Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Recompilation-enhanced simulation of electron–phonon dynamics on IBM quantum computers
Ben Jaderberg, A. Eisfeld, D. Jaksch +1 more·Feb 16, 2022
Simulating quantum systems is believed to be one of the first applications for which quantum computers may demonstrate a useful advantage. For many problems in physics, we are interested in studying the evolution of the electron–phonon Hamiltonian, f...
Quantum Neuron with Separable-State Encoding
London Cavaletto, L. Candelori, A. Matos-Abiague·Feb 16, 2022
The use of advanced quantum neuron models for pattern recognition applications requires fault tolerance. Therefore, it is not yet possible to test such models on a large scale in currently available quantum processors. As an alternative, we propose a...
Approximating Output Probabilities of Shallow Quantum Circuits which are Geometrically-local in any Fixed Dimension
Suchetan Dontha, Shi Jie Samuel Tan, Stephen G. Z. Smith +2 more·Feb 16, 2022
We present a classical algorithm that, for any $D$-dimensional geometrically-local, quantum circuit $C$ of polylogarithmic-depth, and any bit string $x \in {0,1}^n$, can compute the quantity $||^2$ to within any inverse-polynomial additive error in q...
Quantum Lazy Training
E. Abedi, Salman Beigi, Leila Taghavi·Feb 16, 2022
In the training of over-parameterized model functions via gradient descent, sometimes the parameters do not change significantly and remain close to their initial values. This phenomenon is called lazy training and motivates consideration of the line...
Uncertainty-disturbance relations and applications
Liang-Liang Sun, Kishor Bharti, Xiang Zhou +3 more·Feb 15, 2022
Uncertainty and intrinsic measurement disturbance, two fundamental concepts in quantum measurement, have conventionally been viewed as distinct and studied separately. In this work, we establish a fundamental connection between them, proving that unc...
Suppressing ZZ crosstalk of Quantum computers through pulse and scheduling co-optimization
Lei Xie, Jidong Zhai, Zhenxing Zhang +3 more·Feb 15, 2022
Noise is a significant obstacle to quantum computing, and ZZ crosstalk is one of the most destructive types of noise affecting superconducting qubits. Previous approaches to suppressing ZZ crosstalk have mainly relied on specific chip design that can...
Range dependent Hamiltonian algorithms for numerical QUBO formulation
Hyunju Lee, Kyungtaek Jun·Feb 15, 2022
With the advent and development of quantum computers, various quantum algorithms that can solve linear equations and eigenvalues faster than classical computers have been developed. In particular, a hybrid solver provided by D-Wave’s Leap quantum clo...
Certification of Gaussian Boson Sampling via graph theory
Taira Giordani, Valerio Mannucci, N. Spagnolo +4 more·Feb 15, 2022
Gaussian Boson Sampling is a non-universal model for quantum computing inspired by the original formulation of the Boson Sampling problem. Nowadays, it represents a paradigmatic quantum platform to reach the quantum advantage regime in a specific com...
High-frequency traveling-wave phononic cavity with sub-micron wavelength
Xin-Biao Xu, Jia-Qi Wang, Yuancai Yang +7 more·Feb 15, 2022
Thin-film gallium nitride (GaN) is a promising platform for phononic integrated circuits that hold great potential for scalable information processing processors. Here, an unsuspended traveling phononic resonator based on a high-acoustic-index-contra...
Saturable Purcell filter for circuit quantum electrodynamics
I. Iakoupov, K. Koshino·Feb 15, 2022
We consider a typical circuit QED setup where an artificial atom encodes a qubit and is dispersively coupled to a measurement resonator that in turn is coupled to a transmission line. We show theoretically that by placing another artificial atom in t...
An open-source modular framework for quantum computing
S. Carrazza, Stavros Efthymiou, M. Lazzarin +1 more·Feb 14, 2022
In this proceedings we describe the current development status and recent technical achievements of Qibo, an open-source framework for quantum simulation. After a concise overview of the project goal, we introduce the modular layout for backend abstr...
Variational quantum solutions to the Shortest Vector Problem
Martin R. Albrecht, Miloš Prokop, Yixin Shen +1 more·Feb 14, 2022
A fundamental computational problem is to find a shortest non-zero vector in Euclidean lattices, a problem known as the Shortest Vector Problem (SVP). This problem is believed to be hard even on quantum computers and thus plays a pivotal role in post...
Quantum computation capability verification protocol for noisy intermediate-scale quantum devices with the dihedral coset problem
Ruge Lin, Weiqiang Wen·Feb 14, 2022
In this article, we propose an interactive protocol for one party (the verifier) holding a quantum computer to verify the quantum computation power of another party's (the prover) device via a one-way quantum channel. This protocol is referred to as ...
Studying quantum algorithms for particle track reconstruction in the LUXE experiment
L. Funcke, T. Hartung, B. Heinemann +7 more·Feb 14, 2022
The LUXE experiment (LASER Und XFEL Experiment) is a new experiment in planning at DESY Hamburg, which will study Quantum Electrodynamics (QED) at the strong-field frontier. In this regime, QED is non-perturbative. This manifests itself in the creati...
Hardware-Efficient Entangled Measurements for Variational Quantum Algorithms
F. Escudero, D. Fern'andez-Fern'andez, Gabriel Jaumà +2 more·Feb 14, 2022
Variational algorithms have received significant attention in recent years due to their potential to solve practical problems using noisy intermediate-scale quantum (NISQ) devices. A fundamental step of these algorithms is the evaluation of the expec...
Slowing down light in a qubit metamaterial
J. Brehm, R. Gebauer, A. Stehli +4 more·Feb 14, 2022
The rapid progress in quantum information processing leads to a rising demand for devices to control the propagation of electromagnetic wave pulses and to ultimately realize universal and efficient quantum memory. While in recent years, significant p...
Wasserstein Solution Quality and the Quantum Approximate Optimization Algorithm: A Portfolio Optimization Case Study
J. Baker, Santosh Kumar Radha·Feb 14, 2022
Optimizing of a portfolio of financial assets is a critical industrial problem which can be approximately solved using algorithms suitable for quantum processing units (QPUs). We benchmark the success of this approach using the Quantum Approximate Op...
State Preparation Boosters for Early Fault-Tolerant Quantum Computation
Guoming Wang, Sukin Sim, Peter D. Johnson·Feb 14, 2022
Quantum computing is believed to be particularly useful for the simulation of chemistry and materials, among the various applications. In recent years, there have been significant advancements in the development of near-term quantum algorithms for qu...
Optimizing quantum circuits with Riemannian gradient flow
R. Wiersema, N. Killoran·Feb 14, 2022
Variational quantum algorithms are a promising class of algorithms that can be performed on currently available quantum computers. In most settings, the free parameters of a variational circuit are optimized using a classical optimizer that updates p...
Quantum matching pursuit: A quantum algorithm for sparse representations
Armando Bellante, S. Zanero·Feb 11, 2022
Representing signals with sparse vectors has a wide range of applications that range from image and video coding to shape representation and health monitoring. In many applications with real-time requirements, or that deal with high-dimensional signa...