Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Robust resource-efficient quantum variational ansatz through an evolutionary algorithm
Yuhan Huang, Qing Li, Xiaokai Hou +4 more·Feb 28, 2022
Variational quantum algorithms (VQAs) are promising methods to demonstrate quantum advantage on near-term devices as the required resources are divided between a quantum simulator and a classical optimizer. As such, designing a VQA which is resource-...
QOC: Quantum On-Chip Training with Parameter Shift and Gradient Pruning
Hanrui Wang, Zi-Chen Li, Jiaqi Gu +3 more·Feb 26, 2022
Parameterized Quantum Circuits (PQC) are drawing increasing research interest thanks to its potential to achieve quantum advantages on near-term Noisy Intermediate Scale Quantum (NISQ) hardware. In order to achieve scalable PQC learning, the training...
Simulating spectroscopy experiments with a superconducting quantum computer
John P. T. Stenger, G. Ben-Shach, D. Pekker +1 more·Feb 25, 2022
We present a novel method for solving eigenvalue problems on a quantum computer based on spectroscopy. The method works by coupling a"probe"qubit to a set of system simulation qubits and then time evolving both the probe and the system under Hamilton...
N-Electron Valence Perturbation Theory with Reference Wave Functions from Quantum Computing: Application to the Relative Stability of Hydroxide Anion and Hydroxyl Radical.
Alessandro Tammaro, D. Galli, J. Rice +1 more·Feb 25, 2022
Quantum simulations of the hydroxide anion and hydroxyl radical are reported, employing variational quantum algorithms for near-term quantum devices. The energy of each species is calculated along the dissociation curve, to obtain information about t...
CAFQA: A Classical Simulation Bootstrap for Variational Quantum Algorithms
Gokul Subramanian Ravi, P. Gokhale, Yi Ding +7 more·Feb 25, 2022
Classical computing plays a critical role in the advancement of quantum frontiers in the NISQ era. In this spirit, this work uses classical simulation to bootstrap Variational Quantum Algorithms (VQAs). VQAs rely upon the iterative optimization of a ...
Basic elements for simulations of standard-model physics with quantum annealers: Multigrid and clock states
Marc Illa, M. Savage·Feb 24, 2022
We explore the potential of D-Wave’s quantum annealers for computing some of the basic com-ponents required for quantum simulations of Standard Model physics. By implementing a basic multigrid (including “zooming”) and specializing Feynman-clock algo...
Tensor-network discriminator architecture for classification of quantum data on quantum computers
M. Wall, P. Titum, G. Quiroz +2 more·Feb 22, 2022
We demonstrate the use of matrix product state (MPS) models for discriminating quantum data on quantum computers using holographic algorithms, focusing on classifying a translationally invariant quantum state based on $L$ qubits of quantum data extra...
Towards Quantum Gates with Wide Operating Margins
R. Epstein·Feb 21, 2022
Scaling up quantum computing hardware is hindered by the narrow operating margins of current quantum components. Here, we introduce a composite qubit and gate scheme that achieves wide margins by use of transistor-like nonlinearities to suppress the ...
Improved Variational Quantum Eigensolver Via Quasidynamical Evolution
M. Jattana, F. Jin, H. Raedt +1 more·Feb 21, 2022
The variational quantum eigensolver (VQE) is a hybrid quantum-classical algorithm designed for current and near-term quantum devices. Despite its initial success, there is a lack of understanding involving several of its key aspects. There are proble...
Quantum Circuits for the Preparation of Spin Eigenfunctions on Quantum Computers
A. Carbone, D. Galli, M. Motta +1 more·Feb 19, 2022
The application of quantum algorithms to the study of many-particle quantum systems requires the ability to prepare wave functions that are relevant in the behavior of the system under study. Hamiltonian symmetries are important instruments used to c...
Quantifying dynamical magic with completely stabilizer preserving operations as free
Gaurav Saxena, G. Gour·Feb 16, 2022
In this paper, we extend the resource theory of magic to the channel case by considering completely stabilizer preserving operations (CSPOs) as free. We introduce and characterize the set of CSPO preserving and completely CSPO preserving superchannel...
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 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...
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...
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...
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...
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...
Co-Design quantum simulation of nanoscale NMR
Manuel G. Algaba, Mario Ponce-Martinez, C. Munuera-Javaloy +7 more·Feb 11, 2022
Quantum computers have the potential to efficiently simulate the dynamics of nanoscale NMR systems. In this work we demonstrate that a noisy intermediate-scale quantum computer can be used to simulate and predict nanoscale NMR resonances. In order to...
Grid-based methods for chemistry simulations on a quantum computer
Hans Hon Sang Chan, Richard Meister, Tyson Jones +2 more·Feb 11, 2022
First-quantized, grid-based methods for chemistry modeling are a natural and elegant fit for quantum computers. However, it is infeasible to use today’s quantum prototypes to explore the power of this approach because it requires a substantial number...