Phys. Rev. A 81, 053811 (2010) [18 pages]Strong and weak coupling of two coupled qubitsReceived 13 January 2010; published 7 May 2010 I investigate the dynamics and power spectrum of two coupled qubits (two-level systems) under incoherent continuous pump and dissipation. New regimes of strong coupling are identified, which are due to additional paths of coherence flow in the system. Dressed states are reconstructed even in the regime of strong decoherence. The results are analytical and offer an exact description of strong coupling in the presence of pumping and decay in a nontrivial (nonlinear) system. © 2010 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.81.053811
DOI:
10.1103/PhysRevA.81.053811
PACS:
42.50.Hz, 42.50.Pq, 03.65.Yz, 78.55.-m
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