Scalable scheme for entangling multiple ququarts using linear optical elements

So Young Baek, Yoon Ho Kim

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We report a scalable linear optical scheme for generating entangled states of multiple ququarts in which the individual single-ququart state is prepared with the biphoton polarization state of frequency-nondegenerate spontaneous parametric down-conversion. The output state is calculated with the full consideration of the higher order effect (double-pair events) of spontaneous parametric down-conversion. Scalability to multiple-ququart entanglement is demonstrated with examples: linear optical entanglement of three and four individual biphoton ququarts.

Original languageEnglish
Pages (from-to)28-34
Number of pages7
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number1
Publication statusPublished - 2007 Oct 8


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