期刊
PHYSICAL REVIEW A
卷 83, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.83.043821
关键词
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资金
- MIDAS
- MINERVA
- ISF
- DIP
- NSF [DMS-0602360]
- BSF [710021]
We show that the spectrum of an ensemble of two-level systems can be broadened through resetting discrete fluctuations, in contrast to the well-known motional-narrowing effect. The broadening occurs if the ensemble frequency distribution has heavy tails with a diverging first moment. The asymptotic motional broadened line shape is then a Lorentzian. In case there is a physical upper cutoff in the frequency distribution, the broadening effect may still be observed, though only up to a certain fluctuation rate.
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