Generating entangled states of two ququarts using linear optical elements

So Young Baek, Yoon Ho Kim

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


We propose linear optical schemes for generating entangled states of two ququarts (four-dimensional quantum systems) in which the single-ququart state is constructed with frequency-nondegenerate biphoton polarization states of spontaneous parametric down-conversion. We show explicitly that it is possible to generate various two-ququart entangled states by interfering two ququarts at a linear optical beam splitter (an ordinary 50-50 beam splitter, a polarizing beam splitter, or a dichroic beam splitter).

Original languageEnglish
Article number034309
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
Publication statusPublished - 2007 Mar 29
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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