TY - JOUR
T1 - Motional broadening in ensembles with heavy-tail frequency distribution
AU - Sagi, Yoav
AU - Pugatch, Rami
AU - Almog, Ido
AU - Davidson, Nir
AU - Aizenman, Michael
PY - 2011/4/18
Y1 - 2011/4/18
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79960632879&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.83.043821
DO - 10.1103/PhysRevA.83.043821
M3 - Article
AN - SCOPUS:79960632879
SN - 1050-2947
VL - 83
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 4
M1 - 043821
ER -