Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Topological error correction with a Gaussian cluster state
S. Hao, Meihong Wang, Dong Wang +1 more·May 13, 2021
Shuhong Hao, Meihong Wang, Dong Wang, and Xiaolong Su2,3∗ School of Mathematics and Physics, Anhui University of Technology, Maanshan, 243000, People’s Republic of China State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of ...
Implementing Quantum Finite Automata Algorithms on Noisy Devices
Utku Birkan, Özlem Salehi, Viktor Olejar +2 more·May 13, 2021
Quantum finite automata (QFAs) literature offers an alternative mathematical model for studying quantum systems with finite memory. As a superiority of quantum computing, QFAs have been shown exponentially more succinct on certain problems such as re...
Fast black-box quantum state preparation based on linear combination of unitaries
Shengbin Wang, Zhimin Wang, G. Cui +6 more·May 13, 2021
Black-box quantum state preparation is a fundamental primitive in quantum algorithms. Starting from Grover, a series of techniques have been devised to reduce the complexity. In this work, we propose to perform black-box state preparation using the t...
Numerical hardware-efficient variational quantum simulation of a soliton solution
A. Kardashin, A. Pervishko, J. Biamonte +1 more·May 13, 2021
Implementing variational quantum algorithms with noisy intermediate-scale quantum machines of up to a hundred qubits is nowadays considered as one of the most promising routes towards achieving a quantum practical advantage. In multiqubit circuits, r...
Parity Quantum Optimization: Benchmarks
M. Fellner, K. Ender, R. T. Hoeven +1 more·May 13, 2021
We present benchmarks of the parity transformation for the Quantum Approximate Optimization Algorithm (QAOA). We analyse the gate resources required to implement a single QAOA cycle for real-world scenarios. In particular, we consider random spin mod...
A Graphical Calculus for Lagrangian Relations
Cole Comfort, A. Kissinger·May 13, 2021
Symplectic vector spaces are the phase spaces of linear mechanical systems. The symplectic form describes, for example, the relation between position and momentum as well as current and voltage. The category of linear Lagrangian relations between sym...
Experimental QND measurements of complementarity on two-qubit states with IonQ and IBM Q quantum computers
Nicolas Schwaller, Valeria Vento, C. Galland·May 13, 2021
We report the experimental nondemolition measurement of coherence, predictability and concurrence on a system of two qubits. The quantum circuits proposed by De Melo et al. (Phys Rev Lett 98(25):250501, 2007) are implemented on IBM Q (superconducting...
Anti-Hong-Ou-Mandel interference by coherent perfect absorption of entangled photons
Anton N. Vetlugin, Ruixiang Guo, Cesare Soci +1 more·May 12, 2021
Two-photon interference, known as the Hong-Ou-Mandel effect, has colossal implications for quantum technology. It was observed in 1987 with two photodetectors monitoring outputs of the beamsplitter illuminated by photon pairs: the coincidence rate of...
Gauge-invariant quantum circuits for U (1) and Yang-Mills lattice gauge theories
Giulia Mazzola, Simon V. Mathis, G. Mazzola +1 more·May 12, 2021
Quantum computation represents an emerging framework to solve lattice gauge theories (LGT) with arbitrary gauge groups, a general and long-standing problem in computational physics. While quantum computers may encode LGT using only polynomially incre...
Phase Coherence of Pairs of Cooper Pairs as Quasi-Long-Range Order of Half-Vortex Pairs in a Two-Dimensional Bilayer System.
Fengquan Song, Guang-Ming Zhang·May 12, 2021
It is known that the loss of phase coherence of Cooper pairs in two-dimensional superconductivity corresponds to the unbinding of vortex-antivortex pairs with the quasi-long-range order in the order-parameter phase field, described by the Berezinskii...
Prime number factorization using a spinor Bose–Einstein condensate-inspired topological quantum computer
Emil Génetay Johansen, T. Simula·May 12, 2021
Inspired by non-abelian vortex anyons in spinor Bose–Einstein condensates, we consider the quantum double D(Q8)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \use...
Lattice sieving via quantum random walks
A. Chailloux, Johanna Loyer·May 12, 2021
Lattice-based cryptography is one of the leading proposals for post-quantum cryptography. The Shortest Vector Problem (SVP) is arguably the most important problem for the cryptanalysis of lattice-based cryptography, and many lattice-based schemes hav...
Structural risk minimization for quantum linear classifiers
Casper Gyurik, Dyon van Vreumingen, V. Dunjko·May 12, 2021
Quantum machine learning (QML) models based on parameterized quantum circuits are often highlighted as candidates for quantum computing's near-term “killer application''. However, the understanding of the empirical and generalization performance of t...
Hardware-Efficient Microwave-Activated Tunable Coupling between Superconducting Qubits.
B. Mitchell, R. Naik, A. Morvan +7 more·May 12, 2021
Generating high-fidelity, tunable entanglement between qubits is crucial for realizing gate-based quantum computation. In superconducting circuits, tunable interactions are often implemented using flux-tunable qubits or coupling elements, adding cont...
Maxwell Demon and Einstein–Podolsky–Rosen Steering
M. Hu 胡, X. Hu 胡, Y. Zhang 张·May 12, 2021
Research of Maxwell demon and quantum entanglement is important because of its foundational significance in physics and its potential applications in quantum information. Previous studies on the Maxwell demon have primarily focused on thermodynamics,...
Benchmarking near-term quantum computers via random circuit sampling
Yunchao Liu, M. Otten, Roozbeh Bassirianjahromi +2 more·May 11, 2021
The increasing scale of near-term quantum hardware motivates the need for efficient noise characterization methods, since qubit and gate level techniques cannot capture crosstalk and correlated noise in many qubit systems. While scalable approaches, ...
On Assessing the Quantum Advantage for MaxCut Provided by Quantum Neural Network Ans\"atze
Juneseo Lee·May 11, 2021
In this work we design a class of Ansätze to solve MaxCut on a parameterized quantum circuit (PQC). Gaining inspiration from properties of quantum optimal control landscapes, we consider the presence of optimization traps as a measure of complexity f...
Multi-qubit production in spontaneous parametric down conversion
Phillip Heitert, Finn Buldt, Pascal Bassène +1 more·May 11, 2021
We present a novel yet simple approach to produced multiple entangled photon pairs through spontaneous parametric downconversion. We have developed Gaussian masks to subdivide the pump beam before passing it through a nonlinear medium. In this way, w...
qRobot: A Quantum Computing Approach in Mobile Robot Order Picking and Batching Problem Solver Optimization
Parfait Atchade-Adelomou, Guillermo Alonso-Linaje, J. Albó-Canals +1 more·May 11, 2021
This article aims to bring quantum computing to robotics. A quantum algorithm is developed to minimize the distance traveled in warehouses and distribution centers where order picking is applied. For this, a proof of concept is proposed through a Ras...
Quantum Simulations of the Non-Unitary Time Evolution and Applications to Neutral-Kaon Oscillations
Ying Chen, Yunheng Ma, Shun Zhou·May 11, 2021
In light of recent exciting progress in building up quantum computing facilities based on both optical and cold-atom techniques, the algorithms for quantum simulations of particle-physics systems are in rapid progress. In this paper, we propose an ef...