Can We Observe the Gravitational Quantum States of Positronium?
We consider the feasibility of observing the gravitational quantum states of positronium. The proposed scheme employs the flow-throw technique used for the first observation of this effect with neutrons. Collimation and Stark deceleration of Rydberg positronium atoms allow selecting the required vel...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2015/173572 |
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| author | P. Crivelli V. V. Nesvizhevsky A. Yu. Voronin |
| author_facet | P. Crivelli V. V. Nesvizhevsky A. Yu. Voronin |
| author_sort | P. Crivelli |
| collection | DOAJ |
| description | We consider the feasibility of observing the gravitational quantum states of positronium. The proposed scheme employs the flow-throw technique used for the first observation of this effect with neutrons. Collimation and Stark deceleration of Rydberg positronium atoms allow selecting the required velocity class. If this experiment could be realized with positronium, it would lead to a determination of g for this matter-antimatter system at the few % level. As discussed in this contribution, most of the required techniques are currently available but important milestones have to be demonstrated experimentally before such an experiment could become reality. Those are the efficient focusing of a bunched positron beam, Stark deceleration of Rydberg positronium, and its subsequent excitation into states with large angular momentum. We provide an estimate of the efficiencies we expect for these steps and assuming those could be confirmed we calculate the signal rate. |
| format | Article |
| id | doaj-art-96e8cd869a044ca68c140083e0382851 |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-96e8cd869a044ca68c140083e03828512025-02-03T01:25:34ZengWileyAdvances in High Energy Physics1687-73571687-73652015-01-01201510.1155/2015/173572173572Can We Observe the Gravitational Quantum States of Positronium?P. Crivelli0V. V. Nesvizhevsky1A. Yu. Voronin2ETH Zurich, Institute for Particle Physics, Otto-Stern-Weg 5, 8093 Zurich, SwitzerlandInstitut Laue-Langevin, 6 rue Jules Horowitz, 38046 Grenoble, FranceLebedev Physical Institute, 53 Leninsky Prospect, Moscow 119991, RussiaWe consider the feasibility of observing the gravitational quantum states of positronium. The proposed scheme employs the flow-throw technique used for the first observation of this effect with neutrons. Collimation and Stark deceleration of Rydberg positronium atoms allow selecting the required velocity class. If this experiment could be realized with positronium, it would lead to a determination of g for this matter-antimatter system at the few % level. As discussed in this contribution, most of the required techniques are currently available but important milestones have to be demonstrated experimentally before such an experiment could become reality. Those are the efficient focusing of a bunched positron beam, Stark deceleration of Rydberg positronium, and its subsequent excitation into states with large angular momentum. We provide an estimate of the efficiencies we expect for these steps and assuming those could be confirmed we calculate the signal rate.http://dx.doi.org/10.1155/2015/173572 |
| spellingShingle | P. Crivelli V. V. Nesvizhevsky A. Yu. Voronin Can We Observe the Gravitational Quantum States of Positronium? Advances in High Energy Physics |
| title | Can We Observe the Gravitational Quantum States of Positronium? |
| title_full | Can We Observe the Gravitational Quantum States of Positronium? |
| title_fullStr | Can We Observe the Gravitational Quantum States of Positronium? |
| title_full_unstemmed | Can We Observe the Gravitational Quantum States of Positronium? |
| title_short | Can We Observe the Gravitational Quantum States of Positronium? |
| title_sort | can we observe the gravitational quantum states of positronium |
| url | http://dx.doi.org/10.1155/2015/173572 |
| work_keys_str_mv | AT pcrivelli canweobservethegravitationalquantumstatesofpositronium AT vvnesvizhevsky canweobservethegravitationalquantumstatesofpositronium AT ayuvoronin canweobservethegravitationalquantumstatesofpositronium |