2012 Fiscal Year Final Research Report
Precision spectroscopy of ultracold molecules for the detection of the temporal variation of the electron-to-proton mass ratio
| Project/Area Number |
23684034
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KOBAYASHI Jun 東京大学, 大学院・工学系研究科, 助教 (50579753)
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| Project Period (FY) |
2011 – 2012
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| Keywords | レーザー冷却 / 精密測定 |
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| Research Abstract |
The electron-to-proton mass ratio is known as a dimensionless physical constant, which is about 1/1836. By the test of the stability of such dimensionless physical constants, we can test the Einstein equivalence principle. With the precision spectroscopy of the ultracold KRb molecules, we have succeeded in specifying the levels which are most suitable for the test of the stability of the electron-to-proton mass ratio, and succeeded in the precision spectroscopy of them. The statistical error of our measurement exceeds the accuracy of the experiments done by other groups so far.
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