Show simple item record

dc.contributor.authorSzigeti, Stuart S.
dc.contributor.authorCarvalho, Andre R. R.
dc.contributor.authorMorley, James G.
dc.contributor.authorHush, Michael R.
dc.date.accessioned2017-07-31T23:57:23Z
dc.date.available2017-07-31T23:57:23Z
dc.date.issued2014
dc.identifier.issn1079-7114
dc.identifier.doi10.1103/PhysRevLett.113.020407
dc.identifier.urihttp://hdl.handle.net/10072/342729
dc.description.abstractA “no-knowledge” measurement of an open quantum system yields no information about any system observable; it only returns noise input from the environment. Surprisingly, performing such a no-knowledge measurement can be advantageous. We prove that a system undergoing no-knowledge monitoring has reversible noise, which can be canceled by directly feeding back the measurement signal. We show how no-knowledge feedback control can be used to cancel decoherence in an arbitrary quantum system coupled to a Markovian reservoir that is being monitored. Since no-knowledge feedback does not depend on the system state or Hamiltonian, such decoherence cancellation is guaranteed to be general and robust, and can operate in conjunction with any other quantum control protocol. As an application, we show that no-knowledge feedback could be used to improve the performance of dissipative quantum computers subjected to local loss.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofpagefrom020407-1
dc.relation.ispartofpageto020407-6
dc.relation.ispartofissue2
dc.relation.ispartofjournalPhysical Review Letters
dc.relation.ispartofvolume113
dc.subject.fieldofresearchQuantum Physics not elsewhere classified
dc.subject.fieldofresearchMathematical Sciences
dc.subject.fieldofresearchPhysical Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode020699
dc.subject.fieldofresearchcode01
dc.subject.fieldofresearchcode02
dc.subject.fieldofresearchcode09
dc.titleIgnorance is bliss: General and robust cancellation of decoherence via no-knowledge quantum feedback
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2014 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
gro.hasfulltextFull Text
gro.griffith.authorRibeiro de Carvalho, Andre R.


Files in this item

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record