scholarly journals Interplay between Zeeman Coupling and Swap Action in Spin-Based Quantum Computer Models: Error Correction in Inhomogeneous Magnetic Fields

2001 ◽  
Vol 86 (5) ◽  
pp. 918-921 ◽  
Author(s):  
Xuedong Hu ◽  
Rogerio de Sousa ◽  
S. Das Sarma
Keyword(s):  
Magnetic Fields ◽  
Error Correction ◽  
Quantum Computer ◽  
Computer Models

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.

Error correction for a spin quantum computer

1997 ◽  
Vol 55 (9) ◽  
pp. 5929-5936 ◽  
Author(s):  
Gennady P. Berman ◽  
David K. Campbell ◽  
Vladimir I. Tsifrinovich
Keyword(s):  
Error Correction ◽  
Quantum Computer ◽  
Spin Quantum

Resistive transition broadening in two-phase polycrystalline YBaCuO

1993 ◽  
Vol 8 (5) ◽  
pp. 957-961 ◽  
Author(s):  
J.C. Abele ◽  
R.L. Bristol ◽  
T.C. Nguyen ◽  
M.W. Ohmer ◽  
L.S. Wood
Keyword(s):  
Magnetic Fields ◽  
Computer Models ◽  
Structured Data ◽  
The Other ◽  
Critical Ratio ◽  
Resistive Transition ◽  
Two Phase ◽  
Two Phases

A model proposed by Tinkham1to explain the resistance versus temperature broadening found in highTcsuperconductors in applied magnetic fields is extended to “foot and knee”-structured data taken on polycrystalline YBa2Cu3O6+δ. The proposed extension involves a series combination of two types of superconductors. For this series combination to result, a critical ratio of the two types of superconductors must be met—a result common to both percolation and randomized cellular autonoma theory. This critical ratio is investigated via statistical computer models of a polycrystalline superconductor having two phases of crystallites—one with substantially lowerJcthan the other.

scholarly journals Automated error correction in IBM quantum computer and explicit generalization

2018 ◽  
Vol 17 (6) ◽  
Author(s):  
Debjit Ghosh ◽  
Pratik Agarwal ◽  
Pratyush Pandey ◽  
Bikash K. Behera ◽  
Prasanta K. Panigrahi
Keyword(s):  
Error Correction ◽  
Quantum Computer

Performance of topological quantum error correction in the presence of correlated noise

2018 ◽  
Vol 18 (9&10) ◽  
pp. 743-778
Author(s):  
Muhammad Ahsan ◽  
Syed Abbas Zilqurnain Naqvi
Keyword(s):  
Error Correction ◽  
Noise Level ◽  
Quantum Computer ◽  
Quantum Error Correction ◽  
Noise Model ◽  
Correlated Noise ◽  
Computational Accuracy ◽  
Topological Quantum ◽  
Large Numbers ◽  
Quantum Error

We investigate the efficacy of topological quantum error-correction in correlated noise model which permits collective coupling of all the codeword qubits to the same non-Markovian environment. In this noise model, the probability distribution over set of phase-flipped qubits, decays sub-exponentially in the size of the set and carries non-trivial likelihood of the occurring large numbers of qubits errors. We find that in the presence of noise correlation, one cannot guarantee arbitrary high computational accuracy simply by incrementing the codeword size while retaining constant noise level per qubit operation. However, if instead, per-operation qubit error probability in an n-qubits long codeword is reduced O(\sqrt{n}) times below the accuracy threshold, arbitrarily accurate quantum computation becomes feasible with acceptable scaling of the codeword size. Our results suggest that progressively reducing noise level in qubits and gates is as important as continuously integrating more qubits to realize scalable and reliable quantum computer.

scholarly journals Targeting Molecular Quantum Memory with Embedded Error Correction

2021 ◽  
Author(s):  
Selena Lockyer ◽  
Alessandro Chiesa ◽  
Grigore A. Timco ◽  
Thomas M Bennett ◽  
Inigo Vitorica-Yrzebal ◽  
...  
Keyword(s):  
Error Correction ◽  
Quantum Computer ◽  
Fault Tolerant ◽  
Environmental Noise ◽  
Quantum Memory ◽  
Quantum Operations

The implementation of a quantum computer requires both to protect information from environmental noise and to implement quantum operations efficiently. Achieving this by a fully fault-tolerant platform, in which quantum...

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