Experimental verification of decoherence-free subspaces

P. G. Kwiat, A. J. Berglund, J. B. Altepeter, A. G. White

Research output: Contribution to journalArticlepeer-review

Abstract

Using spontaneous parametric down-conversion, we produce polarization-entangled states of two photons and characterize them using two-photon tomography to measure the density matrix. A controllable decoherence is imposed on the states by passing the photons through thick, adjustable birefringent element. When the system is subject to collective decoherence, one particular entangled state is seen to be decoherence-free, as predicted by theory. Such decoherence-free systems may have an important role for the future of quantum computation and information processing.

Original languageEnglish (US)
Pages (from-to)498-501
Number of pages4
JournalScience
Volume290
Issue number5491
DOIs
StatePublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • General

Fingerprint

Dive into the research topics of 'Experimental verification of decoherence-free subspaces'. Together they form a unique fingerprint.

Cite this