Explanipedia

Low Depth Color Code Circuits with CXSWAP gate Open

Satoshi Yoshida, Craig Gidney, Matt McEwen, Adam Zalcman · 2025

We present two new types of syndrome extraction circuits for the color code. Our first construction, which after [M. McEwen, D. Bacon, and C. Gidney, Quantum 7, 1172 (2023)] we call the semi-wiggling color code, promises to mitigate leakag…

Scaling and logic in the colour code on a superconducting quantum processor Open

Nathan Lacroix, Alexandre Bourassa, Francisco J. H. Heras, L. M. Zhang, Johannes Bausch , et al. · 2025

Scaling and logic in the color code on a superconducting quantum processor Open

Nathan Lacroix, Alexandre Bourassa, Francisco J. H. Heras, Lei M. Zhang, Johannes Bausch , et al. · 2024

Quantum error correction is essential for bridging the gap between the error rates of physical devices and the extremely low logical error rates required for quantum algorithms. Recent error-correction demonstrations on superconducting pro…

Demonstrating dynamic surface codes Open

Alec Eickbusch, Matt McEwen, Volodymyr Sivak, Alexandre Bourassa, Juan Atalaya , et al. · 2024

A remarkable characteristic of quantum computing is the potential for reliable computation despite faulty qubits. This can be achieved through quantum error correction, which is typically implemented by repeatedly applying static syndrome …

Resisting High-Energy Impact Events through Gap Engineering in Superconducting Qubit Arrays Open

Matt McEwen, Kevin C. Miao, Juan Atalaya, Alexander Bilmes, Alex Crook , et al. · 2024

Quantum error correction (QEC) provides a practical path to fault-tolerant quantum computing through scaling to large qubit numbers, assuming that physical errors are sufficiently uncorrelated in time and space. In superconducting qubit ar…

LUCI in the Surface Code with Dropouts Open

Dripto M. Debroy, Matt McEwen, Craig Gidney, Noah Shutty, Adam Zalcman · 2024

Recently, usage of detecting regions facilitated the discovery of new circuits for fault-tolerantly implementing the surface code. Building on these ideas, we present LUCI, a framework for constructing fault-tolerant circuits flexible enou…

Resilience of the surface code to error bursts Open

Shi Jie Samuel Tan, Christopher A. Pattison, Matt McEwen, John Preskill · 2024

Quantum error correction works effectively only if the error rate of gate operations is sufficiently low. However, some rare physical mechanisms can cause a temporary increase in the error rate that affects many qubits; examples include io…

Resisting high-energy impact events through gap engineering in superconducting qubit arrays Open

Matt McEwen, Kevin C. Miao, Juan Atalaya, Alex Bilmes, Alex Crook , et al. · 2024

Quantum error correction (QEC) provides a practical path to fault-tolerant quantum computing through scaling to large qubit numbers, assuming that physical errors are sufficiently uncorrelated in time and space. In superconducting qubit ar…

Relaxing Hardware Requirements for Surface Code Circuits using Time-dynamics Open

Matt McEwen, Dave Bacon, Craig Gidney · 2023

The typical time-independent view of quantum error correction (QEC) codes hides significant freedom in the decomposition into circuits that are executable on hardware. Using the concept of detecting regions, we design time-dynamic QEC circ…

Measurement-induced entanglement and teleportation on a noisy quantum processor Open

Jesse C. Hoke, Matteo Ippoliti, Eliott Rosenberg, Dmitry A. Abanin, Rajeev Acharya , et al. · 2023

Overcoming leakage in quantum error correction Open

Kevin C. Miao, Matt McEwen, Juan Atalaya, Dvir Kafri, Leonid P. Pryadko , et al. · 2023

Quantum information phases in space-time: measurement-inducedentanglement and teleportation on a noisy quantum processor Open

Jesse C. Hoke, Matteo Ippoliti, Dmitry A. Abanin, Rajeev Acharya, M. Ansmann , et al. · 2023

Measurement has a special role in quantum theory 1 : by collapsing the wavefunction it can enable phenomena such as teleportation 2 and thereby alter the "arrow of time" that constrains unitary evolution. When integrated in many-body dynam…

Measurement-induced entanglement and teleportation on a noisy quantum processor Open

Jesse C. Hoke, Matteo Ippoliti, Eliott Rosenberg, Dmitry A. Abanin, Rajeev Acharya , et al. · 2023

Measurement has a special role in quantum theory: by collapsing the wavefunction it can enable phenomena such as teleportation and thereby alter the "arrow of time" that constrains unitary evolution. When integrated in many-body dynamics, …

Data for "Relaxing Hardware Requirements for Surface Code Circuits using Time-dynamics" Open

Matt McEwen, Dave Bacon, Craig Gidney · 2023

Includes the circuit files for each benchmarked stim circuit (circuits.zip), the raw statistics for each memory experiment (stats.csv), the 'fused' stats combining the X and Z error rates to represent the liklihood that neither logical obs…

Data for "Relaxing Hardware Requirements for Surface Code Circuits using Time-dynamics" Open

Matt McEwen, Dave Bacon, Craig Gidney · 2023

Includes the circuit files for each benchmarked stim circuit (circuits.zip), the raw statistics for each memory experiment (stats.csv), the 'fused' stats combining the X and Z error rates to represent the liklihood that neither logical obs…

Relaxing Hardware Requirements for Surface Code Circuits using Time-dynamics Open

Matt McEwen, Dave Bacon, Craig Gidney · 2023

The typical time-independent view of quantum error correction (QEC) codes hides significant freedom in the decomposition into circuits that are executable on hardware. Using the concept of detecting regions, we design time-dynamic QEC circ…

Measurement-Induced State Transitions in a Superconducting Qubit: Within the Rotating Wave Approximation Open

Mostafa Khezri, Alex Opremcak, Zijun Chen, Kevin C. Miao, Matt McEwen , et al. · 2022

Superconducting qubits typically use a dispersive readout scheme, where a resonator is coupled to a qubit such that its frequency is qubit-state dependent. Measurement is performed by driving the resonator, where the transmitted resonator …

Formation of robust bound states of interacting microwave photons Open

Alexis Morvan, T. I. Andersen, Xiao Mi, Charles Neill, A. Petukhov , et al. · 2022

Data for "Overcoming leakage in scalable quantum error correction" Open

Kevin C. Miao, Matt McEwen, Juan Atalaya, Google Quantum AI · 2022

Datasets for "Overcoming leakage in scalable quantum error correction" Figure 1c: distance3_spatial.zip Figure 2b: leakage_transport.zip Figure 2e: leakage_phase.zip Figure 3a, 3c: distance3_slicing.zip Figure 4a: distance…

Overcoming leakage in scalable quantum error correction Open

Kevin C. Miao, Matt McEwen, Juan Atalaya, Dvir Kafri, Leonid P. Pryadko , et al. · 2022

Leakage of quantum information out of computational states into higher energy states represents a major challenge in the pursuit of quantum error correction (QEC). In a QEC circuit, leakage builds over time and spreads through multi-qubit …

Benchmarking the Planar Honeycomb Code Open

Craig Gidney, Michael Newman, Matt McEwen · 2022

We improve the planar honeycomb code by describing boundaries that need no additional physical connectivity, and by optimizing the shape of the qubit patch. We then benchmark the code using Monte Carlo sampling to estimate logical error ra…

Readout of a quantum processor with high dynamic range Josephson parametric amplifiers Open

T. C. White, Alex Opremcak, George Sterling, Alexander N. Korotkov, D. Sank , et al. · 2022

We demonstrate a high dynamic range Josephson parametric amplifier (JPA) in which the active nonlinear element is implemented using an array of rf-SQUIDs. The device is matched to the 50 $Ω$ environment with a Klopfenstein-taper impedance …

Data for "Benchmarking the Planar Honeycomb Code" Open

Craig Gidney, Michael Newman, Matt McEwen · 2022

Contains the python code used to create the honeycomb circuits, the circuits that were generated, and the sample statistics collected from those circuits.

Data for "Benchmarking the Planar Honeycomb Code" Open

Craig Gidney, Michael Newman, Matt McEwen · 2022

Contains the python code used to create the honeycomb circuits, the circuits that were generated, and the sample statistics collected from those circuits.

Formation of robust bound states of interacting photons Open

Alexis Morvan, Trond I. Andersen, Mi Xiao, Charles Neill, A. G. Petukhov , et al. · 2022

Data and analysis scripts for the manuscript https://arxiv.org/abs/2206.05254

Noise-resilient Edge Modes on a Chain of Superconducting Qubits Open

Mi Xiao, Michael Sonner, Murphy Yuezhen Niu, Kenneth W. Lee, Brooks Foxen , et al. · 2022

Inherent symmetry of a quantum system may protect its otherwise fragile states. Leveraging such protection requires testing its robustness against uncontrolled environmental interactions. Using 47 superconducting qubits, we implement the o…

Benchmarking the Planar Honeycomb Code Open

Craig Gidney, Michael Newman, Matt McEwen · 2022

We improve the planar honeycomb code by describing boundaries that need no additional physical connectivity, and by optimizing the shape of the qubit patch. We then benchmark the code using Monte Carlo sampling to estimate logical error ra…

Resolving catastrophic error bursts from cosmic rays in large arrays of superconducting qubits Open

Matt McEwen, Lara Faoro, Kunal Arya, A. Dunsworth, Trent Huang , et al. · 2021

Realizing topologically ordered states on a quantum processor Open

Kevin J. Satzinger, Yu-Jie Liu, Adam Smith, Christina Knapp, Michael Newman , et al. · 2021

Synthesizing topological order Topologically ordered matter exhibits long-range quantum entanglement. However, measuring this entanglement in real materials is extremely tricky. Now, two groups take a different approach and turn to synthet…

Data for "Realizing topologically ordered states on a quantum processor" Open

Kevin J. Satzinger, Yu-Jie Liu, Adam Smith, Christina Knapp, Michael Newman , et al. · 2021

Data and code used in "Realizing topologically ordered states on a quantum processor," Satzinger et al. (2021), preprint at https://arxiv.org/abs/2104.01180

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