Reverse quantum state engineering using electronic feedback loops

dc.contributor.authorKießlich, Gerold
dc.contributor.authorEmary, Clive
dc.contributor.authorSchaller, Gernot
dc.contributor.authorBrandes, Tobias
dc.date.accessioned2022-02-15T14:22:51Z
dc.date.available2022-02-15T14:22:51Z
dc.date.issued2012-12-31
dc.date.updated2022-02-10T05:40:16Z
dc.description.abstractWe propose an all-electronic technique to manipulate and control interacting quantum systems by unitary single-jump feedback conditioned on the outcome of a capacitively coupled electrometer and, in particular, a single-electron transistor. We provide a general scheme for stabilizing pure states in the quantum system and use an effective Hamiltonian method for the quantum master equation to elaborate on the nature of stabilizable states and the conditions under which state purification can be achieved. The state engineering within the quantum feedback scheme is shown to be linked with the solution of an inverse eigenvalue problem. Two applications of the feedback scheme are presented in detail: (i) stabilization of delocalized pure states in a single charge qubit and (ii) entanglement stabilization in two coupled charge qubits. In the latter example, we demonstrate the stabilization of a maximally entangled Bell state for certain detector positions and local feedback operations.en
dc.description.sponsorshipDFG, 163436311, SFB 910: Kontrolle selbstorganisierender nichtlinearer Systeme: Theoretische Methoden und Anwendungskonzepteen
dc.identifier.eissn1367-2630
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/16387
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-15163
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/3.0/en
dc.subject.ddc530 Physikde
dc.subject.otherelectronic feedback loopsen
dc.subject.otherquantum state engineeringen
dc.subject.otherinteracting quantum systemsen
dc.subject.otherunitary single-jump feedbacken
dc.subject.othersingle-electron transistoren
dc.titleReverse quantum state engineering using electronic feedback loopsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber123036en
dcterms.bibliographicCitation.doi10.1088/1367-2630/14/12/123036en
dcterms.bibliographicCitation.issue12en
dcterms.bibliographicCitation.journaltitleNew Journal of Physicsen
dcterms.bibliographicCitation.originalpublishernameIOPen
dcterms.bibliographicCitation.originalpublisherplaceBristolen
dcterms.bibliographicCitation.volume14en
tub.accessrights.dnbfreeen
tub.affiliationFak. 2 Mathematik und Naturwissenschaften>Inst. Theoretische Physik>FG Computergestützte Materialphysikde
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Computergestützte Materialphysikde
tub.affiliation.instituteInst. Theoretische Physikde
tub.publisher.universityorinstitutionTechnische Universität Berlinen
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