Heat Transport in Superconducting Quantum Circuits

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Senior, Jorden
dc.date.accessioned 2019-12-12T10:01:33Z
dc.date.available 2019-12-12T10:01:33Z
dc.date.issued 2019
dc.identifier.isbn 978-952-60-8857-0 (electronic)
dc.identifier.isbn 978-952-60-8856-3 (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/123456789/41494
dc.description.abstract Superconducting microwave circuits are a ubiquitous and important tool for devices that exploit the phenomena of superconductivity and cryogenic temperatures as an environment for achieving the generation, manipulation, and detection of quantum states - required for the ongoing development of quantum technologies. In particular, superconducting circuits are a promising platform for the universal quantum computer, which will require an unprecedented density of quantum-coherent elements to perform large-scale quantum-enhanced calculations and simulations, using the framework of cavity quantum electrodynamics.Dissipation and heat in these superconducting circuits is a key source of error and inefficiency, however the thermodynamics in this regime is poorly understood despite its increasing relevancy.This thesis describes the integration of superconducting resonators and artificial atoms derived from superconducting quantum circuits with ultra-sensitive bolometry, for looking at heat transport through superconducting circuits. We will describe the physics and operation of each of these elements, before combining and utilising them to perform heat transport measurements through a superconducting artificial atom coupled to two resonators, each terminated by a normal-metal mesoscopic resistor, with the resistor temperature measured and temperature gradients across the circuit induced by superconducting tunnel-probes. We will present tunable heat transport through this system, firstly when the resonators are symmetric, allowing us to observe the role of dissipation-limited coupling of the resonators to the artificial atom on the locality of the heat transport, then on an asymmetric system, demonstrating a directional rectification of the heat transport. Additionally, we will discuss how each element of the system can be individually characterised, in particular the quality factor of superconducting resonators in the highly-dissipative limit, by exploiting the superconducting transition to perform a background reference. It is suggested that this hybrid quantum system, and these initial experiments provide a promising platform in the emergent field of circuit quantum thermodynamics. We believe that the techniques and tools developed during this thesis present key steps towards the understanding of the thermodynamics of quantum circuits, towards the realisation of devices that can explore heat transport in the quantum limit, such as a quantum heat engine. en
dc.format.extent 65 + app. 65
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 225/2019
dc.relation.haspart [Publication 1]: Richard E. George, Jorden Senior, Olli-Pentti Saira, Jukka P. Pekola, Sebastian E. de Graaf, Tobias Lindström, Yuri A. Pashkin. Multiplexing Superconducting Qubit Circuit for Single Microwave Photon Generation. J Low Temp Phys, 2017, 189, 60–75. Full text in Acris/Aaltodoc: http://urn.fi/URN:NBN:fi:aalto-201708036346. DOI: 10.1007/s10909-017-1787-x
dc.relation.haspart [Publication 2]: Yu-Cheng Chang, Bayan Karimi, Jorden Senior, Alberto Ronzani, Joonas T. Peltonen, Hsi-Sheng Goan, Chii-Dong Chen, Jukka P. Pekola. Utilization of the superconducting transition for characterizing low-quality-factor superconducting resonators. Appl. Phys. Lett., 2019, 115, 022601. Full text in Acris/Aaltodoc: http://urn.fi/URN:NBN:fi:aalto-201907304578. DOI: 10.1063/1.5098310
dc.relation.haspart [Publication 3]: Alberto Ronzani, Bayan Karimi, Jorden Senior, Yu-Cheng Chang, Joonas T. Peltonen, Chii-Dong Chen, Jukka P. Pekola. Tunable photonic heat transport in a quantum heat valve. Nature Physics, 2018, 14, 991-995. Full text in Acris/Aaltodoc: http://urn.fi/URN:NBN:fi:aalto-201808014152.DOI: 10.1038/s41567-018-0199-4
dc.relation.haspart [Publication 4]: Jorden Senior, Azat Gubaydullin, Bayan Karimi, Joonas T. Peltonen, Joachim Ankerhold, Jukka P. Pekola. Heat rectification via a superconducting artificial atom. Submitted to Nature Communications Physics in 2019.
dc.subject.other Physics en
dc.title Heat Transport in Superconducting Quantum Circuits 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 circuit en
dc.subject.keyword microwaves en
dc.subject.keyword qubit en
dc.subject.keyword tunnel junction en
dc.subject.keyword quantum heat valve en
dc.subject.keyword dissipation en
dc.subject.keyword heat bath en
dc.subject.keyword NIS thermometry en
dc.identifier.urn URN:ISBN:978-952-60-8857-0
dc.type.dcmitype text en
dc.type.ontasot Doctoral dissertation (article-based) en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.contributor.supervisor Pekola, Jukka P., Prof., Aalto University, Department of Applied Physics, Finland
dc.opn Koch, Jens, Assoc. Prof., Northwestern University, USA
dc.contributor.lab PICO Group en
dc.rev Leek, Peter, Dr., University of Oxford, UK
dc.rev Roch, Nicolas, Dr., Institut Néel - CNRS, France
dc.date.defence 2019-12-17
local.aalto.acrisexportstatus checked 2020-01-27_1431
local.aalto.infra OtaNano
local.aalto.infra OtaNano – Aalto Nanofab / Micronova
local.aalto.infra OtaNano – Low Temperature Laboratory
local.aalto.formfolder 2019_12_11_klo_12_53
local.aalto.archive yes

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