Experimental hierarchy of the nonclassicality of single-qubit states via potentials for entanglement, steering, and Bell nonlocality
| Autor: | Kadlec, Josef, Bartkiewicz, Karol, Černoch, Antonín, Lemr, Karel, Miranowicz, Adam |
|---|---|
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Opt. Express 32, 2333-2346 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/OE.506169 |
| Popis: | Entanglement potentials are a promising way to quantify the nonclassicality of single-mode states. They are defined by the amount of entanglement (expressed by, e.g., the Wootters concurrence) obtained after mixing the examined single-mode state with a purely classical state; such as the vacuum or a coherent state. We generalize the idea of entanglement potentials to other quantum correlations: the EPR steering and Bell nonlocality, thus enabling us to study mutual hierarchies of these nonclassicality potentials. Instead of the usual vacuum and one-photon superposition states, we experimentally test this concept using specially tailored polarization-encoded single-photon states. One polarization encodes a given nonclassical single-mode state, while the other serves as the vacuum place-holder. This technique proves to be experimentally more convenient in comparison to the vacuum and a one-photon superposition as it does not require the vacuum detection. Comment: 14 pages, 4 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|