Superconducting Quantum Processors
Transmon, fluxonium and bosonic cat qubits; coherence, gate fidelity, leakage, cosmic-ray errors, packaging and scaling of superconducting processors.
Most influential
- Quantum supremacy using a programmable superconducting processor
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): a…
Article7,735 citationsarXiv:1910.11333doi:10.1038/s41586-019-1666-5 - Hardware-efficient variational quantum eigensolver for small molecules and quantum magnets
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 pr…
Article2,988 citationsarXiv:1704.05018doi:10.1038/nature23879 - Superconducting Circuits for Quantum Information: An OutlookArticle2,122 citationsdoi:10.1126/science.1231930
- Engineering Non-Linear Decay Dynamics: Pulse-Level Control and Software-Defined Qubit Rescue on Superconducting Processors
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" optimizat…
Abstract excerpt by K S, Unnikuttan, CC-BY, https://doi.org/10.5281/zenodo.18067974; truncated.
Article736 citationsdoi:10.5281/zenodo.18067974 - Evidence for the utility of quantum computing before fault tolerance
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 …
Abstract excerpt by Young‐Seok Kim et al., CC-BY, https://doi.org/10.1038/s41586-023-06096-3; truncated.
Article1,049 citationsdoi:10.1038/s41586-023-06096-3 - Quantum annealing with manufactured spinsArticle1,893 citationsdoi:10.1038/nature10012
- Superconducting quantum circuits at the surface code threshold for fault tolerance
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 platfo…
Article1,741 citationsarXiv:1402.4848doi:10.1038/nature13171 - Non-Abelian statistics and topological quantum information processing in 1D wire networks
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 …
Article1,637 citationsarXiv:1006.4395doi:10.1038/nphys1915 - Quantum error correction below the surface code threshold
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 su…
Article774 citationsarXiv:2408.13687doi:10.1038/s41586-024-08449-y - Strong Quantum Computational Advantage Using a Superconducting Quantum Processor
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…
Article1,058 citationsarXiv:2106.14734doi:10.1103/physrevlett.127.180501 - Circuit quantum electrodynamics in the ultrastrong-coupling regime
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 superconduc…
Article1,324 citationsarXiv:1003.2376doi:10.1038/nphys1730 - Quantum information processing with superconducting circuits: a review
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 …
Article977 citationsarXiv:1610.02208doi:10.1088/1361-6633/aa7e1a - Extending the lifetime of a quantum bit with error correction in superconducting circuitsArticle944 citationsdoi:10.1038/nature18949
- Error mitigation extends the computational reach of a noisy quantum processor
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…
Article875 citationsarXiv:1805.04492doi:10.1038/s41586-019-1040-7 - Hartree-Fock on a superconducting qubit quantum computer
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 ene…
Article830 citationsarXiv:2004.04174doi:10.1126/science.abb9811
Newest work
- Coherent Optical Control of a Single Donor Electron SpinPreprintarXiv:2610.36423
- Nano-Nb Superconducting 3D Josephson Junctions Arrays in Cu-Normal Matrix: Superconducting Phase Coherence and Quantum Fluctuations PropertiesPreprintarXiv:2610.36482
- Controlled Dark-State Energy Storage and Work Extraction in V-Type Quantum BatteriesPreprintarXiv:2610.36704
- Exact decoherence dynamics of a detector coupled to vacuum fluctuations in bounded geometriesPreprintarXiv:2610.37087
- Generative quantum extreme learning machinesPreprintarXiv:2610.37116
- Recovering classical gauge geometry from quantum master constraintsPreprintarXiv:2610.37493
- Optimal quantum discrimination at Liouvillian exceptional pointsPreprintarXiv:2610.37660
- Neutrinos as Quantum Information Carriers? A Gap Analysis Against the DiVincenzo CriteriaPreprintarXiv:2610.34666
- Quantum ordinal selection with two comparisonsPreprintarXiv:2610.34762
- Measure of set coherencePreprintarXiv:2610.34784