Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,642 papers in 12 months (-16% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Halving the cost of quantum multiplexed rotations
G. Low·Oct 26, 2021
We improve the number of $T$ gates needed for a $b$-bit approximation of a multiplexed quantum gate with $c$ controls applying $n$ single-qubit arbitrary phase rotations from $4n b+\mathcal{O}(\sqrt{cn b})$ to $2n b+\mathcal{O}(\sqrt{cn b})$, and red...
Hidden variable model for quantum computation with magic states on qudits of any dimension
Michael Zurel, C. Okay, R. Raussendorf +1 more·Oct 23, 2021
It was recently shown that a hidden variable model can be constructed for universal quantum computation with magic states on qubits. Here we show that this result can be extended, and a hidden variable model can be defined for quantum computation wit...
TELET: A Monotonic Algorithm to Design Large Dimensional Equiangular Tight Frames for Applications in Compressed Sensing
R.Jyothi, P.Babu·Oct 23, 2021
An Equiangular tight frame (ETF) also known as the Welch-bound-equality sequences consists of a sequence of unit norm vectors whose absolute inner product is identical and minimal. Due to this unique property, these frames are preferred in different ...
Molecular dynamics on quantum annealers
I. Gayday, D. Babikov, A. Teplukhin +5 more·Oct 22, 2021
In this work we demonstrate a practical prospect of using quantum annealers for simulation of molecular dynamics. A methodology developed for this goal, dubbed Quantum Differential Equations (QDE), is applied to propagate classical trajectories for t...
Efficient fully-coherent quantum signal processing algorithms for real-time dynamics simulation.
J. Martyn, Yuan Liu, Zachary E. Chin +1 more·Oct 21, 2021
Simulating the unitary dynamics of a quantum system is a fundamental problem of quantum mechanics, in which quantum computers are believed to have significant advantage over their classical counterparts. One prominent such instance is the simulation ...
QuantumNAT: Quantum Noise-Aware Training with Noise Injection, Quantization and Normalization
Hanrui Wang, Jiaqi Gu, Yongshan Ding +4 more·Oct 21, 2021
Parameterized Quantum Circuits (PQC) are promising towards quantum advantage on near-term quantum hardware. However, due to the large quantum noises (errors), the performance of PQC models has a severe degradation on real quantum devices. Take Quantu...
Graph Minor Embedding Can Affect Sampling Degenerate Ground States Using Quantum Annealing
N. Maruyama, Masayuki Ohzeki, Kazuyuki Tanaka·Oct 21, 2021
Quantum annealing, as currently implemented in hardware, cannot fairly sample all ground states. Graph minor embedding, which maps a problem to the hardware graph of quantum annealers, affects sampling all states. In this study, we demonstrate the in...
Quantum Chaos and Universal Trotterisation Behaviours in Digital Quantum Simulations
C. Kargi, A. Manatuly, L. M. Sieberer +7 more·Oct 21, 2021
Digital quantum simulation (DQS) is one of the most promising paths for achieving first useful real-world applications for quantum processors. Yet even assuming rapid progress in device engineering and development of fault-tolerant quantum processors...
Sampling diverse near-optimal solutions via algorithmic quantum annealing.
M. Mohseni, M. Rams, S. Isakov +5 more·Oct 20, 2021
Sampling a diverse set of high-quality solutions for hard optimization problems is of great practical relevance in many scientific disciplines and applications, such as artificial intelligence and operations research. One of the main open problems is...
Toward reliability in the NISQ era: Robust interval guarantee for quantum measurements on approximate states
Maurice Weber, A. Anand, Alba Cervera-Lierta +6 more·Oct 19, 2021
Near-term quantum computation holds potential across multiple application domains. However, imperfect preparation and evolution of states due to algorithmic and experimental shortcomings, characteristic in the near-term implementation, would typicall...
Logical fermions for fault-tolerant quantum simulation
A. Landahl, B. Morrison·Oct 19, 2021
We show how to absorb fermionic quantum simulation's expensive fermion-to-qubit mapping overhead into the overhead already incurred by surface-code-based fault-tolerant quantum computing. The key idea is to process information in surface-code twist d...
Tight Bounds on the Spooky Pebble Game: Recycling Qubits with Measurements
Niels Kornerup, J. Sadun, D. Soloveichik·Oct 18, 2021
Pebble games are popular models for analyzing time-space trade-offs. In particular, reversible pebble game strategies are frequently applied in quantum algorithms like Grover's search to efficiently simulate classical computation on inputs in superpo...
Classical-To-Quantum Transfer Learning for Spoken Command Recognition Based on Quantum Neural Networks
Jun Qi, Javier Tejedor·Oct 17, 2021
This work investigates an extension of transfer learning applied in machine learning algorithms to the emerging hybrid end-to-end quantum neural network (QNN) for spoken command recognition (SCR). Our QNN-based SCR system is composed of classical and...
Evaluation on Genetic Algorithms as an optimizer of Variational Quantum Eigensolver(VQE) method
Hikaru Wakaura, T. Tomono, Shoya Yasuda·Oct 14, 2021
Variational-Quantum-Eigensolver(VQE) method on a quantum computer is a well-known hybrid algorithm to solve the eigenstates and eigenvalues that uses both quantum and classical computers. This method has the potential to solve quantum chemical simula...
Observability of fidelity decay at the Lyapunov rate in few-qubit quantum simulations
M. D. Porter, I. Joseph·Oct 14, 2021
In certain regimes, the fidelity of quantum states will decay at a rate set by the classical Lyapunov exponent. This serves both as one of the most important examples of the quantum-classical correspondence principle and as an accurate test for the p...
Large scale multi-node simulations of $\mathbb{Z}_2$ gauge theory quantum circuits using Google Cloud Platform
Erik J. Gustafson, B. Holzman, J. Kowalkowski +14 more·Oct 14, 2021
Simulating quantum field theories on a quantum computer is one of the most exciting fundamental physics applications of quantum information science. Dynamical time evolution of quantum fields is a challenge that is beyond the capabilities of classica...
Unsupervised learning of correlated quantum dynamics on disordered lattices
Miri Kenig, Y. Lahini·Oct 13, 2021
Quantum particles co-propagating on disordered lattices develop complex non-classical correlations due to an interplay between quantum statistics, inter-particle interactions, and disorder. Here we present a deep learning algorithm based on Generativ...
Provably accurate simulation of gauge theories and bosonic systems
Yu Tong, Victor V. Albert, J. McClean +2 more·Oct 13, 2021
Quantum many-body systems involving bosonic modes or gauge fields have infinite-dimensional local Hilbert spaces which must be truncated to perform simulations of real-time dynamics on classical or quantum computers. To analyze the truncation error, ...
Variational Quantum Simulation of Chemical Dynamics with Quantum Computers.
Chee-Kong Lee, Chang-Yu Hsieh, Shengyu Zhang +1 more·Oct 12, 2021
Classical simulations of real-space quantum dynamics are challenging due to the exponential scaling of computational cost with system dimensions. Quantum computers offer the potential to simulate quantum dynamics with polynomial complexity; however, ...
Nearly Optimal Quantum Algorithm for Generating the Ground State of a Free Quantum Field Theory
Mohsen Bagherimehrab, Y. Sanders, D. Berry +2 more·Oct 12, 2021
We devise a quasilinear quantum algorithm for generating an approximation for the ground state of a quantum field theory (QFT). Our quantum algorithm delivers a super-quadratic speedup over the state-of-the-art quantum algorithm for ground-state gene...