285 research outputs found
A note on interval games and their saddle points (Mathematical Optimization Theory and its Algorithm)
Markov decision processes with fuzzy rewards (Perspective and problem for Dynamic Programming with uncertainty)
Lifetime measurement of the ^3P_2 metastable state of strontium atoms
We have measured the lifetime of the 5s5p ^3P_2 metastable state of strontium
atoms by magneto-optically trapping the decayed atoms to the ground state,
which allowed sensitive detection of the rare decay events. We found that the
blackbody radiation-induced decay was the dominant decay channel for the state
at T = 300 K. The lifetime was determined to be 500^{+280}_{-130} s in the
limit of zero temperature.Comment: 4 pages, 3 figures, submitted to Physical Review Letter
Observation of the clock transition at 431 nm in Yb
We report on the observation of the transition at 431 nm in Yb by depleting atoms in
a magneto-optical trap formed by the intercombination
transition. The absolute frequency of the transition to the state is
determined to be ~kHz against physical realization of
Coordinated Universal Time maintained by the National Metrology Institute of
Japan with a frequency comb. The factor of the transition to the
state and the A hyperfine constant are measured to be and
1123.273(13)~MHz, respectively. More precise spectroscopy of this transition
can lead to searches for time variation of the fine structure constant and
searches for new physics with isotope shift measurements.Comment: 5 pages, 4 figure
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