Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Low-cost noise reduction for Clifford circuits
Nicolas Delfosse, Edwin Tham·Jul 9, 2024
We propose a Clifford noise reduction (CliNR) scheme that provides a reduction of the logical error rate of Clifford circuit with lower overhead than error correction and without the exponential sampling overhead of error mitigation. CliNR implements...
Heisenberg-limited Bayesian phase estimation with low-depth digital quantum circuits
Su Direkci, Ran Finkelstein, Manuel Endres +1 more·Jul 8, 2024
Optimal phase estimation protocols require complex state preparation and readout schemes, generally unavailable or unscalable in many quantum platforms. We develop and analyze a scheme that achieves near-optimal precision up to a constant overhead fo...
Noise-tolerant public-key quantum money from a classical oracle
P. Yuen·Jul 8, 2024
Quantum money is the task of verifying the validity of banknotes while ensuring that they cannot be counterfeited. Public-key quantum money allows anyone to perform verification, while the private-key setting restricts the ability to verify to banks,...
Simulation of temperature-dependent quantum gates in silicon quantum dots with frequency shifts
Yudai Sato, Takayuki Kawahara·Jul 7, 2024
To achieve quantum computing using semiconductor spin qubits, the spin qubits must be precisely controlled. However, unexpected noise limits this precision and prevents the implementation of error correction codes. Specifically, frequency shifts have...
Kalman filter enhanced Adversarial Bayesian optimization for active sampling in inelastic neutron scattering
Nihad Abuawwad, Yixuan Zhang, Samir Lounis +1 more·Jul 5, 2024
Spin waves, or magnons, are fundamental excitations in magnetic materials that provide insights into their dynamic properties and interactions. Magnons are the building blocks of magnonics, which offer promising perspectives for data storage, quantum...
Dynamic thermalization on noisy quantum hardware
Hugo Perrin, Thibault Scoquart, Andrei I. Pavlov +1 more·Jul 5, 2024
Emulating thermal observables on a digital quantum computer is essential for quantum simulation of many-body physics. However, thermalization typically requires a large system size due to incorporating a thermal bath, whilst limited resources of near...
Limitations to Dynamical Error Suppression and Gate-Error Virtualization from Temporally Correlated Nonclassical Noise
Michiel Burgelman, Nattaphong Wonglakhon, D. N. Bernal-Garc'ia +2 more·Jul 5, 2024
Realistic multiqubit noise processes often result in error mechanisms that are not captured by the probabilistic Markovian error models commonly employed in circuit-level analyses of quantum fault tolerance. By working within an open-quantum system H...
Qudit Dynamical Decoupling on a Superconducting Quantum Processor.
Vinay Tripathi, Noah Goss, A. Vezvaee +3 more·Jul 5, 2024
Multilevel qudit systems are increasingly being explored as alternatives to traditional qubit systems due to their denser information storage and processing potential. However, qudits are more susceptible to decoherence than qubits due to increased l...
Discovering Local Hidden-Variable Models for Arbitrary Multipartite Entangled States and Arbitrary Measurements
Nick von Selzam, Florian Marquardt·Jul 5, 2024
Measurement correlations in quantum systems can exhibit nonlocal behavior, a fundamental aspect of quantum mechanics with applications such as device-independent quantum information processing. However, it is in general not known which states are loc...
Overdispersion in Gate Tomography: Experiments and Continuous, Two-Scale Random Walk Model on the Bloch Sphere
Wolfgang Nowak, Tim Bruennette, Merel A. Schalkers +1 more·Jul 4, 2024
Noisy intermediate-scale quantum computers (NISQ) are computing hardware in their childhood, but they are showing high promise and growing quickly. They are based on so-called qubits, which are the quantum equivalents of bits. Any given qubit state r...
Evaluation of phase shifts for nonrelativistic elastic scattering using quantum computers
F. Turro, Kyle A. Wendt, S. Quaglioni +2 more·Jul 4, 2024
Simulations of scattering processes are essential in understanding the physics of our universe. Computing relevant scattering quantities from ab initio methods is extremely difficult on classical devices because of the substantial computational resou...
Direct Estimation of the Density of States for Fermionic Systems
Matthew L. Goh, Bálint Koczor·Jul 3, 2024
Simulating time evolution is one of the most natural applications of quantum computers and is thus one of the most promising prospects for achieving practical quantum advantage. Here, we develop quantum algorithms to extract thermodynamic properties ...
Qudit-native measurement protocol for dynamical correlations using Hadamard tests
Pavel P. Popov, Kevin T. Geier, Valentin Kasper +2 more·Jul 3, 2024
Dynamical correlations reveal important out-of-equilibrium properties of the underlying quantum many-body system, yet they are notoriously difficult to measure in experiments. While measurement protocols for dynamical correlations based on Hadamard t...
The sudden death of quantum advantage in correlation generations
Weixiao Sun, Fuchuan Wei, Yuguo Shao +1 more·Jul 3, 2024
As quantum error corrections still cannot be realized physically, quantum noise is the most profound obstacle to the implementations of large-scale quantum algorithms or quantum schemes. It has been well-known that if a quantum computer suffers from ...
Hardware-efficient variational quantum algorithm in a trapped-ion quantum computer
Jingze Zhuang, Y. Wu, L. Duan·Jul 3, 2024
We study a hardware-efficient variational quantum algorithm ansatz tailored for the trapped-ion quantum simulator, HEA-TI. We leverage programmable single-qubit rotations and global spin-spin interactions among all ions, reducing the dependence on re...
A Traveling-Wave Parametric Amplifier and Converter
M. Malnou, B. T. Miller, J. A. Estrada +5 more·Jun 27, 2024
High-fidelity qubit measurement is a critical element of all quantum computing architectures. In superconducting systems, qubits are typically measured by probing a readout resonator with a weak microwave tone that must be amplified before reaching t...
Multivariate bicycle codes
L. Voss, S. Xian, Tobias Haug +1 more·Jun 27, 2024
Quantum error correction suppresses noise in quantum systems to allow for high-precision computations. In this work, we introduce Multivariate Bicycle (MB) Quantum Low-Density Parity-Check (QLDPC) codes, via an extension of the framework developed by...
QOS: A Quantum Operating System
Emmanouil Giortamis, Francisco Romão, Nathaniel Tornow +1 more·Jun 27, 2024
Quantum computers face challenges due to hardware constraints, noise errors, and heterogeneity, and face fundamental design tradeoffs between key performance metrics such as \textit{quantum fidelity} and system utilization. This substantially complic...
JuliVQC: an Efficient Variational Quantum Circuit Simulator for Near-Term Quantum Algorithms
Wei-You Liao, Xiang Wang, Xiao-Yue Xu +4 more·Jun 27, 2024
We introduce JuliVQC: a light-weight, yet extremely efficient variational quantum circuit simulator. JuliVQC is part of an effort for classical simulation of the \textit{Zuchongzhi} quantum processors, where it is extensively used to characterize the...
Resilience of the surface code to error bursts
Shi Jie Samuel Tan, Christopher A. Pattison, M. McEwen +1 more·Jun 27, 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 ionizing radi...