Observation of atom wave phase shifts induced by van der Waals atom-surface interactions
The development of nanotechnology and atom optics relies on understanding how atoms behave and interact with their environment. Isolated atoms can exhibit wavelike (coherent) behavior with a corresponding de Broglie wavelength and phase which can be affected by nearby surfaces. Here an atom interfer...
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| Veröffentlicht in: | Physical review letters 2005-09, Vol.95 (13), p.133201.1-133201.4, Article 133201 |
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| container_end_page | 133201.4 |
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| container_issue | 13 |
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| container_title | Physical review letters |
| container_volume | 95 |
| creator | PERREAULT, John D CRONIN, Alexander D |
| description | The development of nanotechnology and atom optics relies on understanding how atoms behave and interact with their environment. Isolated atoms can exhibit wavelike (coherent) behavior with a corresponding de Broglie wavelength and phase which can be affected by nearby surfaces. Here an atom interferometer is used to measure the phase shift of Na atom waves induced by the walls of a 50 nm wide cavity. To our knowledge this is the first direct measurement of the de Broglie wave phase shift caused by atom-surface interactions. The magnitude of the phase shift is in agreement with that predicted by Lifshitz theory for a nonretarded van der Waals interaction. This experiment also demonstrates that atom waves can retain their coherence even when atom-surface distances are as small as 10 nm. |
| doi_str_mv | 10.1103/PhysRevLett.95.133201 |
| format | Article |
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Isolated atoms can exhibit wavelike (coherent) behavior with a corresponding de Broglie wavelength and phase which can be affected by nearby surfaces. Here an atom interferometer is used to measure the phase shift of Na atom waves induced by the walls of a 50 nm wide cavity. To our knowledge this is the first direct measurement of the de Broglie wave phase shift caused by atom-surface interactions. The magnitude of the phase shift is in agreement with that predicted by Lifshitz theory for a nonretarded van der Waals interaction. 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Isolated atoms can exhibit wavelike (coherent) behavior with a corresponding de Broglie wavelength and phase which can be affected by nearby surfaces. Here an atom interferometer is used to measure the phase shift of Na atom waves induced by the walls of a 50 nm wide cavity. To our knowledge this is the first direct measurement of the de Broglie wave phase shift caused by atom-surface interactions. The magnitude of the phase shift is in agreement with that predicted by Lifshitz theory for a nonretarded van der Waals interaction. 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Isolated atoms can exhibit wavelike (coherent) behavior with a corresponding de Broglie wavelength and phase which can be affected by nearby surfaces. Here an atom interferometer is used to measure the phase shift of Na atom waves induced by the walls of a 50 nm wide cavity. To our knowledge this is the first direct measurement of the de Broglie wave phase shift caused by atom-surface interactions. The magnitude of the phase shift is in agreement with that predicted by Lifshitz theory for a nonretarded van der Waals interaction. This experiment also demonstrates that atom waves can retain their coherence even when atom-surface distances are as small as 10 nm.</abstract><cop>Ridge, NY</cop><pub>American Physical Society</pub><pmid>16197137</pmid><doi>10.1103/PhysRevLett.95.133201</doi><tpages>1</tpages></addata></record> |
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| ispartof | Physical review letters, 2005-09, Vol.95 (13), p.133201.1-133201.4, Article 133201 |
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| source | American Physical Society Journals |
| subjects | Atom and neutron interferometry Atom and neutron optics Atomic and molecular collision processes and interactions Atomic and molecular physics ATOMS BEAM OPTICS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Classical and quantum physics: mechanics and fields DE BROGLIE WAVELENGTH Exact sciences and technology INTERACTIONS Interactions of atoms, molecules and their ions with surfaces photon and electron emission neutralization of ions INTERFEROMETERS INTERFEROMETRY Matter waves NANOSTRUCTURES PHASE SHIFT Physics Scattering of atoms, molecules and ions SODIUM SURFACES VAN DER WAALS FORCES |
| title | Observation of atom wave phase shifts induced by van der Waals atom-surface interactions |
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