Journal
PHYSICAL REVIEW LETTERS
Volume 100, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.100.160504
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We study the correlated spontaneous emission from a dense spherical cloud of N atoms uniformly excited by absorption of a single photon. We find that the decay of such a state depends on the relation between an effective Rabi frequency Omega proportional to root N and the time of photon flight through the cloud R/c. If Omega R/c < 1 the state exponentially decays with rate Omega(2)R/c and the state lifetime is greater than R/c. In the opposite limit Omega R/c >> 1, the coupled atom-radiation system oscillates between the collective Dicke state (with no photons) and the atomic ground state (with one photon) with frequency Omega while decaying at a rate c/R.
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