Accessible information of a general quantum Gaussian ensemble
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arXiv
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| Format: | Preprint |
| Veröffentlicht: |
2021
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| _version_ | 1866908508816932864 |
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| author | Holevo, A. S. |
| author_facet | Holevo, A. S. |
| contents | Accessible information, which is a basic quantity in quantum information theory, is computed for a general quantum Gaussian ensemble under certain "threshold condition". It is shown that the maximizing measurement is Gaussian, constituting a far-reaching generalization of the optical heterodyning. This substantially extends the previous result concerning the gauge-invariant case, even for a single bosonic mode. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2102_01981 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Accessible information of a general quantum Gaussian ensemble Holevo, A. S. Quantum Physics Accessible information, which is a basic quantity in quantum information theory, is computed for a general quantum Gaussian ensemble under certain "threshold condition". It is shown that the maximizing measurement is Gaussian, constituting a far-reaching generalization of the optical heterodyning. This substantially extends the previous result concerning the gauge-invariant case, even for a single bosonic mode. |
| title | Accessible information of a general quantum Gaussian ensemble |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2102.01981 |