Abstract
We study, theoretically and experimentally, an ensemble of two-level systems coupled to an environment which induces random jumps in their resonant frequency. We present a closed-form formula for the spectrum in terms of the resonant frequency distribution and the Poisson rate constant. For a normal distribution the spectrum deviates from a generalized Gumbel function, a well-known result for continuous stochastic Gaussian processes. We perform experiments with optically trapped cold Rb87 atoms and show that the predictions of our theory for a 3D harmonic trap match the measured spectra without fitting parameters.
Original language | English |
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Article number | 253003 |
Journal | Physical Review Letters |
Volume | 104 |
Issue number | 25 |
DOIs | |
State | Published - 25 Jun 2010 |
Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy