Papers
Live trends in quantum computing research, updated daily from arXiv.
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31,714
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15,744 papers in 12 months (-37% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Genuine 12-Qubit Entanglement on a Superconducting Quantum Processor.
M. Gong, Ming-Cheng Chen, Yarui Zheng +20 more·Nov 6, 2018
We report the preparation and verification of a genuine 12-qubit entanglement in a superconducting processor. The processor that we designed and fabricated has qubits lying on a 1D chain with relaxation times ranging from 29.6 to 54.6 μs. The fideli...
An artificial neuron implemented on an actual quantum processor
F. Tacchino, C. Macchiavello, D. Gerace +1 more·Nov 6, 2018
Artificial neural networks are the heart of machine learning algorithms and artificial intelligence. Historically, the simplest implementation of an artificial neuron traces back to the classical Rosenblatt’s “perceptron”, but its long term practical...
Impact of qubit connectivity on quantum algorithm performance
Adam Holmes, Adam Holmes, S. Johri +3 more·Nov 6, 2018
Quantum computing hardware is undergoing rapid development from proof-of-principle devices to scalable machines that could eventually challenge classical supercomputers on specific tasks. On platforms with local connectivity, the transition from one-...
Learning robust and high-precision quantum controls
R. Wu, Haijin Ding, Daoyi Dong +1 more·Nov 5, 2018
Robust and high-precision quantum control is extremely important but challenging for the functionalization of scalable quantum computation. In this paper, we show that this hard problem can be translated to a supervised machine learning task by think...
Challenges Implementing non-Abelian SU(2) Quantum Chromodynamics Gauge Links On a Universal Quantum Computer
P. Dreher·Nov 4, 2018
The traditional approach for studying the physics of the strong interactions employs a basic computational construct originally proposed by Wilson in the 1970s. Over the years additional enhancements have been added to this formulation to improve com...
Ancilla-Free Quantum Error Correction Codes for Quantum Metrology.
David Layden, Sisi Zhou, P. Cappellaro +1 more·Nov 4, 2018
Quantum error correction has recently emerged as a tool to enhance quantum sensing under Markovian noise. It works by correcting errors in a sensor while letting a signal imprint on the logical state. This approach typically requires a specialized er...
Computational Assessment of Silicon Quantum Gate Based on Detuning Mechanism for Quantum Computing
Tong Wu, Jing Guo·Nov 2, 2018
Silicon-based quantum computing has the potential advantages of low cost, high integration density, and compatibility with CMOS technologies. The detuning mechanism has been used to experimentally achieve silicon two-qubit quantum gates and programma...
Coarse-grained lattice protein folding on a quantum annealer
Tomás Babej, C. Ing, M. Fingerhuth·Nov 2, 2018
Lattice models have been used extensively over the past thirty years to examine the principles of protein folding and design. These models can be used to determine the conformation of the lowest energy fold out of a large number of possible conformat...
Image Classification Using Quantum Inference on the D-Wave 2X
Nga T. T. Nguyen, Garrett T. Kenyon·Nov 1, 2018
We use a quantum annealing D-Wave 2X computer to obtain solutions to NP-hard sparse coding problems. To reduce the dimensionality of the sparse coding problem to fit on the quantum D-Wave 2X hardware, we passed downsampled MNIST images through a bott...
Quantum complementarity and operator structures
D. Kribs, Jeremy Livick, Mike I. Nelson +2 more·Nov 1, 2018
We establish operator structure identities for quantum channels and their error-correcting and private codes, emphasizing the complementarity relationship between the two perspectives. Relevant structures include correctable and private operator alge...
Parallel Quantum Computing Emulation
B. Cour, S. Lanham, Corey I. Ostrove·Nov 1, 2018
Quantum computers provide a fundamentally new computing paradigm that promises to revolutionize our ability to solve broad classes of problems. Surprisingly, the basic mathematical structures of gate-based quantum computing, such as unitary operation...
Demonstration of a Quantum Circuit Design Methodology for Multiple Regression
Sanchayan Dutta, Adrien Suau, Sagnik Dutta +3 more·Nov 1, 2018
Multiple linear regression, one of the most fundamental supervised learning algorithms, assumes an imperative role in the field of machine learning. In 2009, Harrow et al. [Phys. Rev. Lett. 103, 150502 (2009)] showed that their algorithm could be use...
Good approximate quantum LDPC codes from spacetime circuit Hamiltonians
T. Bohdanowicz, E. Crosson, Chinmay Nirkhe +1 more·Nov 1, 2018
We study approximate quantum low-density parity-check (QLDPC) codes, which are approximate quantum error-correcting codes specified as the ground space of a frustration-free local Hamiltonian, whose terms do not necessarily commute. Such codes genera...
A quantum alternating operator ansatz with hard and soft constraints for lattice protein folding
M. Fingerhuth, T. Babej, C. Ing·Oct 31, 2018
Gate-based universal quantum computers form a rapidly evolving field of quantum computing hardware technology. In previous work, we presented a quantum algorithm for lattice protein folding on a cubic lattice, tailored for quantum annealers. In this ...
Quantum Principal Component Analysis Only Achieves an Exponential Speedup Because of Its State Preparation Assumptions.
Ewin Tang·Oct 31, 2018
A central roadblock to analyzing quantum algorithms on quantum states is the lack of a comparable input model for classical algorithms. Inspired by recent work of the author [E. Tang, STOC 2019.], we introduce such a model, where we assume we can eff...
Quantum sketching protocols for Hamming distance and beyond
J. F. Doriguello, A. Montanaro·Oct 30, 2018
In this work we use the concept of quantum fingerprinting to develop a quantum communication protocol in the simultaneous message passing model that calculates the Hamming distance between two $n$-bit strings up to relative error $\epsilon$. The numb...
Network Community Detection on Small Quantum Computers
Ruslan Shaydulin, Hayato Ushijima-Mwesigwa, Ilya Safro +2 more·Oct 30, 2018
In recent years, a number of quantum computing devices with small numbers of qubits have become available. A hybrid quantum local search (QLS) approach that combines a classical machine and a small quantum device to solve problems of practical size i...
Destabilization of Local Minima in Analog Spin Systems by Correction of Amplitude Heterogeneity.
T. Leleu, Y. Yamamoto, P. McMahon +1 more·Oct 30, 2018
The relaxation of binary spins to analog values has been the subject of much debate in the field of statistical physics, neural networks, and more recently quantum computing, notably because the benefits of using an analog state for finding lower ene...
Quantum advantage in training binary neural networks.
Yidong Liao, Daniel Ebler, Feiyang Liu +1 more·Oct 30, 2018
The performance of a neural network for a given task is largely determined by the initial calibration of the network parameters. Yet, it has been shown that the calibration, also referred to as training, is generally NP-complete. This includes networ...
Semidefinite programming hierarchies for constrained bilinear optimization
M. Berta, Francesco Borderi, Omar Fawzi +1 more·Oct 29, 2018
We give asymptotically converging semidefinite programming hierarchies of outer bounds on bilinear programs of the form Tr[H(D⊗E)]\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usep...