Trigonometry of quantum states. (English) Zbl 1211.81024
Summary: Recently the geometry of quantum states has been under considerable development. Every good geometry deserves, if possible, an accompanying trigonometry. Here, I introduce such a trigonometry to accompany the geometry of quantum states.
MSC:
| 81P16 | Quantum state spaces, operational and probabilistic concepts |
| 81P40 | Quantum coherence, entanglement, quantum correlations |
| 97G60 | Plane and spherical trigonometry (educational aspects) |
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| [21] | Gustafson, K.: Unpublished notes |
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