Experiments with a transmon artificial atom - state manipulation and detection of magnetic fields

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Paraoanu, Sorin, Dr., Aalto University, Department of Applied Physics, Finland
dc.contributor.author Danilin, Sergey
dc.date.accessioned 2018-04-27T09:02:50Z
dc.date.available 2018-04-27T09:02:50Z
dc.date.issued 2018
dc.identifier.isbn 978-952-60-7956-1 (electronic)
dc.identifier.isbn 978-952-60-7955-4 (printed)
dc.identifier.issn 1799-4942 (electronic)
dc.identifier.issn 1799-4934 (printed)
dc.identifier.issn 1799-4934 (ISSN-L)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/30644
dc.description.abstract The field of quantum computation and simulation has its origins in the early 1980s, when the limitations of the existing paradigm of classical computing machines became apparent. The continuous miniaturization of circuit elements and the increase in their number per unit area will ultimately lead to practical difficulties and to the manifestation of quantum phenomena. This foresight triggered the research work for the invention of new principles of computation. The physical laws of our world are fundamentally quantum mechanical; that is why quantum systems have started to be considered as platforms for possible more powerful computing systems and simulators. Superconducting quantum circuits offer one of the most convenient and promising architectures in this field of research. They are macroscopic and, as a result, provide a better controllability. At the same time they can be produced with customary electronics fabrication methods and they are easily integrable with nowadays electronics.  This dissertation contains experimental studies of fully coplanar superconducting quantum circuits comprising a transmon type artificial atom coupled to a quarter-wavelength waveguide resonator. This circuit represents the simplest simulator of light-matter interaction and acts as a testbed for the gate operations needed to control the quantum state in the field of quantum computation. The stimulated Raman adiabatic passage and the shortcut to its adiabaticity were experimentally studied as methods for the efficient population transfer between the ground and the second excited state of the transmon. The possibility of using a hybrid adiabatic-nonadiabatic pulse sequences for preparing an arbitrary quantum three-level state was shown theoretically. The operation of gates based on geometric phases was implemented on the same type of superconducting structure. Finally, the structure was used as a magnetic flux sensor. The magnetic flux resolution of this sensor is enhanced by the use of two properly modified phase estimation algorithms and it is potentially limited only by the Heisenberg uncertainty principle. The superiority of the realized sensor over the standard classical measurement done on the same sample is clearly demonstrated. This experiment indicates the utility of superconducting quantum circuits for the tasks of quantum metrology. en
dc.format.extent 87 + app. 66
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Aalto University en
dc.publisher Aalto-yliopisto fi
dc.relation.ispartofseries Aalto University publication series DOCTORAL DISSERTATIONS en
dc.relation.ispartofseries 76/2018
dc.relation.haspart [Publication 1]: K.S. Kumar, A. Vepsäläinen, S. Danilin, G.S. Paraoanu. Stimulated Raman adiabatic passage in a three-level superconducting circuit. Nature Communications, 7, 10628, February 2016.DOI: 10.1038/ncomms10628
dc.relation.haspart [Publication 2]: A. Vepsäläinen, S. Danilin, E. Paladino, G. Falci, G.S. Paraoanu. Quantum control in qutrit systems using hybrid Rabi-STIRAP pulses. Photonics, 3, 62, November 2016. Full text in Aaltodoc/Acris: http://urn.fi/URN:NBN:fi:aalto-201612216016. DOI: 10.3390/photonics3040062
dc.relation.haspart [Publication 3]: I. Pietikäinen, S. Danilin, K.S. Kumar, A. Vepsäläinen, D.S. Golubev, J. Tuorila, G.S. Paraoanu. Observation of the Bloch-Siegert shift in a driven quantum-to-classical transition. Phys. Rev. B, 96, 020501(R), July 2017. DOI: 10.1103/PhysRevB.96.020501
dc.relation.haspart [Publication 4]: A. Vepsäläinen, S. Danilin, G.S. Paraoanu. Superadiabatic population transfer by loop driving in a superconducting circuit. Submitted to Phys. Rev. Lett., September 2017
dc.relation.haspart [Publication 5]: S. Danilin, A.V. Lebedev, A. Vepsäläinen, G.B. Lesovik, G. Blatter, G.S. Paraoanu. Quantum-enhanced magnetometry by phase estimation algorithms with a single artificial atom. Accepted for publication in npj Quantum Information, April 2018
dc.relation.haspart [Publication 6]: S. Danilin, A. Vepsäläinen, G.S. Paraoanu. Experimental state control by fast non-Abelian holonomic gates with a superconducting qutrit. Phys. Scr., 93, 055101, March 2018. DOI: 10.1088/1402-4896/aab084
dc.subject.other Physics en
dc.title Experiments with a transmon artificial atom - state manipulation and detection of magnetic fields en
dc.type G5 Artikkeliväitöskirja fi
dc.contributor.school Perustieteiden korkeakoulu fi
dc.contributor.school School of Science en
dc.contributor.department Teknillisen fysiikan laitos fi
dc.contributor.department Department of Applied Physics en
dc.subject.keyword superconducting quantum circuits en
dc.subject.keyword qubits en
dc.subject.keyword adiabatic/non-adiabatic quantum state manipulation en
dc.subject.keyword magnetic field detection en
dc.identifier.urn URN:ISBN:978-952-60-7956-1
dc.type.dcmitype text en
dc.type.ontasot Doctoral dissertation (article-based) en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.contributor.supervisor Pekola, Jukka, Acad. Prof., Aalto University, Department of Applied Physics, Finland
dc.opn Steele, Gary, Prof., Delft University of Technology, Netherlands
dc.rev Weides, Martin P., Prof., University of Glasgow, UK
dc.rev Kirchmair, Gerhard, Prof., University of Insbruck, Austria
dc.date.defence 2018-05-18
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