scholarly journals Quantum Emulation of Coherent Backscattering in a System of Superconducting Qubits

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Ana Laura Gramajo ◽  
Dan Campbell ◽  
Bharath Kannan ◽  
David K. Kim ◽  
Alexander Melville ◽  
...  
Keyword(s):  
Superconducting Qubits ◽  
Coherent Backscattering

Superconducting qubits in a flip-chip architecture

2021 ◽  
Vol 118 (23) ◽  
pp. 232602
Author(s):  
C. R. Conner ◽  
A. Bienfait ◽  
H.-S. Chang ◽  
M.-H. Chou ◽  
É. Dumur ◽  
...  
Keyword(s):  
Flip Chip ◽  
Superconducting Qubits

scholarly journals Exponential suppression of bit or phase errors with cyclic error correction

Nature ◽  
2021 ◽  
Vol 595 (7867) ◽  
pp. 383-387
Author(s):  
◽  
Zijun Chen ◽  
Kevin J. Satzinger ◽  
Juan Atalaya ◽  
Alexander N. Korotkov ◽  
...  
Keyword(s):  
Error Correction ◽  
Error Detection ◽  
Fault Tolerant ◽  
Error Rates ◽  
Quantum Error Correction ◽  
Superconducting Qubits ◽  
Two Dimensional ◽  
Logical Error ◽  
Quantum Error ◽  
Logical Qubit

AbstractRealizing the potential of quantum computing requires sufficiently low logical error rates1. Many applications call for error rates as low as 10−15 (refs. 2–9), but state-of-the-art quantum platforms typically have physical error rates near 10−3 (refs. 10–14). Quantum error correction15–17 promises to bridge this divide by distributing quantum logical information across many physical qubits in such a way that errors can be detected and corrected. Errors on the encoded logical qubit state can be exponentially suppressed as the number of physical qubits grows, provided that the physical error rates are below a certain threshold and stable over the course of a computation. Here we implement one-dimensional repetition codes embedded in a two-dimensional grid of superconducting qubits that demonstrate exponential suppression of bit-flip or phase-flip errors, reducing logical error per round more than 100-fold when increasing the number of qubits from 5 to 21. Crucially, this error suppression is stable over 50 rounds of error correction. We also introduce a method for analysing error correlations with high precision, allowing us to characterize error locality while performing quantum error correction. Finally, we perform error detection with a small logical qubit using the 2D surface code on the same device18,19 and show that the results from both one- and two-dimensional codes agree with numerical simulations that use a simple depolarizing error model. These experimental demonstrations provide a foundation for building a scalable fault-tolerant quantum computer with superconducting qubits.

scholarly journals Coherent router for quantum networks with superconducting qubits

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
K. S. Christensen ◽  
S. E. Rasmussen ◽  
D. Petrosyan ◽  
N. T. Zinner
Keyword(s):  
Superconducting Qubits ◽  
Quantum Networks

Coherent Backscattering of Light in a Quasi-Two-Dimensional System

1988 ◽  
Vol 61 (10) ◽  
pp. 1214-1217 ◽  
Author(s):  
Isaac Freund ◽  
Michael Rosenbluh ◽  
Richard Berkovits ◽  
Moshe Kaveh
Keyword(s):  
Dimensional System ◽  
Two Dimensional ◽  
Coherent Backscattering ◽  
Two Dimensional System

scholarly journals Controllable Coherent Population Transfers in Superconducting Qubits for Quantum Computing

2008 ◽  
Vol 100 (11) ◽  
Author(s):  
L. F. Wei ◽  
J. R. Johansson ◽  
L. X. Cen ◽  
S. Ashhab ◽  
Franco Nori
Keyword(s):  
Quantum Computing ◽  
Superconducting Qubits
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