Towards a Loophole-Free Test of Bell's Inequality with Entangled Pairs of Neutral Atoms
| Autor: | Wenjamin Rosenfeld, Florian Henkel, Harald Weinfurter, Michael Krug, Marek Zukowski, Markus Weber, Jürgen Volz, Adán Cabello |
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| Rok vydání: | 2009 |
| Předmět: |
Physics
Quantum Physics Health (social science) Photon General Computer Science Energetic neutral atom Spins General Mathematics Locality Detector General Engineering FOS: Physical sciences Quantum entanglement Polarization (waves) Education General Energy Hidden variable theory Quantum mechanics Quantum Physics (quant-ph) General Environmental Science |
| Zdroj: | Advanced Science Letters. 2:469-474 |
| ISSN: | 1936-7317 1936-6612 |
| Popis: | Experimental tests of Bell's inequality allow to distinguish quantum mechanics from local hidden variable theories. Such tests are performed by measuring correlations of two entangled particles (e.g. polarization of photons or spins of atoms). In order to constitute conclusive evidence, two conditions have to be satisfied. First, strict separation of the measurement events in the sense of special relativity is required ("locality loophole"). Second, almost all entangled pairs have to be detected (for particles in a maximally entangled state the required detector efficiency is 82.8%), which is hard to achieve experimentally ("detection loophole"). By using the recently demonstrated entanglement between single trapped atoms and single photons it becomes possible to entangle two atoms at a large distance via entanglement swapping. Combining the high detection efficiency achieved with atoms with the space-like separation of the atomic state detection events, both loopholes can be closed within the same experiment. In this paper we present estimations based on current experimental achievements which show that such an experiment is feasible in future. 6 pages, 3 figures, to be published in Advanced Science Letters |
| Databáze: | OpenAIRE |
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