Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum image denoising with machine learning: a novel approach to improve quantum image processing quality and reliability
Yifan Zhou, Yew Kee Wong, Yan Shing Liang·Feb 18, 2024
Quantum Image Processing (QIP) is a field that aims to utilize the benefits of quantum computing for manipulating and analyzing images. However, QIP faces two challenges: the limitation of qubits and the presence of noise in a quantum machine. In thi...
Leveraging junk information to enhance the quantum error mitigation
Ruixia Wang, Xiaosi Xu, F. Yan +4 more·Feb 16, 2024
Noise in quantum information processing poses a significant obstacle to achieving precise results. Quantum error mitigation techniques are crucial for improving the accuracy of experimental expectation values in this process. In the experiments, it i...
MITS: A Quantum Sorcerer’s Stone for Designing Surface Codes
Avimita Chatterjee, Debarshi Kundu, Swaroop Ghosh·Feb 16, 2024
In the evolving field of quantum computing, optimizing Quantum Error Correction (QEC) parameters is crucial due to the varying types and amounts of physical noise across quantum computers. Traditional simulators use a forward paradigm to derive logic...
Magic Mirror on the Wall, How to Benchmark Quantum Error Correction Codes, Overall?
Avimita Chatterjee, Swaroop Ghosh·Feb 16, 2024
Quantum Error Correction Codes (QECCs) are pivotal in advancing quantum computing by protecting quantum states against the adverse effects of noise and errors. With a variety of QECCs developed, including new developments and modifications of existin...
Linear Depth QFT over IBM Heavy-hex Architecture
Xiangyu Gao, Yuwei Jin, Minghao Guo +2 more·Feb 15, 2024
Compiling a given quantum algorithm into a target hardware architecture is a challenging optimization problem. The compiler must take into consideration the coupling graph of physical qubits and the gate operation dependencies. The existing noise in ...
Quantum Algorithm Exploration using Application-Oriented Performance Benchmarks
Thomas Lubinski, Joshua J. Goings, Karl Mayer +11 more·Feb 14, 2024
The QED-C suite of Application-Oriented Benchmarks provides the ability to gauge performance characteristics of quantum computers as applied to real-world applications. Its benchmark programs sweep over a range of problem sizes and inputs, capturing ...
Bosonic Pauli+: Efficient Simulation of Concatenated Gottesman-Kitaev-Preskill Codes
Florian Hopfmueller, Maxime Tremblay, P. Jean +2 more·Feb 14, 2024
A promising route towards fault-tolerant quantum error correction is the concatenation of a Gottesman-Kitaev-Preskill (GKP) code with a qubit code. Development of such concatenated codes requires simulation tools which realistically model noise, whil...
Beyond unital noise in variational quantum algorithms: noise-induced barren plateaus and limit sets
P. Singkanipa, Daniel A. Lidar·Feb 13, 2024
Variational quantum algorithms (VQAs) hold much promise but face the challenge of exponentially small gradients. Unmitigated, this barren plateau (BP) phenomenon leads to an exponential training overhead for VQAs. Perhaps the most pernicious are nois...
Tensor network noise characterization for near-term quantum computers
Stefano Mangini, Marco Cattaneo, Daniel Cavalcanti +3 more·Feb 13, 2024
Characterization of noise in current near-term quantum devices is of paramount importance to fully use their computational power. However, direct quantum process tomography becomes unfeasible for systems composed of tens of qubits. A promising altern...
Subsystem surface and compass code sensitivities to non-identical infidelity distributions on heavy-hex lattice
Malcolm Carroll, James R. Wootton, Andrew W. Cross·Feb 13, 2024
Logical qubits encoded into a quantum code exhibit improved error rates when the physical error rates are sufficiently low, below the pseudothreshold. Logical error rates and pseudothresholds can be estimated for specific circuits and noise models, a...
Virtual Channel Purification
Zhenhuan Liu, Xingjian Zhang, Yueyang Fei +1 more·Feb 12, 2024
Quantum error mitigation is a key approach for extracting target state properties on state-of-the-art noisy machines and early fault-tolerant devices. Using the ideas from flag fault tolerance and virtual state purification, we develop the virtual-ch...
Computational complexity of isometric tensor network states
D. Malz, Rahul Trivedi·Feb 12, 2024
We determine the computational power of isometric tensor network states (isoTNS), a variational ansatz originally developed to numerically find and compute properties of gapped ground states and topological states in two dimensions. By mapping 2D iso...
Piecewise Polynomial Tensor Network Quantum Feature Encoding
Mazen Ali, M. Kabel·Feb 12, 2024
This work introduces a novel method for embedding continuous variables into quantum circuits via piecewise polynomial features, utilizing low-rank tensor networks. Our approach, termed Piecewise Polynomial Tensor Network Quantum Feature Encoding (PPT...
Optimized noise-assisted simulation of the Lindblad equation with time-dependent coefficients on a noisy quantum processor
J. D. Guimarães, Antonio Ruiz-Molero, James Lim +3 more·Feb 12, 2024
Noise in quantum devices is generally considered detrimental to computational accuracy. However, the recent proposal of noise-assisted simulation has demonstrated that noise can be an asset in digital quantum simulations of open systems on Noisy Inte...
Full Quantum Process Tomography of a Universal Entangling Gate on an IBM’s Quantum Computer
M. AbuGhanem·Feb 10, 2024
Characterizing quantum dynamics is critical in quantum physics, quantum information science, and computation, where the precision of quantum gates plays a key role. We present a comprehensive experimental analysis of the SQSCZ gate–a novel universal ...
Estimating the Effect of Crosstalk Error on Circuit Fidelity Using Noisy Intermediate-Scale Quantum Devices
Sovanmonynuth Heng, Myeongseong Go, Youngsun Han·Feb 10, 2024
Current advancements in technology have focused the attention of the quantum computing community toward exploring the potential of near-term devices whose computing power surpasses that of classical computers in practical applications. An unresolved ...
Barycentric and pairwise Rényi quantum leakage with application to privacy-utility trade-off
Farhad Farokhi·Feb 9, 2024
Barycentric and pairwise quantum Rényi leakages are proposed as two measures of information leakage for privacy and security analysis in quantum computing and communication systems. These quantities both require minimal assumptions on the eavesdroppe...
Safeguarding Oscillators and Qudits with Distributed Two-Mode Squeezing
Anthony J. Brady, Jing Wu, Quntao Zhuang·Feb 8, 2024
Recent advancements in multi-mode Gottesman-Kitaev-Preskill (GKP) codes have shown great promise in enhancing the protection of both discrete and analog quantum information. This broadened range of protection brings opportunities beyond quantum compu...
Weight-Reduced Stabilizer Codes with Lower Overhead
Eric Sabo, Lane G. Gunderman, Benjamin Ide +2 more·Feb 7, 2024
Stabilizer codes are the most widely studied class of quantum error-correcting codes and form the basis of most proposals for a fault-tolerant quantum computer. A stabilizer code is defined by a set of parity-check operators, which are measured in or...
Continuous-Variable Quantum Key Distribution with key rates far above the PLOB bound
A. Ray, Boris Škorić·Feb 7, 2024
Continuous-Variable Quantum Key Distribution (CVQKD) at large distances has such high noise levels that the error-correcting code must have very low rate. In this regime it becomes feasible to implement random-codebook error correction, which is know...