell-Mann, who established Quantum Chromo-Dynamics (QCD) for quarks. The Gell-Mann parameters are represented on the 8-dimensional hypersphere with its radius fixed due to the conservation law of the Casimir operator. We have discussed a possibility to explore photonic QCD in experiments and classified SU(3) states to embed the parameters in SO(6) and SO(5). |
| title | Photonic Quantum Chromo-Dynamics |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2304.01217 |