Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Tunable Planar Josephson Junctions Driven by Time-Dependent Spin-Orbit Coupling
D. Monroe, M. Alidoust, I. Žutić·Aug 16, 2022
Integrating conventional superconductors with common III-V semiconductors provides a versatile platform to implement tunable Josephson junctions (JJs) and their applications. We propose that with gate-controlled time-dependent spin-orbit coupling, it...
Measuring incompatibility and clustering quantum observables with a quantum switch
Ni Gao, Dantong Li, Anchit Mishra +3 more·Aug 12, 2022
The existence of incompatible observables is a cornerstone of quantum mechanics and a valuable resource in quantum technologies. Here we introduce a measure of incompatibility, called the mutual eigenspace disturbance (MED), which quantifies the amou...
Simulation of Interaction-Induced Chiral Topological Dynamics on a Digital Quantum Computer.
Jin Ming Koh, Tommy Tai, Ching Hua Lee·Jul 28, 2022
Chiral edge states are highly sought after as paradigmatic topological states relevant to both quantum information processing and dissipationless electron transport. Using superconducting transmon-based quantum computers, we demonstrate chiral topolo...
Enhancing quantum exchanges between two oscillators
Q. Ansel, A. Chepelianskii, J. Lages·Jul 22, 2022
We explore the extent to which two quantum oscillators can exchange their quantum states efficiently through a three-level system which can be spin levels of colored centers in solids. High transition probabilities are obtained using Hamiltonian engi...
Limits to Quantum Gate Fidelity from Near-Field Thermal and Vacuum Fluctuations
Wenbo Sun, S. Bharadwaj, Li‐Ping Yang +5 more·Jul 19, 2022
High-fidelity quantum gate operations are essential for achieving scalable quantum circuits. In spin qubit quantum computing systems, metallic gates and antennas which are necessary for qubit operation, initialization, and readout, also cause detrime...
Reminiscence of Classical Chaos in Driven Transmons
Joachim Cohen, A. Petrescu, R. Shillito +1 more·Jul 19, 2022
Transmon qubits are ubiquitously used in superconducting quantum information processor architectures. Strong drives are required to realize fast, high-fidelity, gates and measurements, including parametrically activated processes. Here, we show that ...
Control and mitigation of microwave crosstalk effect with superconducting qubits
Ruixia Wang, Peng Zhao, Yirong Jin +1 more·Jul 18, 2022
Improving gate performance is vital for scalable quantum computing. Universal quantum computing also requires gate fidelity to reach a high level. For a superconducting quantum processor, which operates in the microwave band, the single-qubit gates a...
Quantum Noise-Induced Reservoir Computing
T. Kubota, Yudai Suzuki, Shumpei Kobayashi +3 more·Jul 16, 2022
Quantum computing has been moving from a theoretical phase to practical one, presenting daunting challenges in implementing physical qubits, which are subjected to noises from the surrounding environment. These quantum noises are ubiquitous in quantu...
Q-BEEP: Quantum Bayesian Error Mitigation Employing Poisson Modeling over the Hamming Spectrum
S. Stein, N. Wiebe, Yufei Ding +2 more·Jul 14, 2022
Quantum computing technology has grown rapidly in recent years, with new technologies being explored, error rates being reduced, and quantum processors' qubit capacity growing. However, near-term quantum algorithms are still unable to be induced with...
A randomized benchmarking suite for mid-circuit measurements
L. Govia, P. Jurcevic, C. J. Wood +3 more·Jul 11, 2022
Mid-circuit measurements are a key component in many quantum information computing protocols, including quantum error correction, fault-tolerant logical operations, and measurement based quantum computing. As such, techniques to quickly and efficient...
Long-distance coupling of spin qubits via topological magnons
Bence Het'enyi, A. Mook, J. Klinovaja +1 more·Jul 4, 2022
We consider two distant spin qubits in quantum dots, both coupled to a two-dimensional topological ferromagnet hosting chiral magnon edge states at the boundary. The chiral magnon is used to mediate entanglement between the spin qubits, realizing a f...
Localization Detection Based on Quantum Dynamics
K. Kudo·Jun 18, 2022
Detecting many-body localization (MBL) typically requires the calculation of high-energy eigenstates using numerical approaches. This study investigates methods that assume the use of a quantum device to detect disorder-induced localization. Numerica...
Spectral analysis for noise diagnostics and filter-based digital error mitigation
Enrico Fontana, I. Rungger, Ross Duncan +1 more·Jun 17, 2022
We investigate the effects of noise on parameterised quantum circuits using spectral analysis and classical signal processing tools. For different noise models, we quantify the additional, higher frequency modes in the output signal caused by device ...
Bayesian learning of parameterised quantum circuits
Samuel Duffield, Marcello Benedetti, Matthias Rosenkranz·Jun 15, 2022
Currently available quantum computers suffer from constraints including hardware noise and a limited number of qubits. As such, variational quantum algorithms that utilise a classical optimiser in order to train a parameterised quantum circuit have d...
Synthesis of and compilation with time-optimal multi-qubit gates
Pascal Bassler, Matthias Zipper, C. Cedzich +4 more·Jun 13, 2022
We develop a method to synthesize a class of entangling multi-qubit gates for a quantum computing platform with fixed Ising-type interaction with all-to-all connectivity. The only requirement on the flexibility of the interaction is that it can be sw...
Using copies can improve precision in continuous-time quantum computing
Jemma Bennett, A. Callison, Tom O'Leary +3 more·Jun 6, 2022
In the quantum optimisation setting, we build on a scheme introduced by Young et al (2013 Phys. Rev. A 88 062314), where physical qubits in multiple copies of a problem encoded into an Ising spin Hamiltonian are linked together to increase the logica...
Hard superconducting gap in germanium
A. Tosato, V. Levajac, Ji-Yin Wang +9 more·Jun 1, 2022
The co-integration of spin, superconducting, and topological systems is emerging as an exciting pathway for scalable and high-fidelity quantum information technology. High-mobility planar germanium is a front-runner semiconductor for building quantum...
Cavity-Based Reservoir Engineering for Floquet-Engineered Superconducting Circuits.
F. Petiziol, A. Eckardt·May 31, 2022
Considering the example of superconducting circuits, we show how Floquet engineering can be combined with reservoir engineering for the controlled preparation of target states. Floquet engineering refers to the control of a quantum system by means of...
On-chip spin-photon entanglement based on photon-scattering of a quantum dot
M. L. Chan, Alexey Tiranov, M. H. Appel +7 more·May 25, 2022
The realization of on-chip quantum interfaces between flying photons and solid-state spins is a key building block for quantum-information processors, enabling, e.g., distributed quantum computing, where remote quantum registers are interconnected by...
Entanglement and quantum correlation measures for quantum multipartite mixed states
Arthur Vesperini, Ghofrane Bel-Hadj-Aissa, R. Franzosi·May 14, 2022
Entanglement, and quantum correlation, are precious resources for quantum technologies implementation based on quantum information science, such as quantum communication, quantum computing, and quantum interferometry. Nevertheless, to our best knowle...