期刊
OPTICS EXPRESS
卷 18, 期 14, 页码 14586-14597出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.18.014586
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- National Science Council of Taiwan [98-2112-M-007-001-MY3]
We extend the idea of quantum phase transitions of light in the photonic Bose-Hubbard model with interactions to two atomic species by a self-consistent mean field theory. The excitation of two-level atoms interacting with a coherent photon field is analyzed with a finite temperature dependence of the order parameters. Four ground states of the system are found, including an isolated Mott-insulator phase and three different superfluid phases. Like two weakly coupled superconductors, our proposed dual-species lattice system shows a photonic analogue of Josephson effect. i.e., the crossovers between two superfluid states. The dynamics of the proposed two species model provides a promising quantum simulator for possible quantum information processes. (C) 2010 Optical Society of America
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