Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Classical variational simulation of the Quantum Approximate Optimization Algorithm
Matija Medvidović, Giuseppe Carleo·Sep 3, 2020
A key open question in quantum computing is whether quantum algorithms can potentially offer a significant advantage over classical algorithms for tasks of practical interest. Understanding the limits of classical computing in simulating quantum syst...
Qibo: a framework for quantum simulation with hardware acceleration
Stavros Efthymiou, Sergi Ramos-Calderer, Carlos Bravo-Prieto +5 more·Sep 3, 2020
We present Qibo, a new open-source software for fast evaluation of quantum circuits and adiabatic evolution which takes full advantage of hardware accelerators. The growing interest in quantum computing and the recent developments of quantum hardware...
Quantum HF/DFT-embedding algorithms for electronic structure calculations: Scaling up to complex molecular systems.
Max Rossmannek, P. Barkoutsos, Pauline J. Ollitrault +1 more·Sep 3, 2020
In the near future, material and drug design may be aided by quantum computer assisted simulations. These have the potential to target chemical systems intractable by the most powerful classical computers. However, the resources offered by contempora...
Benchmarking 50-Photon Gaussian Boson Sampling on the Sunway TaihuLight
Yuxuan Li, L. Gan, Ming-Cheng Chen +6 more·Sep 2, 2020
Boson sampling is expected to be an important milestone that will demonstrate quantum computational advantage (or quantum supremacy). This work establishes the benchmarking of Gaussian boson sampling (GBS) with threshold detection based on the Sunway...
Fully-programmable universal quantum simulator with a one-dimensional quantum processor
V. Bastidas, T. Haug, C. Gravel +3 more·Sep 2, 2020
Current quantum devices execute specific tasks that are hard for classical computers and have the potential to solve problems such as quantum simulation of material science and chemistry, even without error correction. For practical applications it i...
Quantum discriminator for binary classification
Prasanna Date, Wyatt Smith·Sep 2, 2020
Quantum computers have the unique ability to operate relatively quickly in high-dimensional spaces—this is sought to give them a competitive advantage over classical computers. In this work, we propose a novel quantum machine learning model called th...
Efficient Encoding of the Weighted MAX $$k$$ k -CUT on a Quantum Computer Using QAOA
F. Fuchs, Herman Oie Kolden, Niels Henrik Aase +1 more·Sep 2, 2020
The weighted MAX $$k$$ k -CUT problem consists of finding a k -partition of a given weighted undirected graph G ( V , E ), such that the sum of the weights of the crossing edges is maximized. The problem is of particular interest as it has a multitu...
Quantum search for scaled hash function preimages
Sergi Ramos-Calderer, E. Bellini, J. Latorre +2 more·Sep 1, 2020
We present the implementation of Grover’s algorithm in a quantum simulator to perform a quantum search for preimages of two scaled hash functions, whose design only uses modular addition, word rotation and bitwise exclusive or. Our implementation pro...
Neural-network variational quantum algorithm for simulating many-body dynamics
Chee-Kong Lee, P. Patil, Shengyu Zhang +1 more·Aug 31, 2020
We propose a neural-network variational quantum algorithm to simulate the time evolution of quantum many-body systems. Based on a modified restricted Boltzmann machine (RBM) wavefunction ansatz, the proposed algorithm can be efficiently implemented i...
Quantum analytic descent
Bálint Koczor, S. Benjamin·Aug 31, 2020
Quantum variational algorithms are applicable to a range of tasks and have particular relevance for near-term quantum computers. The approach involves adjusting the parameterised elements of a quantum circuit to minimise the expected energy of the ou...
Supercomputer simulations of transmon quantum computers
D. Willsch·Aug 31, 2020
We develop a simulator for quantum computers composed of superconducting transmon qubits. The simulation model supports an arbitrary number of transmons and resonators. Quantum gates are implemented by time-dependent pulses. Nontrivial effects such a...
Quantum Solvers for Plane-Wave Hamiltonians: Abridging Virtual Spaces Through the Optimization of Pairwise Correlations
E. Bylaska, D. Song, Nicholas P. Bauman +3 more·Aug 31, 2020
For many-body methods such as MCSCF and CASSCF, in which the number of one-electron orbitals is optimized and independent of the basis set used, there are no problems with using plane-wave basis sets. However, for methods currently used in quantum co...
Efficient Classical Simulation and Benchmarking of Quantum Processes in the Weyl Basis.
Daniel Stilck França, Sergii Strelchuk, Michał Studziński·Aug 27, 2020
One of the crucial steps in building a scalable quantum computer is to identify the noise sources which lead to errors in the process of quantum evolution. Different implementations come with multiple hardware-dependent sources of noise and decoheren...
Concentration for random product formulas
Chi-Fang Chen, Hsin-Yuan Huang, Richard Kueng +1 more·Aug 26, 2020
Quantum simulation has wide applications in quantum chemistry and physics. Recently, scientists have begun exploring the use of randomized methods for accelerating quantum simulation. Among them, a simple and powerful technique, called qDRIFT, is kno...
Real-time simulation of (2+1)-dimensional lattice gauge theory on qubits
A. Yamamoto·Aug 26, 2020
We study the quantum simulation of $Z_2$ lattice gauge theory in 2+1 dimensions. The dual variable formulation, the so-called Wegner duality, is utilized for reducing redundant gauge degrees of freedom. The problem of artificial charge unconservati...
Algorithmic Error Mitigation Scheme for Current Quantum Processors
Philippe Suchsland, F. Tacchino, M. H. Fischer +3 more·Aug 25, 2020
We present a hardware agnostic error mitigation algorithm for near term quantum processors inspired by the classical Lanczos method. This technique can reduce the impact of different sources of noise at the sole cost of an increase in the number of m...
Prospects for quantum enhancement with diabatic quantum annealing
E. Crosson, Daniel A. Lidar·Aug 22, 2020
Optimization, sampling and machine learning are topics of broad interest that have inspired significant developments and new approaches in quantum computing. One such approach is quantum annealing (QA). In this Review, we assess the prospects for alg...
Simulating 2D Effects in Lattice Gauge Theories on a Quantum Computer
D. Paulson, Luca Dellantonio, J. Haase +8 more·Aug 21, 2020
Gauge theories are the most successful theories for describing nature at its fundamental level, but obtaining analytical or numerical solutions often remains a challenge. We propose an experimental quantum simulation scheme to study ground state prop...
A Monte Carlo Tree Search Framework for Quantum Circuit Transformation
Xiang-Yu Zhou, Yuan Feng, Sanjiang Li·Aug 21, 2020
In Noisy Intermediate-Scale Quantum (NISQ) era, quantum processing units (QPUs) suffer from, among others, highly limited connectivity between physical qubits. To make a quantum circuit executable, a circuit transformation process is necessary to tra...
Variational quantum simulation for periodic materials
N. Yoshioka, Takeshi Sato, Yuya O. Nakagawa +2 more·Aug 21, 2020
We present a quantum-classical hybrid algorithm that simulates electronic structures of periodic systems such as ground states and quasiparticle band structures. By extending the unitary coupled cluster (UCC) theory to describe crystals in arbitrary ...