Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Application of quantum machine learning using the quantum kernel algorithm on high energy physics analysis at the LHC
S. Wu, Shaojun Sun, W. Guan +20 more·Apr 11, 2021
Quantum machine learning could possibly become a valuable alternative to classical machine learning for applications in High Energy Physics by offering computational speed-ups. In this study, we employ a support vector machine with a quantum kernel e...
A quantum strategy to compute the jet quenching parameter q^\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hat{q}$$\
J. Barata, C. Salgado·Apr 10, 2021
Jet quenching, the modification of the properties of a QCD jet when the parton cascade takes place inside a medium, is an intrinsically quantum process, where color coherence effects play an essential role. Despite a very significant progress in the ...
Fundamental thresholds of realistic quantum error correction circuits from classical spin models
D. Vodola, M. Rispler, Seyong Kim +1 more·Apr 10, 2021
Mapping the decoding of quantum error correcting (QEC) codes to classical disordered statistical mechanics models allows one to determine critical error thresholds of QEC codes under phenomenological noise models. Here, we extend this mapping to admi...
Rate compatible reconciliation for continuous-variable quantum key distribution using Raptor-like LDPC codes
Chao Zhou, Xiangyu Wang, Zhiguo Zhang +3 more·Apr 8, 2021
In the practical continuous-variable quantum key distribution (CV-QKD) system, the postprocessing process, particularly the error correction part, significantly impacts the system performance. Multi-edge type low-density parity-check (MET-LDPC) codes...
GPU-accelerated simulations of quantum annealing and the quantum approximate optimization algorithm
D. Willsch, M. Willsch, F. Jin +2 more·Apr 7, 2021
We study large-scale applications using a GPU-accelerated version of the massively parallel J\"ulich universal quantum computer simulator (JUQCS--G). First, we benchmark JUWELS Booster, a GPU cluster with 3744 NVIDIA A100 Tensor Core GPUs. Then, we u...
Experimental quantum learning of a spectral decomposition
M. Geller, Zoe Holmes, Patrick J. Coles +1 more·Apr 7, 2021
Currently available quantum hardware allows for small scale implementations of quantum machine learning algorithms. Such experiments aid the search for applications of quantum computers by benchmarking the near-term feasibility of candidate algorithm...
A systematic variational approach to band theory in a quantum computer
Kyle Sherbert, F. Cerasoli, M. Buongiorno Nardelli·Apr 7, 2021
Quantum computers promise to revolutionize our ability to simulate molecules, and cloud-based hardware is becoming increasingly accessible to a wide body of researchers. Algorithms such as Quantum Phase Estimation and the Variational Quantum Eigensol...
Quantum algorithms for transport coefficients in gauge theories
T. Cohen, Henry Lamm, S. Lawrence +1 more·Apr 5, 2021
In the future, ab initio quantum simulations of heavy ion collisions may become possible with large-scale fault-tolerant quantum computers. We propose a quantum algorithm for studying these collisions by looking at a class of observables requiring dr...
Fast-forwarding with NISQ processors without feedback loop
K. H. Lim, T. Haug, L. Kwek +1 more·Apr 5, 2021
Simulating quantum dynamics is expected to be performed more easily on a quantum computer than on a classical computer. However, the currently available quantum devices lack the capability to implement fault-tolerant quantum algorithms for quantum si...
Risk-sensitive optimization for robust quantum controls
Xiaozhen Ge, R. Wu·Apr 3, 2021
Highly accurate and robust control of quantum operations is vital for the realization of error-correctible quantum computation. In this paper, we show that the robustness of high-precision controls can be remarkably enhanced through sampling-based st...
Quantum computing critical exponents
Henrik Dreyer, M. Bejan, Etienne Granet·Apr 2, 2021
We show that the Variational Quantum-Classical Simulation algorithm admits a finite circuit depth scaling collapse when targeting the critical point of the transverse field Ising chain. The order parameter only collapses on one side of the transition...
Fixed Depth Hamiltonian Simulation via Cartan Decomposition.
Efekan Kökcü, Thomas Steckmann, Yan Wang +3 more·Apr 1, 2021
Simulating quantum dynamics on classical computers is challenging for large systems due to the significant memory requirements. Simulation on quantum computers is a promising alternative, but fully optimizing quantum circuits to minimize limited quan...
Learning to Measure: Adaptive Informationally Complete Generalized Measurements for Quantum Algorithms
Guillermo García-Pérez, M. Rossi, Boris Sokolov +5 more·Apr 1, 2021
Many prominent quantum computing algorithms with applications in fields such as chemistry and materials science require a large number of measurements, which represents an important roadblock for future real-world use cases. We introduce a novel appr...
Logical abstractions for noisy variational Quantum algorithm simulation
Yipeng Huang, Steven Holtzen, T. Millstein +2 more·Mar 31, 2021
Due to the unreliability and limited capacity of existing quantum computer prototypes, quantum circuit simulation continues to be a vital tool for validating next generation quantum computers and for studying variational quantum algorithms, which are...
Computing Shor’s algorithmic steps with interference patterns of classical light
Wen Wang, Ziyang You, Shuangpeng Wang +2 more·Mar 30, 2021
When considered as orthogonal bases in distinct vector spaces, the unit vectors of polarization directions and the Laguerre–Gaussian modes of polarization amplitude are inseparable, constituting a so-called classical entangled light beam. Equating th...
Quantum Algorithm for Time-Dependent Hamiltonian Simulation by Permutation Expansion
Yi-Hsiang Chen, A. Kalev, I. Hen·Mar 29, 2021
We present a quantum algorithm for the dynamical simulation of time-dependent Hamiltonians. Our method involves expanding the interaction-picture Hamiltonian as a sum of generalized permutations, which leads to an integral-free Dyson series of the ti...
Gutzwiller wave function on a digital quantum computer
Bruno Murta, J. Fern'andez-Rossier·Mar 29, 2021
The determination of the ground state of quantum many-body systems via digital quantum computers rests upon the initialization of a sufficiently educated guess. This requirement becomes more stringent the greater the system. Preparing physically-moti...
Topological-Graph Dependencies and Scaling Properties of a Heuristic Qubit-Assignment Algorithm
M. Steinberg, Sebastian Feld, C. G. Almudéver +2 more·Mar 29, 2021
The qubit-mapping problem aims to assign and route qubits of a quantum circuit onto an noisy intermediate-scale quantum (NISQ) device in an optimized fashion, with respect to some cost function. Finding an optimal solution to this problem is known to...
Superconducting circuit architecture for digital-analog quantum computing
Jing Yu, J. C. Retamal, M. Sanz +2 more·Mar 29, 2021
We propose a superconducting circuit architecture suitable for digital-analog quantum computing (DAQC) based on an enhanced NISQ family of nearest-neighbor interactions. DAQC makes a smart use of digital steps (single qubit rotations) and analog bloc...
Embedding Overhead Scaling of Optimization Problems in Quantum Annealing
M. Könz, W. Lechner, H. Katzgraber +1 more·Mar 29, 2021
In order to treat all-to-all connected quadratic binary optimization problems (QUBO) with hardware quantum annealers, an embedding of the original problem is required due to the sparsity of the hardware's topology. Embedding fully-connected graphs - ...