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Quantum phase transitions in photonic cavities with two-level systems

May 22nd, 2008  |  by  |  published in All, Papers, Research, Solid Light

Phys. Rev. A, 77, 5, 053819 (2008)

Systems of coupled photonic cavities have been predicted to exhibit quantum phase transitions by analogy with the Hubbard model. To this end, we have studied topologies of few (up to six) photonic cavities each containing a single two-level system. Quantum phase space diagrams are produced for these systems, and compared to mean-field results. We also consider finite effective temperature, and compare this to the notion of disorder. We find the extent of the Mott lobes shrink analogously to the conventional Bose-Hubbard model.

Quantum phase transitions of light

November 1st, 2007  |  by  |  published in All, Featured, Highlights, Solid Light

Quantum phase transitions of light

As physics and engineering extend their reach to the control of single excitations of nature, we gain the ability to explore and even design the interaction of matter and energy in fundamentally new ways. One of the most interesting opportunities this presents is controllable interactions between many quantum particles — such as electrons — which is traditionally the realm of condensed matter physics. The questions we asked ourselves were these: Can we also do this with light? Can it be useful? We show that the answer is YES!

Tahan Research

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