FLUX QUBITS, TUNABLE COUPLING AND BEYOND

2009 ◽  
Author(s):  
ANTTI O. NISKANEN
Keyword(s):  
Flux Qubits ◽  
Tunable Coupling

scholarly journals Parametrically-induced tunable coupling between flux qubits — dependence on the coupler bias

2009 ◽  
Vol 150 (2) ◽  
pp. 022023
Author(s):  
Khalil Harrabi ◽  
Fumiki Yoshihara ◽  
Antti O Niskanen ◽  
Yasunobu Nakamura ◽  
Jaw-Shen Tsai
Keyword(s):  
Flux Qubits ◽  
Tunable Coupling

scholarly journals Mediated tunable coupling of flux qubits

2005 ◽  
Vol 7 ◽  
pp. 230-230 ◽  
Author(s):  
Alec Maassen van den Brink ◽  
A J Berkley ◽  
M Yalowsky
Keyword(s):  
Flux Qubits ◽  
Tunable Coupling

scholarly journals Tunable coupling scheme for flux qubits at the optimal point

2006 ◽  
Vol 73 (9) ◽  
Author(s):  
Antti O. Niskanen ◽  
Yasunobu Nakamura ◽  
Jaw-Shen Tsai
Keyword(s):  
Coupling Scheme ◽  
Optimal Point ◽  
Flux Qubits ◽  
Tunable Coupling

scholarly journals Superradiance with an ensemble of superconducting flux qubits

2016 ◽  
Vol 94 (22) ◽  
Author(s):  
Neill Lambert ◽  
Yuichiro Matsuzaki ◽  
Kosuke Kakuyanagi ◽  
Natsuko Ishida ◽  
Shiro Saito ◽  
...  
Keyword(s):  
Flux Qubits ◽  
Superconducting Flux Qubits

Fluxon-controlled quantum computer

2016 ◽  
Vol 14 (07) ◽  
pp. 1650040
Author(s):  
Toshiyuki Fujii ◽  
Shigemasa Matsuo ◽  
Noriyuki Hatakenaka
Keyword(s):  
Error Correction ◽  
Quantum Computer ◽  
Quantum Error Correction ◽  
Capacitively Coupled ◽  
Swap Gate ◽  
Flux Qubits ◽  
Superconducting Flux Qubits ◽  
Quantum Error ◽  
At Home

We propose a fluxon-controlled quantum computer incorporated with three-qubit quantum error correction using special gate operations, i.e. joint-phase and SWAP gate operations, inherent in capacitively coupled superconducting flux qubits. The proposed quantum computer acts exactly like a knitting machine at home.

Synchronous identification and successive detection of multiple traces with tunable coupling oscillators

2022 ◽  
Vol 166 ◽  
pp. 108395
Author(s):  
Cao Xia ◽  
Dong F. Wang ◽  
Jie Song ◽  
Takahito Ono ◽  
Toshihiro Itoh ◽  
...  
Keyword(s):  
Tunable Coupling

Realizing various approximate quantum cloning with XY-type exchange interactions of flux qubits

2014 ◽  
Vol 28 (14) ◽  
pp. 1450081 ◽  
Author(s):  
Na Li ◽  
Liu Ye
Keyword(s):  
Quantum Interference ◽  
Exchange Interactions ◽  
Quantum Cloning ◽  
Superconducting Quantum Interference Devices ◽  
Superconducting Quantum Interference ◽  
Flux Qubits ◽  
Universal Quantum ◽  
Experimental Technology ◽  
Real State

In this paper, we realize all kinds of 1 → 2 approximate quantum cloning, including optimal 1 → 2 symmetric (or asymmetric) universal quantum cloning (UQC) and phase-covariant cloning (PCC), symmetric economical phase-covariant cloning (EPCC) and real state quantum cloning, with the XY-type exchange interactions of the flux qubits which are coupled by dc superconducting quantum interference devices (SQUIDs). It is shown that our schemes can be realized with the current experimental technology.

scholarly journals Galvanic Phase Coupling of Superconducting Flux Qubits

2021 ◽  
Vol 11 (23) ◽  
pp. 11309
Author(s):  
Mun Dae Kim
Keyword(s):  
Coupling Strength ◽  
Fault Tolerant ◽  
Coupled System ◽  
Inductive Coupling ◽  
Galvanic Coupling ◽  
Flux Qubits ◽  
Superconducting Flux Qubits ◽  
Qubit Gate ◽  
Central Loop ◽  
Fundamental Boundary

We investigate the galvanic coupling schemes of superconducting flux qubits. From the fundamental boundary conditions, we obtain the effective potential of the coupled system of two or three flux qubits to provide the exact Lagrangian of the system. While usually the two-qubit gate has been investigated approximately, in this study we derive the exact inductive coupling strength between two flux qubits coupled directly and coupled through a connecting central loop. We observe that the inductive coupling strength needs to be included exactly to satisfy the criteria of fault-tolerant quantum computing.

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