Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Efficient quantum analytic nuclear gradients with double factorization.
E. Hohenstein, O. Oumarou, Rachael Al-Saadon +4 more·Jul 26, 2022
Efficient representations of the Hamiltonian, such as double factorization, drastically reduce the circuit depth or the number of repetitions in error corrected and noisy intermediate-scale quantum (NISQ) algorithms for chemistry. We report a Lagrang...
Quantum simulation of quantum phase transitions using the convex geometry of reduced density matrices
Samuel Warren, LeeAnn M. Sager-Smith, D. Mazziotti·Jul 26, 2022
Transitions of many-particle quantum systems between distinct phases at absolute-zero temperature, known as quantum phase transitions, require an exacting treatment of particle correlations. In this work, we present a general quantum-computing approa...
Mitigation of Quasiparticle Loss in Superconducting Qubits by Phonon Scattering
A. Bargerbos, L. J. Splitthoff, M. Pita-Vidal +6 more·Jul 26, 2022
Quantum error correction will be an essential ingredient in realizing fault-tolerant quantum computing. However, most correction schemes rely on the assumption that errors are sufficiently uncorrelated in space and time. In superconducting qubits thi...
Optical realization of one-dimensionalgeneralized split-step quantum walks
P. A. A. Yasir, Abhaya S. Hegde, C. M. Chandrashekar·Jul 25, 2022
Quantum walks are more than tools for building quantum algorithms. They have been used effectively to model and simulate quantum dynamics in many complex physical processes. Particularly, a variant of discrete-time quantum walk known as split-step qu...
Parallelization techniques for quantum simulation of fermionic systems
Jacob Bringewatt, Z. Davoudi·Jul 25, 2022
Mapping fermionic operators to qubit operators is an essential step for simulating fermionic systems on a quantum computer. We investigate how the choice of such a mapping interacts with the underlying qubit connectivity of the quantum processor to e...
Molecular Quantum Circuit Design: A Graph-Based Approach
Jakob S. Kottmann·Jul 25, 2022
Science is rich in abstract concepts that capture complex processes in astonishingly simple ways. A prominent example is the reduction of molecules to simple graphs. This work introduces a design principle for parametrized quantum circuits based on c...
Control of dephasing in spin qubits during coherent transport in silicon
M. Feng, J. Yoneda, W. Huang +12 more·Jul 25, 2022
One of the key pathways towards scalability of spin-based quantum computing systems lies in achieving long-range interactions between electrons and increasing their inter-connectivity. Coherent spin transport is one of the most promising strategies t...
AutoComm: A Framework for Enabling Efficient Communication in Distributed Quantum Programs
Anbang Wu, Hezi Zhang, Gushu Li +3 more·Jul 24, 2022
Distributed quantum computing (DQC) is a promising approach to extending the computational power of near-term quantum hardware. However, the non-local quantum communication between quantum nodes is much more expensive and error-prone than the local q...
Gate Based Implementation of the Laplacian with BRGC Code for Universal Quantum Computers
E. Rrapaj, K. McElvain, Chia-Cheng Chang +2 more·Jul 24, 2022
We study the gate-based implementation of the binary reflected Gray code (BRGC) and binary code of the unitary time evolution operator due to the Laplacian discretized on a lattice with periodic boundary conditions. We find that the resulting Trotter e...
Resources for Bosonic Quantum Computational Advantage.
Ulysse Chabaud, M. Walschaers·Jul 24, 2022
Quantum computers promise to dramatically outperform their classical counterparts. However, the nonclassical resources enabling such computational advantages are challenging to pinpoint, as it is not a single resource but the subtle interplay of many...
Mixer Hamiltonian with QAOA for Max k-coloring : numerical evaluations
E. Bourreau, G. Fleury, P. Lacomme·Jul 23, 2022
. This paper concerns quantum heuristics based on Mixer Hamiltonians that allow to restrict investigation on a specific subspace. Mixer Hamiltonian based approaches can be included in QAOA algorithm and we can state that Mixer Hamiltonians are mappin...
Quantum Multiple-Valued Decision Diagrams with Linear Transformations
Yonghong Li, H. Miao·Jul 23, 2022
Due to the rapid development of quantum computing, the compact representation of quantum operations based on decision diagrams has been received more and more attraction. Since variable orders have a significant impact on the size of the decision dia...
Generating quantum feature maps for SVM classifier
Bang-Shien Chen, J. Chern·Jul 23, 2022
We present and compare two methods of generating quantum feature maps for quantum-enhanced support vector machine, a classifier based on kernel method, by which we can access high dimensional Hilbert space efficiently. The first method is a genetic a...
A path integral ground state Monte Carlo algorithm for entanglement of lattice bosons
Emanuel Casiano-Diaz, C. Herdman, A. Maestro·Jul 23, 2022
A ground state path integral quantum Monte Carlo algorithm is introduced that allows for the study of entanglement in lattice bosons at zero temperature. The Rényi entanglement entropy between spatial subregions is explored across the phase diagram o...
A Multiscale Simulation Approach for Germanium-Hole-Based Quantum Processor
Tong Wu, Jing Guo·Jul 23, 2022
A multiscale simulation method is developed to model a quantum dot (QD) array of germanium (Ge) holes for quantum computing. Guided by 3-D numerical quantum device simulations of QD structures, an analytical model of the tunnel coupling between the n...
Trapped Ions as an Architecture for Quantum Computing
Gabriel P. L. M. Fernandes, A. C. Ricardo, F. R. Cardoso +1 more·Jul 23, 2022
In this paper we describe one of the most promising platforms for the construction of a universal quantum computer, which consists of a chain of $N$ ions trapped in a harmonic potential, whose internal states work out as qubits, and are coupled to co...
Well-conditioned multi-product formulas for hardware-friendly Hamiltonian simulation
Almudena Carrera Vazquez, D. Egger, David Ochsner +1 more·Jul 22, 2022
Simulating the time-evolution of a Hamiltonian is one of the most promising applications of quantum computers. Multi-Product Formulas (MPFs) are well suited to replace standard product formulas since they scale better with respect to time and approxi...
Tailgating quantum circuits for high-order energy derivatives
J. Ceroni, A. Delgado, S. Jahangiri +1 more·Jul 22, 2022
To understand the chemical properties of molecules, it is often important to study derivatives of energies with respect to nuclear coordinates or external fields. Quantum algorithms for computing energy derivatives have been proposed, but only limite...
Verifying Fairness in Quantum Machine Learning
J. Guan, Wang Fang, M. Ying·Jul 22, 2022
Due to the beyond-classical capability of quantum computing, quantum machine learning is applied independently or embedded in classical models for decision making, especially in the field of finance. Fairness and other ethical issues are often one of...
CoqQ: Foundational Verification of Quantum Programs
Li Zhou, G. Barthe, Pierre-Yves Strub +2 more·Jul 22, 2022
CoqQ is a framework for reasoning about quantum programs in the Coq proof assistant. Its main components are: a deeply embedded quantum programming language, in which classic quantum algorithms are easily expressed, and an expressive program logic fo...