Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,530 papers in 12 months (-3% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum Reservoir Computing for Speckle Disorder Potentials
Pere Mujal·Jan 26, 2022
Quantum reservoir computing is a machine learning approach designed to exploit the dynamics of quantum systems with memory to process information. As an advantage, it presents the possibility to benefit from the quantum resources provided by the rese...
Orienteering with One Endomorphism
Sarah Arpin, Mingjie Chen, K. Lauter +3 more·Jan 26, 2022
In supersingular isogeny-based cryptography, the path-finding problem reduces to the endomorphism ring problem. Can path-finding be reduced to knowing just one endomorphism? It is known that a small degree endomorphism enables polynomial-time path-fi...
Implementation of quantum compression on IBM quantum computers
Matej Pivoluska, Martin Plesch·Jan 26, 2022
Advances in development of quantum computing processors brought ample opportunities to test the performance of various quantum algorithms with practical implementations. In this paper we report on implementations of quantum compression algorithm that...
Learning noise via dynamical decoupling of entangled qubits
T. McCourt, C. Neill, Kenny Lee +9 more·Jan 26, 2022
Noise in entangled quantum systems is difficult to characterize due to many-body effects involving multiple degrees of freedom. This noise poses a challenge to quantum computing, where two-qubit gate performance is critical. Here, we develop and appl...
Efficient quantum readout-error mitigation for sparse measurement outcomes of near-term quantum devices
Bo-Jhang Yang, Rudy Raymond, Shumpei Uno·Jan 26, 2022
The readout error on near-term quantum devices is one of the dominant noise factors, which can be mitigated by classical postprocessing called quantum readout error mitigation (QREM). The standard QREM applies the inverse of noise calibration matrix ...
Basic Quantum Algorithms
Renato Portugal·Jan 25, 2022
Quantum computing is evolving so rapidly that it forces us to revisit, rewrite, and update the foundations of the theory. \emph{Basic Quantum Algorithms} revisits the earliest quantum algorithms. The journey began in 1985 with Deutsch attempting to e...
Efficiently improving the performance of noisy quantum computers
Samuele Ferracin, A. Hashim, J. Ville +7 more·Jan 25, 2022
Using near-term quantum computers to achieve a quantum advantage requires efficient strategies to improve the performance of the noisy quantum devices presently available. We develop and experimentally validate two efficient error mitigation protocol...
A Hybrid Quantum-Classical Algorithm for Robust Fitting
Anh-Dzung Doan, M. Sasdelli, D. Suter +1 more·Jan 25, 2022
Fitting geometric models onto outlier contaminated data is provably intractable. Many computer vision systems rely on random sampling heuristics to solve robust fitting, which do not provide optimality guarantees and error bounds. It is therefore cri...
Quantum Anomaly Detection with a Spin Processor in Diamond
Zihua Chai, Ying Liu, Mengqi Wang +5 more·Jan 25, 2022
In the processing of quantum computation, analyzing and learning the pattern of the quantum data are essential for many tasks. Quantum machine learning algorithms cannot only deal with the quantum states generated in the preceding quantum procedures,...
Generating symmetry-protected long-range entanglement
S. Dutta, S. Kuhr, N. Cooper·Jan 25, 2022
Entanglement between spatially distant qubits is perhaps the most counterintuitive and vital resource for distributed quantum computing. However, despite a few special cases, there is no known general procedure to maximally entangle two distant parts...
Entanglement Purification and Protection in a Superconducting Quantum Network.
Haoxiong Yan, Y. Zhong, Hung-Shen Chang +7 more·Jan 25, 2022
High-fidelity quantum entanglement is a key resource for quantum communication and distributed quantum computing, enabling quantum state teleportation, dense coding, and quantum encryption. Any sources of decoherence in the communication channel, how...
Quantum density estimation with density matrices: Application to quantum anomaly detection
Diego H. Useche, Oscar A. Bustos-Brinez, Joseph A. Gallego-Mejia +1 more·Jan 24, 2022
Density estimation is a central task in statistics and machine learning. This problem aims to determine the underlying probability density function that best aligns with an observed data set. Some of its applications include statistical inference, un...
Probabilistic error cancellation with sparse Pauli–Lindblad models on noisy quantum processors
Ewout van den Berg, Z. Minev, A. Kandala +1 more·Jan 24, 2022
Noise in quantum computers can result in biased estimates of physical observables. Accurate bias-free estimates can be obtained using probabilistic error cancellation, an error-mitigation technique that effectively inverts well-characterized noise ch...
Fundamentals of Quantum Fourier Optics
Mohammad Rezai, J. Salehi·Jan 24, 2022
All-quantum signal processing techniques are at the core of the successful advancement of most information-based quantum technologies. This article develops coherent and comprehensive methodologies and mathematical models to describe Fourier optical ...
Music Composition Using Quantum Annealing
A. Arya, Ludmila A. S. Botelho, Fabiola Canete +2 more·Jan 24, 2022
With the emergence of quantum computers, a new field of algorithmic music composition has been initiated. The vast majority of previous work focuses on music generation using gate-based quantum computers. An alternative model of computation is adiaba...
Reducing Circuit Depth in Adaptive Variational Quantum Algorithms via Effective Hamiltonian Theories.
Jie Liu, Zhenyu Li, Jinlong Yang·Jan 23, 2022
The electronic structure is an anticipated application for quantum computers. However, quantum circuits required to represent the highly entangled electronic wave functions within the variational quantum eigensolver (VQE) framework are far beyond the...
The Effect of the Width of the Incident Pulse to the Dielectric Transition Layer in the Scattering of an Electromagnetic Pulse—A Qubit Lattice Algorithm Simulation
G. Vahala, L. Vahala, Abhay K. Ram null +1 more·Jan 23, 2022
The effect of the thickness of the dielectric boundary layer that connects a material of refractive index $n_1$ to another of index $n_2$ is considered for the propagation of an electromagnetic pulse. For very thin boundary layer the scattering prope...
Dual-Frequency Quantum Phase Estimation Mitigates the Spectral Leakage of Quantum Algorithms
Yifeng Xiong, S. Ng, G. Long +1 more·Jan 23, 2022
Quantum phase estimation is an important component in diverse quantum algorithms. However, it suffers from spectral leakage, when the reciprocal of the record length is not an integer multiple of the unknown phase, which incurs an accuracy degradatio...
Quantum Expectation Transformers for Cost Analysis
Martin Avanzini, G. Moser, Romain Péchoux +2 more·Jan 23, 2022
We introduce a new kind of expectation transformer for a mixed classical-quantum programming language. Our semantic approach relies on a new notion of a cost structure, which we introduce and which can be seen as a specialisation of the Kegelspitzen ...
Amplitude Ratios and Neural Network Quantum States
Vojtěch Havlíček·Jan 22, 2022
Neural Network Quantum States (NQS) represent quantum wavefunctions by artificial neural networks. Here we study the wavefunction access provided by NQS defined in [Science, 355, 6325, pp. 602-606 (2017)] and relate it to results from distribution te...