Preparation and characterization of arbitrary states of four-dimensional qudits based on biphotons

So Young Baek, Stanislav S. Straupe, Alexander P. Shurupov, Sergei P. Kulik, Yoon Ho Kim

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

We report interferometric schemes to prepare arbitrary states of four-dimensional qudits (ququarts) based on biphoton states of ultrafast-pumped frequency-nondegenerate spontaneous parametric down conversion. Preparation and tomographic characterization of a few examples of general single-ququart states, a pure state, a mixed state (fully diagonal), and a mixed state (partially coherent), are experimentally demonstrated.

Original languageEnglish
Article number042321
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume78
Issue number4
DOIs
Publication statusPublished - 2008 Oct 22
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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