Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
A Jacobi Diagonalization and Anderson Acceleration Algorithm For Variational Quantum Algorithm Parameter Optimization.
R. Parrish, Joseph Iosue, A. Ozaeta +1 more·Apr 5, 2019
The optimization of circuit parameters of variational quantum algorithms such as the variational quantum eigensolver (VQE) or the quantum approximate optimization algorithm (QAOA) is a key challenge for the practical deployment of near-term quantum c...
Measurement-Induced Boolean Dynamics and Controllability for Quantum Networks
Hongsheng Qi, I. Petersen, Guodong Shi·Apr 4, 2019
In this paper, we study dynamical quantum networks which evolve according to Schrodinger equations but subject to sequential local or global quantum measurements. A network of qubits forms a composite quantum system whose state undergoes unitary evol...
Quantum Generative Adversarial Networks for learning and loading random distributions
Christa Zoufal, Aurélien Lucchi, Stefan Woerner·Mar 29, 2019
Quantum algorithms have the potential to outperform their classical counterparts in a variety of tasks. The realization of the advantage often requires the ability to load classical data efficiently into quantum states. However, the best known method...
Sequential minimal optimization for quantum-classical hybrid algorithms
Ken M. Nakanishi, K. Fujii, S. Todo·Mar 28, 2019
We propose a sequential minimal optimization method for quantum-classical hybrid algorithms, which converges faster, is robust against statistical error, and is hyperparameter-free. Specifically, the optimization problem of the parameterized quantum ...
Hybrid classical-quantum linear solver using Noisy Intermediate-Scale Quantum machines
Chih-Chieh Chen, Shiue-yuan Shiau, Ming-Feng Wu +1 more·Mar 26, 2019
We propose a realistic hybrid classical-quantum linear solver to solve systems of linear equations of a specific type, and demonstrate its feasibility with Qiskit on IBM Q systems. This algorithm makes use of quantum random walk that runs in O\docume...
Decoding quantum error correction with Ising model hardware
Joschka Roffe, S. Zohren, D. Horsman +1 more·Mar 25, 2019
Fault tolerant quantum computers will require efficient co-processors for real-time decoding of their adopted quantum error correction protocols. In this work we examine the possibility of using specialised Ising model hardware to perform this decodi...
Track clustering with a quantum annealer for primary vertex reconstruction at hadron colliders
Souvik Das, A. Wildridge, A. Jung·Mar 21, 2019
Clustering of charged particle tracks along the beam axis is the first step in reconstructing the positions of hadronic interactions, also known as primary vertices, at hadron collider experiments. We use a 2036 qubit D-Wave quantum annealer to perfo...
Machine learning methods in quantum computing theory
D. V. Fastovets, Y. Bogdanov, B. Bantysh +1 more·Mar 15, 2019
Classical machine learning theory and theory of quantum computations are among of the most rapidly developing scientific areas in our days. In recent years, researchers investigated if quantum computing can help to improve classical machine learning ...
Channel Decoding with Quantum Approximate Optimization Algorithm
Toshiki Matsumine, T. Koike-Akino, Ye Wang·Mar 6, 2019
Motivated by the recent advancement of quantum processors, we investigate quantum approximate optimization algorithm (QAOA) to employ quasi-maximum-likelihood (ML) decoding of classical channel codes. QAOA is a hybrid quantum-classical variational al...
Entangling spins in double quantum dots and Majorana bound states
Marko J. Ranvci'c, S. Hoffman, C. Schrade +2 more·Feb 26, 2019
We study the coupling between a singlet-triplet qubit realized in a double quantum dot to a topological qubit realized by spatially well-separated Majorana bound states. We demonstrate that the singlet-triplet qubit can be leveraged for readout of th...
Designing metamaterials with quantum annealing and factorization machines
Koki Kitai, Jiang Guo, S. Ju +4 more·Feb 18, 2019
Complexity of materials designed by machine learning is currently limited by the inefficiency of classical computers. We show how quantum annealing can be incorporated into automated materials discovery and conduct a proof-of-principle study on desig...
Smart contracts meet quantum cryptography
Andrea Coladangelo·Feb 14, 2019
We put forward the idea that classical blockchains and smart contracts are potentially useful primitives not only for classical cryptography, but for quantum cryptography as well. Abstractly, a smart contract is a functionality that allows parties to...
Graver Bases via Quantum Annealing with Application to Non-Linear Integer Programs
H. Alghassi, Raouf Dridi, S. Tayur·Feb 12, 2019
We propose a novel hybrid quantum-classical approach to calculate Graver bases, which have the potential to solve a variety of hard linear and non-linear integer programs, as they form a test set (optimality certificate) with very appealing propertie...
Downfolding of many-body Hamiltonians using active-space models: Extension of the sub-system embedding sub-algebras approach to unitary coupled cluster formalisms.
Nicholas P. Bauman, E. Bylaska, S. Krishnamoorthy +6 more·Feb 5, 2019
In this paper, we discuss the extension of the recently introduced subsystem embedding subalgebra coupled cluster (SES-CC) formalism to unitary CC formalisms. In analogy to the standard single-reference SES-CC formalism, its unitary CC extension allo...
QRunes: High-Level Language for Quantum-Classical Hybrid Programming
Zhao-Yun Chen, G. Guo·Jan 24, 2019
Hybrid quantum-classical algorithms have drawn much attention because of their potential to realize the "quantum advantage" in noisy, intermediate-scale quantum (NISQ) devices. Here we introduce QRunes, a cross-platform quantum language for hybrid pr...
Robust implementation of generative modeling with parametrized quantum circuits
Vicente Leyton-Ortega, A. Perdomo-Ortiz, O. Perdomo·Jan 23, 2019
Although the performance of hybrid quantum-classical algorithms is highly dependent on the selection of the classical optimizer and the circuit ansätze (Benedetti et al, npj Quantum Inf 5:45, 2019; Hamilton et al, 2018; Zhu et al, 2018), a robust and...
Quantum-dot single-photon source on a CMOS silicon photonic chip integrated using transfer printing
R. Katsumi, Y. Ota, A. Osada +6 more·Dec 31, 2018
Silicon photonics is a powerful platform for implementing large-scale photonic integrated circuits (PICs), because of its compatibility with mature complementary-metal-oxide-semiconductor (CMOS) technology. Exploiting silicon-based PICs for quantum p...
Methodology for replacing indirect measurements with direct measurements
K. Mitarai, K. Fujii·Dec 31, 2018
In quantum computing, the indirect measurement of unitary operators such as the Hadamard test plays a significant role in many algorithms. However, in certain cases, the indirect measurement can be reduced to the direct measurement, where a quantum s...
An adaptive variational algorithm for exact molecular simulations on a quantum computer
Harper R. Grimsley, S. Economou, Edwin Barnes +1 more·Dec 28, 2018
Quantum simulation of chemical systems is one of the most promising near-term applications of quantum computers. The variational quantum eigensolver, a leading algorithm for molecular simulations on quantum hardware, has a serious limitation in that ...
Variational consistent histories as a hybrid algorithm for quantum foundations
A. Arrasmith, L. Cincio, A. Sornborger +2 more·Dec 27, 2018
Although quantum computers are predicted to have many commercial applications, less attention has been given to their potential for resolving foundational issues in quantum mechanics. Here we focus on quantum computers’ utility for the Consistent His...