# Superconducting Quantum Processors Domain: Quantum Computing & Information · 253 papers indexed · newest 2026-10-27 Transmon, fluxonium and bosonic cat qubits; coherence, gate fidelity, leakage, cosmic-ray errors, packaging and scaling of superconducting processors. Key concepts: transmon, fluxonium, superconducting qubit, cat qubit, superconducting quantum processor, coherence, two-qubit gate ## Most influential - **[Quantum supremacy using a programmable superconducting processor](https://space-kitty.com/papers/arxiv:1910.11333)**. Frank Arute, Kunal Arya, Ryan Babbush et al. · 2019 · Nature (arXiv:1910.11333 · doi:10.1038/s41586-019-1666-5 · 7,735 citations). Source: > This is an updated version of supplementary information to accompany "Quantum supremacy using a programmable superconducting processor", an article published in the October 24, 2019 issue of Nature. The main article is freely available at https://www.nature.com/articles/s41586-019-1666-5. Summary of changes since arXiv:1910.11333v1 (submitted 23 Oct 2019): added URL for qFlex source code; added Erratum section; added Figure S41 comparing statistical and total uncertainty for log and linear XEB; new References \[1,65\]; miscellaneous updates for clarity and style consistency; miscellaneous typogr… - **[Hardware-efficient variational quantum eigensolver for small molecules and quantum magnets](https://space-kitty.com/papers/arxiv:1704.05018)**. Abhinav Kandala, Antonio Mezzacapo, Kristan Temme et al. · 2017 · Nature (arXiv:1704.05018 · doi:10.1038/nature23879 · 2,988 citations). Source: > Quantum computers can be used to address molecular structure, materials science and condensed matter physics problems, which currently stretch the limits of existing high-performance computing resources. Finding exact numerical solutions to these interacting fermion problems has exponential cost, while Monte Carlo methods are plagued by the fermionic sign problem. These limitations of classical computational methods have made even few-atom molecular structures problems of practical interest for medium-sized quantum computers. Yet, thus far experimental implementations have been restricted to m… - **[Superconducting Circuits for Quantum Information: An Outlook](https://space-kitty.com/papers/doi:10.1126/science.1231930)**. Michel Devoret, Robert J. Schoelkopf · 2013 · Science (doi:10.1126/science.1231930 · 2,122 citations). Source: - **[Engineering Non-Linear Decay Dynamics: Pulse-Level Control and Software-Defined Qubit Rescue on Superconducting Processors](https://space-kitty.com/papers/doi:10.5281/zenodo.18067974)**. K S, Unnikuttan · 2025 · Zenodo (CERN European Organization for Nuclear Research) (doi:10.5281/zenodo.18067974 · 736 citations). Source: > The scalability of Noisy Intermediate-Scale Quantum (NISQ) devices is currently constrained by material defects, specifically Two-Level Systems (TLS) that induce resonant decoherence in superconducting qubits. This study presents a comprehensive experimental analysis using the IBM Quantum ibm\_fez processor to demonstrate "Software-Defined Hardware" optimization. By employing a novel "Instruction-Level Calibration Injection" technique, we bypass standard compiler constraints to inject continuous off-resonant AC Stark drives ($N\_{shots} = 4096$). Methodology The experiment utilizes a Floquet eng… > _Abstract excerpt by K S, Unnikuttan, CC-BY, https://doi.org/10.5281/zenodo.18067974; truncated._ - **[Evidence for the utility of quantum computing before fault tolerance](https://space-kitty.com/papers/doi:10.1038/s41586-023-06096-3)**. Young‐Seok Kim, Andrew Eddins, Sajant Anand et al. · 2023 · Nature (doi:10.1038/s41586-023-06096-3 · 1,049 citations). Source: > Abstract Quantum computing promises to offer substantial speed-ups over its classical counterpart for certain problems. However, the greatest impediment to realizing its full potential is noise that is inherent to these systems. The widely accepted solution to this challenge is the implementation of fault-tolerant quantum circuits, which is out of reach for current processors. Here we report experiments on a noisy 127-qubit processor and demonstrate the measurement of accurate expectation values for circuit volumes at a scale beyond brute-force classical computation. We argue that this represe… > _Abstract excerpt by Young‐Seok Kim et al., CC-BY, https://doi.org/10.1038/s41586-023-06096-3; truncated._ - **[Quantum annealing with manufactured spins](https://space-kitty.com/papers/doi:10.1038/nature10012)**. Mark W. Johnson, M. H. S. Amin, S. Gildert et al. · 2011 · Nature (doi:10.1038/nature10012 · 1,893 citations). Source: - **[Superconducting quantum circuits at the surface code threshold for fault tolerance](https://space-kitty.com/papers/arxiv:1402.4848)**. R. Barends, J. Kelly, A. Megrant et al. · 2014 · Nature (arXiv:1402.4848 · doi:10.1038/nature13171 · 1,741 citations). Source: > A quantum computer can solve hard problems - such as prime factoring, database searching, and quantum simulation - at the cost of needing to protect fragile quantum states from error. Quantum error correction provides this protection, by distributing a logical state among many physical qubits via quantum entanglement. Superconductivity is an appealing platform, as it allows for constructing large quantum circuits, and is compatible with microfabrication. For superconducting qubits the surface code is a natural choice for error correction, as it uses only nearest-neighbour coupling and rapidly-… - **[Non-Abelian statistics and topological quantum information processing in 1D wire networks](https://space-kitty.com/papers/arxiv:1006.4395)**. Jason Alicea, Yuval Oreg A, Gil Refael et al. · 2011 · Nature Physics (arXiv:1006.4395 · doi:10.1038/nphys1915 · 1,637 citations). Source: > Topological quantum computation provides an elegant way around decoherence, as one encodes quantum information in a non-local fashion that the environment finds difficult to corrupt. Here we establish that one of the key operations---braiding of non-Abelian anyons---can be implemented in one-dimensional semiconductor wire networks. Previous work \[Lutchyn et al., arXiv:1002.4033 and Oreg et al., arXiv:1003.1145\] provided a recipe for driving semiconducting wires into a topological phase supporting long-sought particles known as Majorana fermions that can store topologically protected quantum in… - **[Quantum error correction below the surface code threshold](https://space-kitty.com/papers/arxiv:2408.13687)**. Rajeev Acharya, Laleh Aghababaie-Beni, Igor Aleiner et al. · 2024 · Nature 638 (2025) 920-926 (arXiv:2408.13687 · doi:10.1038/s41586-024-08449-y · 774 citations). Source: > Quantum error correction provides a path to reach practical quantum computing by combining multiple physical qubits into a logical qubit, where the logical error rate is suppressed exponentially as more qubits are added. However, this exponential suppression only occurs if the physical error rate is below a critical threshold. In this work, we present two surface code memories operating below this threshold: a distance-7 code and a distance-5 code integrated with a real-time decoder. The logical error rate of our larger quantum memory is suppressed by a factor of $Λ$ = 2.14 $\\pm$ 0.02 when inc… - **[Strong Quantum Computational Advantage Using a Superconducting Quantum Processor](https://space-kitty.com/papers/arxiv:2106.14734)**. Yulin Wu, Wan‐Su Bao, Sirui Cao et al. · 2021 · Physical Review Letters (arXiv:2106.14734 · doi:10.1103/physrevlett.127.180501 · 1,058 citations). Source: > Scaling up to a large number of qubits with high-precision control is essential in the demonstrations of quantum computational advantage to exponentially outpace the classical hardware and algorithmic improvements. Here, we develop a two-dimensional programmable superconducting quantum processor, \\textit{Zuchongzhi}, which is composed of 66 functional qubits in a tunable coupling architecture. To characterize the performance of the whole system, we perform random quantum circuits sampling for benchmarking, up to a system size of 56 qubits and 20 cycles. The computational cost of the classical … - **[Circuit quantum electrodynamics in the ultrastrong-coupling regime](https://space-kitty.com/papers/arxiv:1003.2376)**. T. Niemczyk, Frank Deppe, Hans Huebl et al. · 2010 · Nature Physics (arXiv:1003.2376 · doi:10.1038/nphys1730 · 1,324 citations). Source: > In cavity quantum electrodynamics (QED), light-matter interaction is probed at its most fundamental level, where individual atoms are coupled to single photons stored in three-dimensional cavities. This unique possibility to experimentally explore the foundations of quantum physics has greatly evolved with the advent of circuit QED, where on-chip superconducting qubits and oscillators play the roles of two-level atoms and cavities, respectively. In the strong coupling limit, atom and cavity can exchange a photon frequently before coherence is lost. This important regime has been reached both i… - **[Quantum information processing with superconducting circuits: a review](https://space-kitty.com/papers/arxiv:1610.02208)**. Goran P. Wendin · 2017 · Reports on Progress in Physics (arXiv:1610.02208 · doi:10.1088/1361-6633/aa7e1a · 977 citations). Source: > During the last ten years, superconducting circuits have passed from being interesting physical devices to becoming contenders for near-future useful and scalable quantum information processing (QIP). Advanced quantum simulation experiments have been shown with up to nine qubits, while a demonstration of Quantum Supremacy with fifty qubits is anticipated in just a few years. Quantum Supremacy means that the quantum system can no longer be simulated by the most powerful classical supercomputers. Integrated classical-quantum computing systems are already emerging that can be used for software de… - **[Extending the lifetime of a quantum bit with error correction in superconducting circuits](https://space-kitty.com/papers/doi:10.1038/nature18949)**. Nissim Ofek, Andrei Petrenko, Reinier Heeres et al. · 2016 · Nature (doi:10.1038/nature18949 · 944 citations). Source: - **[Error mitigation extends the computational reach of a noisy quantum processor](https://space-kitty.com/papers/arxiv:1805.04492)**. Abhinav Kandala, Kristan Temme, Antonio D. Corcoles et al. · 2019 · Nature (arXiv:1805.04492 · doi:10.1038/s41586-019-1040-7 · 875 citations). Source: > Quantum computation, a completely different paradigm of computing, benefits from theoretically proven speed-ups for certain problems and opens up the possibility of exactly studying the properties of quantum systems. Yet, because of the inherent fragile nature of the physical computing elements, qubits, achieving quantum advantages over classical computation requires extremely low error rates for qubit operations as well as a significant overhead of physical qubits, in order to realize fault-tolerance via quantum error correction. However, recent theoretical work has shown that the accuracy of… - **[Hartree-Fock on a superconducting qubit quantum computer](https://space-kitty.com/papers/arxiv:2004.04174)**. Google AI Quantum and Collaborators, Frank Arute, Kunal Arya et al. · 2020 · Science (arXiv:2004.04174 · doi:10.1126/science.abb9811 · 830 citations). Source: > As the search continues for useful applications of noisy intermediate scale quantum devices, variational simulations of fermionic systems remain one of the most promising directions. Here, we perform a series of quantum simulations of chemistry the largest of which involved a dozen qubits, 78 two-qubit gates, and 114 one-qubit gates. We model the binding energy of ${\\rm H}\_6$, ${\\rm H}\_8$, ${\\rm H}\_{10}$ and ${\\rm H}\_{12}$ chains as well as the isomerization of diazene. We also demonstrate error-mitigation strategies based on $N$-representability which dramatically improve the effective fideli… ## Newest - **[Coherent Optical Control of a Single Donor Electron Spin](https://space-kitty.com/papers/arxiv:2610.36423)**. Yuxi Jiang, Amirehsan Alizadehherfati, Christine Falter et al. · 2026 (arXiv:2610.36423). Source: - **[Nano-Nb Superconducting 3D Josephson Junctions Arrays in Cu-Normal Matrix: Superconducting Phase Coherence and Quantum Fluctuations Properties](https://space-kitty.com/papers/arxiv:2610.36482)**. R. L. de Almeida, J. Albino Aguiar, J. A. H. Coaquira · 2026 (arXiv:2610.36482). Source: - **[Controlled Dark-State Energy Storage and Work Extraction in V-Type Quantum Batteries](https://space-kitty.com/papers/arxiv:2610.36704)**. Chia-Hung Chu, H. H. Jen · 2026 (arXiv:2610.36704). Source: - **[Exact decoherence dynamics of a detector coupled to vacuum fluctuations in bounded geometries](https://space-kitty.com/papers/arxiv:2610.37087)**. Zi'an Zhao, Wenting Zhou · 2026 (arXiv:2610.37087). Source: - **[Generative quantum extreme learning machines](https://space-kitty.com/papers/arxiv:2610.37116)**. Marcin Płodzień · 2026 (arXiv:2610.37116). Source: - **[Recovering classical gauge geometry from quantum master constraints](https://space-kitty.com/papers/arxiv:2610.37493)**. Alejandro Corichi · 2026 (arXiv:2610.37493). Source: - **[Optimal quantum discrimination at Liouvillian exceptional points](https://space-kitty.com/papers/arxiv:2610.37660)**. Aritra Ghosh, M. Bhattacharya · 2026 (arXiv:2610.37660). Source: - **[Neutrinos as Quantum Information Carriers? A Gap Analysis Against the DiVincenzo Criteria](https://space-kitty.com/papers/arxiv:2610.34666)**. Ramanuj Awasthi · 2026 (arXiv:2610.34666). Source: - **[Quantum ordinal selection with two comparisons](https://space-kitty.com/papers/arxiv:2610.34762)**. Hongyu Wu · 2026 (arXiv:2610.34762). Source: - **[Measure of set coherence](https://space-kitty.com/papers/arxiv:2610.34784)**. Jiabo Panel, Yu Guo, Yuqin Wang · 2026 (arXiv:2610.34784). Source: --- Space Kitty Archive · https://space-kitty.com · API: https://space-kitty.com/api/v1 · MCP: https://space-kitty.com/mcp · Premium: $0.20/request via x402 (Base Sepolia (testnet)). Metadata: arXiv (CC0), OpenAlex (CC0), Europe PMC (CC BY/CC0 works), ClinicalTrials.gov.