Quantum vampire: collapse-free action at a distance by the photon annihilation operator
| Autor: | Fedorov, Ilya A., Ulanov, Alexander E., Kurochkin, Yury V., Lvovsky, A. I. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Optica 2, 112 - 115 (2015) |
| Druh dokumentu: | Working Paper |
| Popis: | A nonclassical state of light is distributed, via a beam splitter, between two remote parties. One of the parties applies the photon annihilation operator to its portion of the state. Surprisingly, this local intervention removes a photon from the entire initial state, leaving its mode as well as the spatial and temporal structure undisturbed. In this way, nonlocal quantum action-at-a-distance occurs without local state collapse by either party. This leads to curious consequences, such as the absence of a shadow when the annihilation operator is applied to a part of the spatial cross-section of the initial optical mode. In the experiment, we subtract a single photon from a part of an optical mode initially prepared in the one- or two-photon Fock state. Subsequent homodyne tomography reveals that the whole mode has jumped to the next lower Fock state, with no change in the mode shape. Comment: 4 pages, 3 figures |
| Databáze: | arXiv |
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