Entangling two distant nanocavities via a waveguide

Hua Tang Tan, Wei Min Zhang, Gao Xiang Li

Research output: Contribution to journalArticle

26 Citations (Scopus)


In this paper, we present a scheme for generating continuous-variable entanglement between two spatially separated nanocavities in photonic crystals, which are mediated by a coupled-resonator optical waveguide. The entanglement degree and purity of the generated states are investigated as varying the cavity frequencies, the cavity-waveguide coupling strength, and the location of the second cavity. It is shown that a steady and pure entanglement between separated nanocavities can be generated only with a weak cavity-waveguide coupling when the cavities are resonant with the band center of the waveguide. Various cases with different cavity frequencies and coupling strengths, which affect the degree of entanglement, are also investigated, and interestingly sudden death and sudden birth of entanglement occur for strong couplings.

Original languageEnglish
Article number062310
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number6
Publication statusPublished - 2011 Jun 8

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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