Academic Journal
Semifluxons in Superconductivity and Cold Atomic Gases
| العنوان: | Semifluxons in Superconductivity and Cold Atomic Gases |
|---|---|
| المؤلفون: | R. Walser, E. Goldobin, O. Crasser, D. Koelle, R. Kleiner, W. P. Schleich |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://arxiv.org/pdf/0801.1567v1.pdf. |
| سنة النشر: | 2008 |
| المجموعة: | CiteSeerX |
| مصطلحات موضوعية: | Long Josephson junction, sine-Gordon equation, fractional Josephson vortex, quantum tunneling, cold atoms, Bose-Einstein condensatesSemifluxons in Superconductivity and Cold Atomic Gases 2 |
| الوصف: | Josephson junctions and junction arrays are well studied devices in superconductivity. With external magnetic fields one can modulate the phase in a long junction and create traveling, solitonic waves of magnetic flux, called fluxons. Today, it is also possible to device two different types of junctions: depending on the sign of the critical current density jc ≷ 0, they are called 0- or π-junction. In turn, a 0-π junction is formed by joining two of such junctions. As a result, one obtains a pinned Josephson vortex of fractional magnetic flux, at the 0-π boundary. Here, we analyze this arrangement of superconducting junctions in the context of an atomic bosonic quantum gas, where two-state atoms in a double well trap are coupled in an analogous fashion. There, an all-optical 0-π Josephson junction is created by the phase of a complex valued Rabi-frequency and we a derive a discrete four-mode model for this situation, which qualitatively resembles a semifluxon. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.245.7515; http://arxiv.org/pdf/0801.1567v1.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.245.7515 http://arxiv.org/pdf/0801.1567v1.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.BB8E65A7 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |