Phys. Rev. Lett. 91, 187903 (2003) [4 pages]Experimental Application of Decoherence-Free Subspaces in an Optical Quantum-Computing AlgorithmReceived 20 December 2002; revised 21 July 2003; published 31 October 2003 For a practical quantum computer to operate, it is essential to properly manage decoherence. One important technique for doing this is the use of “decoherence-free subspaces” (DFSs), which have recently been demonstrated. Here we present the first use of DFSs to improve the performance of a quantum algorithm. An optical implementation of the Deutsch-Jozsa algorithm can be made insensitive to a particular class of phase noise by encoding information in the appropriate subspaces; we observe a reduction of the error rate from 35% to 7%, essentially its value in the absence of noise. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.187903
DOI:
10.1103/PhysRevLett.91.187903
PACS:
03.67.Pp, 03.65.Yz, 42.25.Hz
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.