Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Single-qubit gate teleportation provides a quantum advantage
Libor Caha, Xavier Coiteux-Roy, R. Koenig·Sep 28, 2022
Gate-teleportation circuits are arguably among the most basic examples of computations believed to provide a quantum computational advantage: In seminal work [Quantum Inf. Comput., 4(2):134--145], Terhal and DiVincenzo have shown that these circuits ...
Quantum phase processing and its applications in estimating phase and entropies
Youle Wang, Lei Zhang, Zhan Yu +1 more·Sep 28, 2022
Quantum computing can provide speedups in solving many problems as the evolution of a quantum system is described by a unitary operator in an exponentially large Hilbert space. Such unitary operators change the phase of their eigenstates and make qua...
Characterizing a non-equilibrium phase transition on a quantum computer
E. Chertkov, Zihan Cheng, A. Potter +13 more·Sep 26, 2022
Quantum systems subject to driving and dissipation display distinctive non-equilibrium phenomena relevant to condensed matter, quantum optics, metrology and quantum error correction. An example is the emergence of phase transitions with uniquely quan...
Evaluating the impact of noise on the performance of the Variational Quantum Eigensolver
Marita Oliv, A. Matic, Thomas Messerer +1 more·Sep 26, 2022
Quantum computers are expected to be highly beneficial for chemistry simulations, promising significant improvements in accuracy and speed. The most prominent algorithm for chemistry simulations on NISQ devices is the Variational Quantum Eigensolver (V...
Lattice regularizations of $\theta$ vacua: Anomalies and qubit models
Mendel Nguyen, Hersh Singh·Sep 26, 2022
Anomalies are a powerful way to gain insight into possible lattice regularizations of a quantum field theory. In this work, we argue that the continuum anomaly for a given symmetry can be matched by a manifestly-symmetric, local, lattice regularizati...
Making Trotterization Adaptive and Energy-Self-Correcting for NISQ Devices and Beyond
Hongzheng Zhao, M. Bukov, M. Heyl +1 more·Sep 26, 2022
Simulation of continuous time evolution requires time discretization on both classical and quantum computers. A finer time step improves simulation precision, but it inevitably leads to increased computational efforts. This is particularly costly for...
Magnetic phases of spatially modulated spin-1 chains in Rydberg excitons: Classical and quantum simulations.
M. Sajjan, H. Alaeian, S. Kais·Sep 23, 2022
In this work, we study the magnetic phases of a spatially modulated chain of spin-1 Rydberg excitons. Using the Density Matrix Renormalization Group (DMRG) technique, we study various magnetic and topologically nontrivial phases using both single-par...
Kernel-based quantum regressor models learning non-Markovianity
Diego Tancara, H. T. Dinani, A. Norambuena +2 more·Sep 23, 2022
Quantum machine learning is a growing research field that aims to perform machine learning tasks assisted by a quantum computer. Kernel-based quantum machine learning models are paradigmatic examples where the kernel involves quantum states, and the ...
Navigating the noise-depth tradeoff in adiabatic quantum circuits
Daniel Azses, M. Dupont, B. Evert +2 more·Sep 22, 2022
Adiabatic quantum algorithms solve computational problems by slowly evolving a trivial state to the desired solution. On an ideal quantum computer, the solution quality improves monotonically with increasing circuit depth. By contrast, increasing the...
A practical overview of image classification with variational tensor-network quantum circuits
Diego Guala, Shao-Fan Zhang, E. Cruz +3 more·Sep 22, 2022
Circuit design for quantum machine learning remains a formidable challenge. Inspired by the applications of tensor networks across different fields and their novel presence in the classical machine learning context, one proposed method to design vari...
Symplectic circuits, entanglement, and stimulated Hawking radiation in analogue gravity
Anthony J. Brady, I. Agulló, Dimitrios Kranas·Sep 22, 2022
We introduce a convenient set of analytical tools (the Gaussian formalism) and diagrams (sym-plectic circuits) to analyze multi-mode scattering events in analog gravity, such as pair-creation a l´a Hawking by black hole and white hole analog event ho...
Quantum circuit simulation of superchannels
Kai Wang, Dongsheng Wang·Sep 22, 2022
Quantum simulation is one of the central discipline to demonstrate the power of quantum computing. In recent years, the theoretical framework of quantum superchannels has been developed and applied widely as the extension of quantum channels. In this...
Radiative processes on a quantum computer
P. Bedaque, Ratna Khadka, G. Rupak +1 more·Sep 20, 2022
Radiative processes, where a photon/neutrino is emitted as a result of a collision or decay of a particle, play a central role in atomic, nuclear and particle physics. Their rate is determined by certain off-diagonal matrix elements with different in...
Cryogenic in-memory computing using magnetic topological insulators
Yuting Liu, Albert Lee, Kun Qian +14 more·Sep 20, 2022
Machine learning algorithms have proven to be effective for essential quantum computation tasks such as quantum error correction and quantum control. Efficient hardware implementation of these algorithms at cryogenic temperatures is essential. Here w...
Fast Ion Gates Outside the Lamb-Dicke Regime by Robust Quantum Optimal Control
Xiaodong Yang, Y. Lin, Yao Lu +1 more·Sep 20, 2022
We present a robust quantum optimal control framework for implementing fast entangling gates on ion-trap quantum processors. The framework leverages tailored laser pulses to drive the multiple vibrational sidebands of the ions to create phonon-mediat...
Digital quantum simulation of the BCS model with a central-spin-like quantum processor
Jan Ruh, Regina Finsterhoelzl, G. Burkard·Sep 19, 2022
The simulation of quantum systems is one of the most promising applications of quantum computers. In this paper we present a quantum algorithm to perform digital quantum simulations of the BCS model on a quantum register with a star shaped connectivi...
C2QA - Bosonic Qiskit
Timothy J Stavenger, E. Crane, Kevin C. Smith +3 more·Sep 19, 2022
The practical benefits of hybrid quantum information processing hardware that contains continuous-variable objects (bosonic modes such as mechanical or electromagnetic oscillators) in addition to traditional (discrete-variable) qubits have recently b...
Time complexity analysis of quantum algorithms via linear representations for nonlinear ordinary and partial differential equations
Shi Jin, Nana Liu, Yue Yu·Sep 18, 2022
We construct quantum algorithms to compute the solution and/or physical observables of nonlinear ordinary differential equations (ODEs) and nonlinear Hamilton-Jacobi equations (HJE) via linear representations or exact mappings between nonlinear ODEs/...
Quantum Computing Methods for Supply Chain Management
Hansheng Jiang, Z. Shen, Junyu Liu·Sep 17, 2022
Quantum computing is expected to have transformative influences on many domains, but its practical deployments on industry problems are underexplored. We focus on applying quantum computing to operations management problems in industry, and in partic...
Variational quantum algorithm for measurement extraction from the Navier-Stokes, Einstein, Maxwell, B-type, Lin-Tsien, Camassa-Holm, DSW, H-S, KdV-B, non-homogeneous KdV, generalized KdV, KdV, translational KdV, sKdV, B-L and Airy equations
Pete Rigas·Sep 16, 2022
Classical-quantum hybrid algorithms have recently garnered significant attention, which are characterized by combining quantum and classical computing protocols to obtain readout from quantum circuits of interest. Recent progress due to Lubasch et al...