Engineering mixed states in a degenerate four-state system

A. Karpati, Z. Kis, P. Adam

Research output: Contribution to journalArticle

19 Citations (Scopus)


A method for preparing any pure and wide class of mixed quantum states in the decoherence-free ground-state subspace of a degenerate multilevel lambda system, was proposed. The method is a combination of optical pumping and a series of coherent excitation processes. The method is robust with respect to the fluctuation of the pulse areas, as in adiabatic methods. The method is based on an excitation-relaxation process that derived the state of the system into the dark subspace of the Hamiltonian that governed the dynamics without decay processes.

Original languageEnglish
Pages (from-to)193003-1-193003-4
JournalPhysical review letters
Issue number19
Publication statusPublished - Nov 5 2004

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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