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Superconducting Quantum Circuits Based on Disordered Aluminum Films.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Superconducting Quantum Circuits Based on Disordered Aluminum Films./
作者:	Kamenov, Plamen.
面頁冊數:	1 online resource (153 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-08, Section: B.
Contained By:	Dissertations Abstracts International84-08B.
標題:	Quantum physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29994421click for full text (PQDT)
ISBN:	9798371974730

Superconducting Quantum Circuits Based on Disordered Aluminum Films.
Kamenov, Plamen.

Superconducting Quantum Circuits Based on Disordered Aluminum Films. - 1 online resource (153 pages)

Source: Dissertations Abstracts International, Volume: 84-08, Section: B.

Thesis (Ph.D.)--Rutgers The State University of New Jersey, School of Graduate Studies, 2023.

Includes bibliographical references

Aluminum is a material widely used for superconducting devices due to its self-limiting oxide and low loss at microwave frequencies. Granular Aluminum is a type of disordered Aluminum which can be used for high kinetic inductance elements in quantum circuits protected from the flux-noise-induced decay and dephasing, such as the bifluxon qubit. In the first part of this thesis, the focus is on characterization of circuits made of granular Aluminum. Granular Aluminum superinductors are implemented into circuits with low loss and high environmental impedance. In the second part, the suppression of tunneling of nonequilibrium quasiparticles ("quasiparticle poisoning") in Josephson-junction-based qubits is discussed. Quasiparticle poisoning is a source of decoherence which limits the effectiveness of error correction codes. By taking advantage of the dependence of the superconducting gap in Aluminum films on film thickness and disorder, potential barriers that reduce nonequilibrium quasiparticles (NQP) near the junctions are implemented. Suppression of quasiparticle poisoning results in improvement of coherence of the transmon qubits, the leading platform for implementation of the surface error correction codes.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798371974730Subjects--Topical Terms:

726746
Quantum physics.
Subjects--Index Terms:

Disordered superconductorIndex Terms--Genre/Form:

542853
Electronic books.

Superconducting Quantum Circuits Based on Disordered Aluminum Films.
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500 $a Source: Dissertations Abstracts International, Volume: 84-08, Section: B.
500 $a Advisor: Gershenson, Michael.
502 $a Thesis (Ph.D.)--Rutgers The State University of New Jersey, School of Graduate Studies, 2023.
504 $a Includes bibliographical references
520 $a Aluminum is a material widely used for superconducting devices due to its self-limiting oxide and low loss at microwave frequencies. Granular Aluminum is a type of disordered Aluminum which can be used for high kinetic inductance elements in quantum circuits protected from the flux-noise-induced decay and dephasing, such as the bifluxon qubit. In the first part of this thesis, the focus is on characterization of circuits made of granular Aluminum. Granular Aluminum superinductors are implemented into circuits with low loss and high environmental impedance. In the second part, the suppression of tunneling of nonequilibrium quasiparticles ("quasiparticle poisoning") in Josephson-junction-based qubits is discussed. Quasiparticle poisoning is a source of decoherence which limits the effectiveness of error correction codes. By taking advantage of the dependence of the superconducting gap in Aluminum films on film thickness and disorder, potential barriers that reduce nonequilibrium quasiparticles (NQP) near the junctions are implemented. Suppression of quasiparticle poisoning results in improvement of coherence of the transmon qubits, the leading platform for implementation of the surface error correction codes.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Quantum physics. $3 726746
653 $a Disordered superconductor
653 $a Granular aluminum
653 $a Kinetic inductance
653 $a Quasiparticle poisoning
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710 2 $a Rutgers The State University of New Jersey, School of Graduate Studies. $b Physics and Astronomy. $3 3544838
773 0 $t Dissertations Abstracts International $g 84-08B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29994421 $z click for full text (PQDT)