Artificial magnetic field induced by an evanescent wave
| Autor: | Malgorzata Mochol, Krzysztof Sacha |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Multidisciplinary Scalar (physics) Quantum simulator FOS: Physical sciences Article Charged particle Vortex Magnetic field Amplitude Quantum Gases (cond-mat.quant-gas) Prism Physics::Atomic Physics Atomic physics Condensed Matter - Quantum Gases Adiabatic process |
| Zdroj: | Scientific Reports |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/srep07672 |
| Popis: | Cold atomic gases are perfect laboratories for realization of quantum simulators. In order to simulate solid state systems in the presence of magnetic fields special effort has to be made because atoms are charge neutral. There are different methods for realization of artificial magnetic fields, that is the creation of specific conditions so that the motion of neutral particles mimics the dynamics of charged particles in an effective magnetic field. Here, we consider adiabatic motion of atoms in the presence of an evanescent wave. Theoretical description of the adiabatic motion involves artificial vector and scalar potentials related to the Berry phases. Due to the large gradient of the evanescent field amplitude, the potentials can be strong enough to induce measurable effects in cold atomic gases. We show that the resulting artificial magnetic field is able to induce vortices in a Bose-Einstein condensate trapped close to a surface of a prism where the evanescent wave is created. We also analyze motion of an atomic cloud released from a magneto-optical trap that falls down on the surface of the prism. The artificial magnetic field is able to reflect falling atoms that can be observed experimentally. Comment: 19 pages, 7 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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