TY - JOUR

T1 - Super-and subradiant emission of two-level systems in the near-Dicke limit

AU - Brooke, Peter G.

AU - Marzlin, Karl Peter

AU - Cresser, James D.

AU - Sanders, Barry C.

N1 - Brooke PG, Marzlin KP, Cresser JD and Sanders BC, Phys. Rev. A, 77(3), 033844, 2008. Copyright (2008) by the American Physical Society. The original article can be found at http://dx.doi.org/10.1103/PhysRevA.77.033844

PY - 2008/3/25

Y1 - 2008/3/25

N2 - We analyze the stability of super- and subradiant states in a system of identical two-level atoms in the near-Dicke limit, i.e., when the atoms are very close to each other compared to the wavelength of resonant light. The dynamics of the system are studied using a renormalized master equation, both with multipolar and minimal-coupling interaction schemes. We show that both models lead to the same result and, in contrast to nonrenormalized models, predict that the relative orientation of the (coaligned) dipoles is unimportant in the Dicke limit. Our master equation is of relevance to any system of dipole-coupled two-level atoms, and gives bounds on the strength of the dipole-dipole interaction for closely spaced atoms. Exact calculations for small atom systems in the near-Dicke limit show the increased emission times resulting from the evolution generated by the strong dipole-dipole interaction. However, for large numbers of atoms in the near-Dicke limit, it is shown that as the number of atoms increases, the effect of the dipole-dipole interaction on collective emission is reduced.

AB - We analyze the stability of super- and subradiant states in a system of identical two-level atoms in the near-Dicke limit, i.e., when the atoms are very close to each other compared to the wavelength of resonant light. The dynamics of the system are studied using a renormalized master equation, both with multipolar and minimal-coupling interaction schemes. We show that both models lead to the same result and, in contrast to nonrenormalized models, predict that the relative orientation of the (coaligned) dipoles is unimportant in the Dicke limit. Our master equation is of relevance to any system of dipole-coupled two-level atoms, and gives bounds on the strength of the dipole-dipole interaction for closely spaced atoms. Exact calculations for small atom systems in the near-Dicke limit show the increased emission times resulting from the evolution generated by the strong dipole-dipole interaction. However, for large numbers of atoms in the near-Dicke limit, it is shown that as the number of atoms increases, the effect of the dipole-dipole interaction on collective emission is reduced.

UR - http://www.scopus.com/inward/record.url?scp=41549110208&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.77.033844

DO - 10.1103/PhysRevA.77.033844

M3 - Article

AN - SCOPUS:41549110208

VL - 77

SP - 1

EP - 13

JO - Physical Review A: covering atomic, molecular, and optical physics and quantum information

JF - Physical Review A: covering atomic, molecular, and optical physics and quantum information

SN - 2469-9926

IS - 3

M1 - 033844

ER -