Papers
Live trends in quantum computing research, updated daily from arXiv.
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15,746 papers in 12 months (-37% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Building quantum neural networks based on a swap test
Jian Zhao, Yuanhua Zhang, Changpeng Shao +3 more·Apr 29, 2019
Artificial neural network, consisting of many neurons in different layers, is an important method to simulate humain brain. Usually, one neuron has two operations: one is linear, the other is nonlinear. The linear operation is inner product and the n...
Coherent spin transport through helical edge states of topological insulator
R. Niyazov, D. Aristov, V. Kachorovskii·Apr 29, 2019
We study coherent spin transport through helical edge states of topological insulator tunnel-coupled to metallic leads. We demonstrate that unpolarized incoming electron beam acquires finite polarization after transmission through such a setup provid...
Validating multi-photon quantum interference with finite data
Fulvio Flamini, M. Walschaers, N. Spagnolo +3 more·Apr 28, 2019
Multi-particle interference is a key resource for quantum information processing, as exemplified by Boson Sampling. Hence, given its fragile nature, an essential desideratum is a solid and reliable framework for its validation. However, while several...
On analog quantum algorithms for the mixing of Markov chains
Shantanav Chakraborty, K. Luh, J. Roland·Apr 26, 2019
The problem of sampling from the stationary distribution of a Markov chain finds widespread applications in a variety of fields. The time required for a Markov chain to converge to its stationary distribution is known as the classical mixing time. In...
Algorithms for quantum control without discontinuities: Application to the simultaneous control of two qubits
D. D’Alessandro, B. Sheller·Apr 26, 2019
We propose a technique to design control algorithms for a class of finite dimensional quantum systems so that the control law does not present discontinuities. The class of models considered admits a group of symmetries which allows us to reduce the ...
Performance of a Quantum Annealer for Ising Ground State Computations on Chimera Graphs
M. Jünger, Elisabeth Lobe, Petra Mutzel +4 more·Apr 25, 2019
Quantum annealing is getting increasing attention in combinatorial optimization. The quantum processing unit by D-Wave is constructed to approximately solve Ising models on so-called Chimera graphs. Ising models are equivalent to quadratic unconstrai...
Resource optimized quantum architectures for surface code implementations of magic-state distillation
Adam Holmes, Yongshan Ding, Ali Javadi-Abhari +3 more·Apr 25, 2019
Abstract Quantum computers capable of solving classically intractable problems are under construction, and intermediate-scale devices are approaching completion. Current efforts to design large-scale devices require allocating immense resources to er...
A Blahut-Arimoto Type Algorithm for Computing Classical-Quantum Channel Capacity
Haobo Li, N. Cai·Apr 25, 2019
Based on Arimoto’s work in 1978 [1], we propose an iterative algorithm for computing the capacity of a discrete memoryless classical-quantum channel with a finite input alphabet and a finite dimensional output, which we call the Blahut-Arimoto algori...
On the Wilsonian Meaning of Quantum Error Correction
César Gómez·Apr 24, 2019
We sketch a recipe to define renormalization group transformations based on Kadanoff‐Wilson block packing using a quantum error correction code. In such a case the RG transformations of the couplings are determined by the error matrix of the QEC code...
Quantum dynamics of the small-polaron formation in a superconducting analog simulator
V. Stojanović, I. Salom·Apr 24, 2019
We propose a scheme for investigating the nonequilibrium aspects of small-polaron physics using an array of superconducting qubits and microwave resonators. This system, which can be realized with transmon or gatemon qubits, serves as an analog simul...
Leakage mitigation for quantum error correction using a mixed qubit scheme
N. C. Brown, K. Brown·Apr 24, 2019
Leakage errors take qubits out of the computational subspace and will accumulate if not addressed. A leaked qubit will reduce the effectiveness of quantum error correction protocols due to the cost of implementing leakage reduction circuits and the h...
SANQ: A Simulation Framework for Architecting Noisy Intermediate-Scale Quantum Computing System
Gushu Li, Yufei Ding, Yuan Xie·Apr 24, 2019
To bridge the gap between limited hardware access and the huge demand for experiments for Noisy Intermediate-Scale Quantum (NISQ) computing system study, a simulator which can capture the modeling of both the quantum processor and its classical contr...
Efficient symmetry-preserving state preparation circuits for the variational quantum eigensolver algorithm
Bryan T. Gard, Linghua Zhu, George S. Barron +3 more·Apr 24, 2019
The variational quantum eigensolver is one of the most promising approaches for performing chemistry simulations using noisy intermediate-scale quantum (NISQ) processors. The efficiency of this algorithm depends crucially on the ability to prepare mu...
Amplitude estimation without phase estimation
Yohichi Suzuki, Shumpei Uno, Rudy Raymond +3 more·Apr 23, 2019
This paper focuses on the quantum amplitude estimation algorithm, which is a core subroutine in quantum computation for various applications. The conventional approach for amplitude estimation is to use the phase estimation algorithm, which consists ...
Variational quantum unsampling on a quantum photonic processor
J. Carolan, M. Mohseni, J. Olson +9 more·Apr 23, 2019
A promising route towards the demonstration of near-term quantum advantage (or supremacy) over classical systems relies on running tailored quantum algorithms on noisy intermediate-scale quantum machines. These algorithms typically involve sampling f...
A Silicon Surface Code Architecture Resilient Against Leakage Errors
Z. Cai, M. Fogarty, S. Schaal +3 more·Apr 23, 2019
Spin qubits in silicon quantum dots are one of the most promising building blocks for large scale quantum computers thanks to their high qubit density and compatibility with the existing semiconductor technologies. High fidelity single-qubit gates ex...
Quantum-assisted associative adversarial network: applying quantum annealing in deep learning
M. Wilson, Thomas Vandal, T. Hogg +1 more·Apr 23, 2019
Generative models have the capacity to model and generate new examples from a dataset and have an increasingly diverse set of applications driven by commercial and academic interest. In this work, we present an algorithm for learning a latent variabl...
Efficient Online Quantum Generative Adversarial Learning Algorithms with Applications
Yuxuan Du, Min-Hsiu Hsieh, D. Tao·Apr 21, 2019
The recognition of entanglement states is a notoriously difficult problem when no prior information is available. Here, we propose an efficient quantum adversarial bipartite entanglement detection scheme to address this issue. Our proposal reformulat...
Optimizing Quantum Programs Against Decoherence: Delaying Qubits into Quantum Superposition
Yu Zhang, Haowei Deng, Quanxi Li +2 more·Apr 18, 2019
Quantum computing technology has reached a second renaissance in the last decade. However, in the NISQ era pointed out by John Preskill in 2018, quantum noise and decoherence, which affect the accuracy and execution effect of quantum programs, cannot...
Quantum link bootstrapping using a RuleSet-based communication protocol
Takaaki Matsuo, Cl'ement Durand, Rodney Van Meter·Apr 18, 2019
Establishing end-to-end quantum connections requires quantified link characteristics, and operations need to coordinate decision making between nodes across a network. We introduce the RuleSet-based communication protocol for supporting quantum opera...