Informace o publikaci
Incompatibility of quantum instruments
| Autoři | |
|---|---|
| Rok publikování | 2024 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | QUANTUM |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | http://dx.doi.org/10.22331/q-2024-02-12-1246 |
| Doi | https://doi.org/10.22331/q-2024-02-12-1246 |
| Klíčová slova | quantum instruments |
| Popis | Quantum instruments describe outcome probability as well as state change induced by measurement of a quantum system. Incompatibility of two instruments, i. e. the impossibility to realize them simultaneously on a given quantum system, generalizes incompatibility of channels and incompatibility of positive operator -valued measures (POVMs). We derive implications of instrument compatibility for the induced POVMs and channels. We also study relation of instrument compatibility to the concept of non -disturbance. Finally, we prove equivalence between instrument compatibility and postprocessing of certain instruments, which we term complementary instruments. We illustrate our findings on examples of various classes of instruments. |
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