Phase diagram of a QED-cavity array coupled via a N-type level scheme
Autor: | Rosario Fazio, Jiasen Jin, Davide Rossini |
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Přispěvatelé: | Jin, Jiasen, Fazio, Rosario, Rossini, Davide, Jin, J., Fazio, R., Rossini, D. |
Jazyk: | angličtina |
Rok vydání: | 2015 |
Předmět: |
Physics
Coupling Condensed Matter::Quantum Gases Quantum Physics Strongly correlated polariton systems Condensed matter physics Mott insulator Phase (waves) FOS: Physical sciences Physics::Optics Quantum phase transition Quantum phases Renormalization group Condensed Matter Physics Atomic and Molecular Physics and Optics Superfluidity Cavity quantum electrodynamic Control and Systems Engineering Polariton Electrical and Electronic Engineering Quantum Physics (quant-ph) Phase diagram |
Popis: | We study the zero-temperature phase diagram of a one-dimensional array of QED cavities where, besides the single-photon hopping, an additional coupling between neighboring cavities is mediated by an N-type four-level system. By varying the relative strength of the various couplings, the array is shown to exhibit a variety of quantum phases including a polaritonic Mott insulator, a density-wave and a superfluid phase. Our results have been obtained by means of numerical density-matrix renormalization group calculations. The phase diagram was obtained by analyzing the energy gaps for the polaritons, as well as through a study of two-point correlation functions. 12 pages, 6 figures; EPJ Quantum Technology 2015, 2:5 |
Databáze: | OpenAIRE |
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