scholarly journals Fabrication Technologies for Superconducting Quantum Circuits for Large-scale Quantum Computing

2018 ◽  
Vol 53 (5) ◽  
pp. 295-305
Author(s):  
Hirotaka TERAI ◽  
Wei QIU ◽  
Taro YAMASHITA
Keyword(s):  
Quantum Computing ◽  
Large Scale ◽  
Quantum Circuits ◽  
Superconducting Quantum Circuits

scholarly journals Modeling Enclosures for Large-Scale Superconducting Quantum Circuits

2020 ◽  
Vol 14 (2) ◽  
Author(s):  
P.A. Spring ◽  
T. Tsunoda ◽  
B. Vlastakis ◽  
P.J. Leek
Keyword(s):  
Large Scale ◽  
Quantum Circuits ◽  
Superconducting Quantum Circuits

scholarly journals Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 milliseconds

2022 ◽  
Vol 8 (1) ◽  
Author(s):  
Chenlu Wang ◽  
Xuegang Li ◽  
Huikai Xu ◽  
Zhiyuan Li ◽  
Junhua Wang ◽  
...  
Keyword(s):  
Large Scale ◽  
Dry Etching ◽  
Wet Etching ◽  
Etching Process ◽  
Quantum Circuits ◽  
Quantum Computers ◽  
Tantalum Films ◽  
Long Lifetime ◽  
Superconducting Quantum Circuits

AbstractHere we report a breakthrough in the fabrication of a long lifetime transmon qubit. We use tantalum films as the base superconductor. By using a dry etching process, we obtained transmon qubits with a best T1 lifetime of 503 μs. As a comparison, we also fabricated transmon qubits with other popular materials, including niobium and aluminum, under the same design and fabrication processes. After characterizing their coherence properties, we found that qubits prepared with tantalum films have the best performance. Since the dry etching process is stable and highly anisotropic, it is much more suitable for fabricating complex scalable quantum circuits, when compared to wet etching. As a result, the current breakthrough indicates that the dry etching process of tantalum film is a promising approach to fabricate medium- or large-scale superconducting quantum circuits with a much longer lifetime, meeting the requirements for building practical quantum computers.

scholarly journals Andreev Probe of Persistent Current States in Superconducting Quantum Circuits

2005 ◽  
Vol 95 (14) ◽  
Author(s):  
V. T. Petrashov ◽  
K. G. Chua ◽  
K. M. Marshall ◽  
R. Sh. Shaikhaidarov ◽  
J. T. Nicholls
Keyword(s):  
Persistent Current ◽  
Quantum Circuits ◽  
Superconducting Quantum Circuits

scholarly journals Fully in situ Nb/InAs-nanowire Josephson junctions by selective-area growth and shadow evaporation

2021 ◽  
Author(s):  
Pujitha Perla ◽  
H. Aruni Fonseka ◽  
Patrick Zellekens ◽  
Russell Deacon ◽  
Yisong Han ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Josephson Junctions ◽  
Quantum Circuits ◽  
Selective Area Growth ◽  
Selective Area ◽  
Area Growth ◽  
Shadow Evaporation ◽  
Superconducting Quantum Circuits

Nb/InAs-nanowire Josephson junctions are fabricated in situ by a special shadow evaporation scheme for the superconducting Nb electrode. The junctions are interesting candidates for superconducting quantum circuits requiring large magnetic fields.

scholarly journals Free-mode removal and mode decoupling for simulating general superconducting quantum circuits

2021 ◽  
Vol 103 (17) ◽  
Author(s):  
Dawei Ding ◽  
Hsiang-Sheng Ku ◽  
Yaoyun Shi ◽  
Hui-Hai Zhao
Keyword(s):  
Quantum Circuits ◽  
Free Mode ◽  
Superconducting Quantum Circuits

Effective gauge potentials induced by superconducting quantum circuits

2011 ◽  
Vol 375 (4) ◽  
pp. 808-811 ◽  
Author(s):  
Zhi-Bo Feng ◽  
An-Mei Wang ◽  
Run-Ying Yan
Keyword(s):  
Quantum Circuits ◽  
Superconducting Quantum Circuits

scholarly journals Efficient Quantum Circuits for One-Way Quantum Computing

2009 ◽  
Vol 102 (10) ◽  
Author(s):  
Tetsufumi Tanamoto ◽  
Yu-xi Liu ◽  
Xuedong Hu ◽  
Franco Nori
Keyword(s):  
Quantum Computing ◽  
Quantum Circuits

Quantum circuits for simple periodic functions

2014 ◽  
Vol 14 (9&10) ◽  
pp. 763-776
Author(s):  
Omar Gamel ◽  
Daniel F.V. James
Keyword(s):  
Quantum Computing ◽  
Periodic Function ◽  
Quantum Circuits ◽  
Special Importance ◽  
Periodic Functions ◽  
Single Period ◽  
Shor's Algorithm ◽  
Toffoli Gates ◽  
One To One

Periodic functions are of special importance in quantum computing, particularly in applications of Shor's algorithm. We explore methods of creating circuits for periodic functions to better understand their properties. We introduce a method for constructing the circuit for a simple monoperiodic function, that is one-to-one within a single period, of a given period $p$. We conjecture that to create a simple periodic function of period $p$, where $p$ is an $n$-bit number, one needs at most $n$ Toffoli gates.

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