2012 Fiscal Year Final Research Report
Towards complex-shaped vortex engineering and its real-time imaging
| Project/Area Number |
23740307
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | The University of Electro-Communications |
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Principal Investigator |
KISHIMOTO Tetsuo 電気通信大学, 大学院・情報理工学研究科, 准教授 (70420239)
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| Project Period (FY) |
2011 – 2012
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| Keywords | ボース・アインシュタイン凝縮 / 極低温量子ダイナミクス |
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| Research Abstract |
We proposed methods to generate and manipulate quantum vortices using optical dipole potentials produced by red- or blue-detuned lasers. To experimentally realize such methods, we think that local engineering of an asymmetric AC-Stark shift between the excited state and the ground state of an atomic Bose-Einstein condensate will be important. Differential AC-Stark shifts for such states were measured by monitoring the shift in a saturated absorption spectroscopy signal and the optimal wavelength for the optical dipole potential was determined from them. Further, to obtain high enough resolution that enables local light-shift engineering, we developed an optical system that provides both a large numerical aperture and a long working distance that fits outside our vacuum system.
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