國立虎尾科技大學 |

Millimeter-Wave Superconducting Quantum Devices.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Millimeter-Wave Superconducting Quantum Devices./
作者:	Anferov, Alexander Vladimir.
面頁冊數:	1 online resource (325 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-09, Section: B.
Contained By:	Dissertations Abstracts International85-09B.
標題:	Computational physics. -
電子資源:	click for full text (PQDT)
ISBN:	9798381945317

Millimeter-Wave Superconducting Quantum Devices.
Anferov, Alexander Vladimir.

Millimeter-Wave Superconducting Quantum Devices. - 1 online resource (325 pages)

Source: Dissertations Abstracts International, Volume: 85-09, Section: B.

Thesis (Ph.D.)--The University of Chicago, 2024.

Includes bibliographical references

To continue achieving ever faster computation speeds, future computer processors may need to increase their operating frequency to achieve clock speeds beyond several GHz. Quantum computing offers an alternate approach by leveraging quantum mechanical superposition to make each clock operation more efficient, allowing the processor to solve certain problems much more efficiently. Current quantum processors operate slower than their classical counterparts, with the fastest quantum operations at microwave frequencies and utilizing superconducting artificial atoms (qubits)-a promising platform for quantum experiments studying light-matter interactions in the strong coupling regime. Increasing qubit frequency to the millimeter-wave range (∼100 GHz) offers a straightforward way to increase quantum computing speed for any qubit design. Crucially, millimeter-wave frequencies also have greatly reduced sensitivity to thermal noise, and whereas microwave qubits require extremely low temperatures (<50 mK) and isotopic enrichment of 3He and 4He in order to reduce sources of decoherence, millimeter-wave qubits can operate at significantly higher temperatures near 1 K. These temperatures are achievable using simpler methods such as direct 4He evaporation, which translates to orders of magnitude higher cooling power. This is transformative for scaling up superconducting quantum processors by significantly increasing the number of qubit control channels possible in a single cryostat, enabling direct integration of qubits with superconducting digital processors, and allowing for more energy efficient possibilities for quantum communication between cryostats. In this thesis, we introduce millimeter-wave superconducting devices as a platform for quantum experiments. We develop a robust niobium trilayer Josephson junction with improved quantum coherence properties capable of operating at higher frequencies and temperatures than conventional aluminum junctions. Based on this technology we explore the thermal resilience of qubits with higher and higher frequency, finally demonstrating a 72 GHz millimeter-wave qubit cooled entirely with 4He.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798381945317Subjects--Topical Terms:

1181955
Computational physics.
Subjects--Index Terms:

Kinetic inductanceIndex Terms--Genre/Form:

554714
Electronic books.

Millimeter-Wave Superconducting Quantum Devices.
LDR:03561ntm a22004217 4500 001 1147853
005 20240916075415.5
006 m o d
007 cr bn ---uuuuu
008 250605s2024 xx obm 000 0 eng d
020 $a 9798381945317
035 $a (MiAaPQ)AAI30988754
035 $a AAI30988754
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Anferov, Alexander Vladimir. $3 1473682
245 1 0 $a Millimeter-Wave Superconducting Quantum Devices.
264 0 $c 2024
300 $a 1 online resource (325 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 85-09, Section: B.
500 $a Advisor: Schuster, David I.
502 $a Thesis (Ph.D.)--The University of Chicago, 2024.
504 $a Includes bibliographical references
520 $a To continue achieving ever faster computation speeds, future computer processors may need to increase their operating frequency to achieve clock speeds beyond several GHz. Quantum computing offers an alternate approach by leveraging quantum mechanical superposition to make each clock operation more efficient, allowing the processor to solve certain problems much more efficiently. Current quantum processors operate slower than their classical counterparts, with the fastest quantum operations at microwave frequencies and utilizing superconducting artificial atoms (qubits)-a promising platform for quantum experiments studying light-matter interactions in the strong coupling regime. Increasing qubit frequency to the millimeter-wave range (∼100 GHz) offers a straightforward way to increase quantum computing speed for any qubit design. Crucially, millimeter-wave frequencies also have greatly reduced sensitivity to thermal noise, and whereas microwave qubits require extremely low temperatures (<50 mK) and isotopic enrichment of 3He and 4He in order to reduce sources of decoherence, millimeter-wave qubits can operate at significantly higher temperatures near 1 K. These temperatures are achievable using simpler methods such as direct 4He evaporation, which translates to orders of magnitude higher cooling power. This is transformative for scaling up superconducting quantum processors by significantly increasing the number of qubit control channels possible in a single cryostat, enabling direct integration of qubits with superconducting digital processors, and allowing for more energy efficient possibilities for quantum communication between cryostats. In this thesis, we introduce millimeter-wave superconducting devices as a platform for quantum experiments. We develop a robust niobium trilayer Josephson junction with improved quantum coherence properties capable of operating at higher frequencies and temperatures than conventional aluminum junctions. Based on this technology we explore the thermal resilience of qubits with higher and higher frequency, finally demonstrating a 72 GHz millimeter-wave qubit cooled entirely with 4He.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Computational physics. $3 1181955
650 4 $a Condensed matter physics. $3 1148471
650 4 $a Electrical engineering. $3 596380
650 4 $a Quantum physics. $3 1179090
653 $a Kinetic inductance
653 $a Millimeter-wave
653 $a Quantum operations
653 $a Qubit
653 $a Superconducting
653 $a Quantum communication
655 7 $a Electronic books. $2 local $3 554714
690 $a 0599
690 $a 0544
690 $a 0611
690 $a 0216
710 2 $a The University of Chicago. $b Physics. $3 1180584
710 2 $a ProQuest Information and Learning Co. $3 1178819
773 0 $t Dissertations Abstracts International $g 85-09B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30988754 $z click for full text (PQDT)