Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum Architecture Search via Deep Reinforcement Learning
En-Jui Kuo, Yao-Lung L. Fang, Samuel Yen-Chi Chen·Apr 15, 2021
Recent advances in quantum computing have drawn considerable attention to building realistic application for and using quantum computers. However, designing a suitable quantum circuit architecture requires expert knowledge. For example, it is non-tri...
A quantum convolutional neural network on NISQ devices
Shijie Wei, Yanhu Chen, Zeng-rong Zhou +1 more·Apr 14, 2021
Quantum machine learning is one of the most promising applications of quantum computing in the noisy intermediate-scale quantum (NISQ) era. We propose a quantum convolutional neural network(QCNN) inspired by convolutional neural networks (CNN), which...
Error rate reduction of single-qubit gates via noise-aware decomposition into native gates
Thomas J. Maldonado, Johannes Flick, Stefan Krastanov +1 more·Apr 14, 2021
In the current era of Noisy Intermediate-Scale Quantum (NISQ) technology, the practical use of quantum computers remains inhibited by our inability to aptly decouple qubits from their environment to mitigate computational errors. In this paper, we in...
A Quantum Circuit Obfuscation Methodology for Security and Privacy
A. Suresh, Abdullah Ash-Saki, M. Alam +2 more·Apr 13, 2021
Optimization of quantum circuits using an efficient compiler is key to its success for NISQ computers. Several 3rd party compilers are evolving to offer improved performance for large quantum circuits. These 3rd parties, or just a certain release of ...
Universal quantum computation via quantum controlled classical operations
Sebastian Horvat, Xiaoqin Gao, Borivoje Daki'c·Apr 13, 2021
A universal set of gates for (classical or quantum) computation is a set of gates that can be used to approximate any other operation. It is well known that a universal set for classical computation augmented with the Hadamard gate results in univers...
Suppressing Coherent Two-Qubit Errors via Dynamical Decoupling
J. Qiu, Yuxuan Zhou, Changkang Hu +21 more·Apr 6, 2021
Scalable quantum information processing requires the ability to tune multi-qubit interactions. This makes the precise manipulation of quantum states particularly difficult for multi-qubit interactions because tunability unavoidably introduces sensiti...
Hybrid light-matter networks of Majorana zero modes
L. Contamin, M. Delbecq, B. Douçot +2 more·Mar 30, 2021
Topological excitations, such as Majorana zero modes, are a promising route for encoding quantum information. Topologically protected gates of Majorana qubits, based on their braiding, will require some form of network. Here, we propose to build such...
ZX-Calculus and Extended Wolfram Model Systems II: Fast Diagrammatic Reasoning with an Application to Quantum Circuit Simplification
Jonathan Gorard, Manojna Namuduri, X. Arsiwalla·Mar 29, 2021
This article presents a novel algorithmic methodology for performing automated diagrammatic deductions over combinatorial structures, using a combination of modified equational theorem-proving techniques and the extended Wolfram model hypergraph rewr...
Hardware Efficient Quantum Search Algorithm
Ji Liu, Huiyang Zhou·Mar 26, 2021
Quantum computing has noteworthy speedup over classical computing by taking advantage of quantum parallelism, i.e., the superposition of states. In particular, quantum search is widely used in various computationally hard problems. Grover's search al...
Quantum variational optimization: The role of entanglement and problem hardness
Pablo D'iez-Valle, D. Porras, J. Garc'ia-Ripoll·Mar 26, 2021
Quantum variational optimization has been posed as an alternative to solve optimization problems faster and at a larger scale than what classical methods allow. In this paper we study systematically the role of entanglement, the structure of the vari...
Demonstration of Shor’s factoring algorithm for N \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$=$$\end{document}= 2
Unathi Skosana, M. Tame·Mar 25, 2021
We report a proof-of-concept demonstration of a quantum order-finding algorithm for factoring the integer 21. Our demonstration involves the use of a compiled version of the quantum phase estimation routine, and builds upon a previous demonstration. ...
Classical simulation of quantum circuits using a multiqubit Bloch vector representation of density matrices
Qunsheng Huang, C. Mendl·Mar 25, 2021
In the Bloch sphere picture, one finds the coefficients for expanding a single-qubit density operator in terms of the identity and Pauli matrices. A generalization to $n$ qubits via tensor products represents a density operator by a real vector of le...
Preparing Bethe Ansatz Eigenstates on a Quantum Computer
J. V. Van Dyke, George S. Barron, N. Mayhall +2 more·Mar 24, 2021
Several quantum many-body models in one dimension possess exact solutions via the Bethe ansatz method, which has been highly successful for understanding their behavior. Nevertheless, there remain physical properties of such models for which analytic...
A staggered gauge-invariant quantum cellular automaton for both the Kogut-Susskind Schwinger model and the Dirac equation
Kevissen Sellapillay, P. Arrighi, G. Molfetta·Mar 24, 2021
We build a quantum cellular automaton (QCA) which coincides with 1+1 QED on its known continuum limits. It consists in a circuit of unitary gates driving the evolution of particles on a one dimensional lattice, and having them interact with the gauge...
Graph-state representation of the toric code
Pengcheng Liao, D. Feder·Mar 23, 2021
Given their potential for fault-tolerant operations, topological quantum states are currently the focus of intense activity. Of particular interest are topological quantum error correction codes, such as the surface and planar stabilizer codes that a...
Variational quantum compiling with double Q-learning
Zhimin He, Lvzhou Li, Shenggen Zheng +2 more·Mar 22, 2021
Quantum compiling aims to construct a quantum circuit V by quantum gates drawn from a native gate alphabet, which is functionally equivalent to the target unitary U. It is a crucial stage for the running of quantum algorithms on noisy intermediate-sc...
Lorentz quantum computer
Wenhao He, Zhenduo Wang, Biao Wu·Mar 18, 2021
A theoretical model of computation is proposed based on Lorentz quantum mechanics. Besides the standard qubits, this model has an additional bit, which we call hyperbolic bit (or hybit in short). A set of basic logical gates are constructed and their...
Strong parametric dispersive shifts in a statically decoupled two-qubit cavity QED system
T. Noh, Zhihao Xiao, K. Cicak +8 more·Mar 16, 2021
Qubits in cavity quantum electrodynamic (QED) architectures are often operated in the dispersive regime, in which the operating frequency of the cavity depends on the energy state of the qubit, and vice versa. The ability to tune these dispersive shi...
Analytic Filter-Function Derivatives for Quantum Optimal Control
Isabel Nha Minh Le, J. Teske, Tobias Hangleiter +2 more·Mar 16, 2021
Auto-correlated noise appears in many solid state qubit systems and hence needs to be taken into account when developing gate operations for quantum information processing. However, explicitly simulating this kind of noise is often less efficient than ...
Application of the Diamond Gate in Quantum Fourier Transformations and Quantum Machine Learning
E. Bahnsen, S. E. Rasmussen, N. Loft +1 more·Mar 15, 2021
As we are approaching actual application of quantum technology, it is essential to exploit the current quantum resources in the best possible way. With this in mind, it might not be beneficial to use the usual standard gate sets, inspired from classi...