698 citations · 1.7k across the 18 of their papers we have counts for
18 papers
Performance Characterization of a Multi-Module Quantum Processor with Static Inter-Chip Couplers
Graham J. Norris, Kieran Dalton, Dante Colao Zanuz +8
Three-dimensional integration technologies such as flip-chip bonding are a key prerequisite to realize large-scale superconducting quantum processors. Modular architectures, in whi…
Experimentally Informed Decoding of Stabilizer Codes Based on Syndrome Correlations
Ants Remm, Nathan Lacroix, Lukas Bödeker +9
High-fidelity decoding of quantum error correction codes relies on an accurate experimental model of the physical errors occurring in the device. Because error probabilities can de…
Mitigating Losses of Superconducting Qubits Strongly Coupled to Defect Modes
Dante Colao Zanuz, Quentin Ficheux, Laurent Michaud +16
The dominant contribution to the energy relaxation of state-of-the-art superconducting qubits is often attributed to their coupling to an ensemble of material defects which behave…
Fast Flux-Activated Leakage Reduction for Superconducting Quantum Circuits
Nathan Lacroix, Luca Hofele, Ants Remm +14
Quantum computers will require quantum error correction to reach the low error rates necessary for solving problems that surpass the capabilities of conventional computers. One of…
Enhancing Dispersive Readout of Superconducting Qubits Through Dynamic Control of the Dispersive Shift: Experiment and Theory
François Swiadek, Ross Shillito, Paul Magnard +9
The performance of a wide range of quantum computing algorithms and protocols depends critically on the fidelity and speed of the employed qubit readout. Examples include gate sequ…
Improved Parameter Targeting in 3D-Integrated Superconducting Circuits through a Polymer Spacer Process
Graham J. Norris, Laurent Michaud, David Pahl +4
Three-dimensional device integration facilitates the construction of superconducting quantum information processors with more than several tens of qubits by distributing elements s…
Calibration of Drive Non-Linearity for Arbitrary-Angle Single-Qubit Gates Using Error Amplification
Stefania Lazăr, Quentin Ficheux, Johannes Herrmann +12
The ability to execute high-fidelity operations is crucial to scaling up quantum devices to large numbers of qubits. However, signal distortions originating from non-linear compone…
Realizing a deep reinforcement learning agent discovering real-time feedback control strategies for a quantum system
Kevin Reuer, Jonas Landgraf, Thomas Fösel +10
To realize the full potential of quantum technologies, finding good strategies to control quantum information processing devices in real time becomes increasingly important. Usuall…
Intermodulation Distortion in a Josephson Traveling Wave Parametric Amplifier
Ants Remm, Sebastian Krinner, Nathan Lacroix +5
Josephson traveling wave parametric amplifiers enable the amplification of weak microwave signals close to the quantum limit with large bandwidth, which has a broad range of applic…
Frequency Up-Conversion Schemes for Controlling Superconducting Qubits
Johannes Herrmann, Christoph Hellings, Stefania Lazar +8
High-fidelity control of superconducting qubits requires the generation of microwave-frequency pulses precisely tailored on nanosecond timescales. These pulses are most commonly sy…
Realizing Repeated Quantum Error Correction in a Distance-Three Surface Code
Sebastian Krinner, Nathan Lacroix, Ants Remm +13
Quantum computers hold the promise of solving computational problems which are intractable using conventional methods. For fault-tolerant operation quantum computers must correct e…
Building Blocks of a Flip-Chip Integrated Superconducting Quantum Processor
Sandoko Kosen, Hang-Xi Li, Marcus Rommel +24
We have integrated single and coupled superconducting transmon qubits into flip-chip modules. Each module consists of two chips -- one quantum chip and one control chip -- that are…
Realizing Quantum Convolutional Neural Networks on a Superconducting Quantum Processor to Recognize Quantum Phases
Johannes Herrmann, Sergi Masot Llima, Ants Remm +15
Quantum computing crucially relies on the ability to efficiently characterize the quantum states output by quantum hardware. Conventional methods which probe these states through d…
Realization of a Universal Quantum Gate Set for Itinerant Microwave Photons
Kevin Reuer, Jean-Claude Besse, Lucien Wernli +5
Deterministic photon-photon gates enable the controlled generation of entanglement between mobile carriers of quantum information. Such gates have thus far been exclusively realize…
Realizing a Deterministic Source of Multipartite-Entangled Photonic Qubits
Jean-Claude Besse, Kevin Reuer, Michele C. Collodo +11
Sources of entangled electromagnetic radiation are a cornerstone in quantum information processing and offer unique opportunities for the study of quantum many-body physics in a co…
Benchmarking Coherent Errors in Controlled-Phase Gates due to Spectator Qubits
S. Krinner, S. Lazar, A. Remm +7
A major challenge in operating multi-qubit quantum processors is to mitigate multi-qubit coherent errors. For superconducting circuits, besides crosstalk originating from imperfect…
Improving the Performance of Deep Quantum Optimization Algorithms with Continuous Gate Sets
Nathan Lacroix, Christoph Hellings, Christian Kraglund Andersen +9
Variational quantum algorithms are believed to be promising for solving computationally hard problems and are often comprised of repeated layers of quantum gates. An example thereo…
Repeated Quantum Error Detection in a Surface Code
Christian Kraglund Andersen, Ants Remm, Stefania Lazar +6
The realization of quantum error correction is an essential ingredient for reaching the full potential of fault-tolerant universal quantum computation. Using a range of different s…