Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Ground State, Magnetization Process and Bipartite Quantum Entanglement of a Spin-1/2 Ising–Heisenberg Model on Planar Lattices of Interconnected Trigonal Bipyramids
L. Gálisová, Michał Kaczor·Dec 1, 2021
The ground state, magnetization scenario and the local bipartite quantum entanglement of a mixed spin-1/2 Ising–Heisenberg model in a magnetic field on planar lattices formed by identical corner-sharing bipyramidal plaquettes is examined by combining...
Quantum Algorithm for Stochastic Optimal Stopping Problems with Applications in Finance
J. F. Doriguello, Alessandro Luongo, Jing Bao +2 more·Nov 30, 2021
The famous least squares Monte Carlo (LSM) algorithm combines linear least square regression with Monte Carlo simulation to approximately solve problems in stochastic optimal stopping theory. In this work, we propose a quantum LSM based on quantum ac...
Quantum Simulation of Molecules in Solution
D. Castaldo, S. Jahangiri, A. Delgado +1 more·Nov 26, 2021
Quantum chemical calculations on quantum computers have been focused mostly on simulating molecules in the gas phase. Molecules in liquid solution are, however, most relevant for chemistry. Continuum solvation models represent a good compromise betwe...
Probing many-body localization by excited-state variational quantum eigensolver
Shuo Liu, Shi-Xin Zhang, Chang-Yu Hsieh +2 more·Nov 26, 2021
Non-equilibrium physics including many-body localization (MBL) has attracted increasing attentions, but theoretical approaches of reliably studying non-equilibrium properties remain quite limited. In this Letter, we propose a systematic approach to p...
An Architecture for Meeting Quality-of-Service Requirements in Multi-User Quantum Networks
M. Skrzypczyk, S. Wehner·Nov 25, 2021
Quantum communication can enhance internet technology by enabling novel applications that are provably impossible classically. The successful execution of such applications relies on the generation of quantum entanglement between different users of t...
Understanding Quantum Technologies 2025
Olivier Ezratty·Nov 24, 2021
Understanding Quantum Technologies 2025 is the 8th update of a free open science ebook that provides a 360 degrees overview of quantum technologies from science and technology to geopolitical and societal issues. It covers quantum physics history, qu...
Efficient quantum computation of molecular forces and other energy gradients
T. O’Brien, Michael Streif, N. Rubin +12 more·Nov 24, 2021
While most work on the quantum simulation of chemistry has focused on computing energy surfaces, a similarly important application requiring subtly different algorithms is the computation of energy derivatives. Almost all molecular properties can be ...
Quantum state preparation by adiabatic evolution with custom gates
E. A. Coello Pérez, J. Bonitati, Dean Lee +2 more·Nov 24, 2021
Quantum state preparation by adiabatic evolution is currently rendered ineffective by the long implementation times of the underlying quantum circuits, comparable to the decoherence time of present and near-term quantum devices. These implementation ...
Generative Quantum Machine Learning
Christa Zoufal·Nov 24, 2021
The goal of generative machine learning is to model the probability distribution underlying a given data set. This probability distribution helps to characterize the generation process of the data samples. While classical generative machine learning ...
Simulating strongly interacting Hubbard chains with the variational Hamiltonian ansatz on a quantum computer
Baptiste Anselme Martin, P. Simon, M. Rančić·Nov 23, 2021
Hybrid quantum-classical algorithms have been proposed to circumvent noise limitations in quantum computers. Such algorithms delegate only a calculation of the expectation value to the quantum computer. Among them, the Variational Quantum Eigensolver...
Bridging the reality gap in quantum devices with physics-aware machine learning
D. L. Craig, H. Moon, F. Fedele +9 more·Nov 22, 2021
The discrepancies between reality and simulation impede the optimisation and scalability of solid-state quantum devices. Disorder induced by the unpredictable distribution of material defects is one of the major contributions to the reality gap. We b...
A Quantum Annealing Approach to Reduce Covid-19 Spread on College Campuses
James Sud, V. Li·Nov 22, 2021
Disruptions of university campuses caused by COVID-19 have motivated strategies to prevent the spread of infectious diseases while maintaining some level of in person learning. In response, the proposed approach recursively applied a quantum annealin...
Dimensional Expressivity Analysis, best-approximation errors, and automated design of parametric quantum circuits
L. Funcke, T. Hartung, K. Jansen +3 more·Nov 22, 2021
The design of parametric quantum circuits (PQCs) for efficient use in variational quantum simulations (VQS) is subject to two competing factors. On one hand, the set of states that can be generated by the PQC has to be large enough to contain the sol...
High robustness quantum walk search algorithm with qudit Householder traversing coin, machine learning study
Hristo Tonchev, Petar Danev·Nov 21, 2021
In this work the quantum random walk search algorithm with walk coin constructed by generalized Householder reflection and phase multiplier has been studied. The coin register is one qudit with arbitrary dimension. Monte Carlo simulations, in combina...
Simulation of quantum physics with Tensor Processing Units: brute-force computation of ground states and time evolution
M. Hauru, A. Morningstar, J. Beall +3 more·Nov 19, 2021
Tensor Processing Units (TPUs) were developed by Google exclusively to support large-scale machine learning tasks. TPUs can, however, also be used to accelerate and scale up other computationally demanding tasks. In this paper we repurpose TPUs for t...
Differentiable quantum computational chemistry with PennyLane
J. Arrazola, S. Jahangiri, A. Delgado +15 more·Nov 18, 2021
This work describes the theoretical foundation for all quantum chemistry functionality in PennyLane, a quantum computing software library specializing in quantum differentiable programming. We provide an overview of fundamental concepts in quantum ch...
A Quantum Algorithm for the Sub-graph Isomorphism Problem
Nicola Mariella, Andrea Simonetto·Nov 18, 2021
We propose a novel variational method for solving the sub-graph isomorphism problem on a gate-based quantum computer. The method relies (1) on a new representation of the adjacency matrices of the underlying graphs, which requires a number of qubits ...
Error-mitigated deep-circuit quantum simulation of open systems: Steady state and relaxation rate problems
Anbang Wang, Jingning Zhang, Ying Li·Nov 18, 2021
Deep-circuit quantum computation, like Shor's algorithm, is undermined by error accumulation, and near-future quantum techniques are far from adequate for full-fledged quantum error correction. Instead of resorting to shallow-circuit quantum algorith...
Robust quantum-network memory based on spin qubits in isotopically engineered diamond
C. Bradley, S. D. Bone, P. Møller +9 more·Nov 18, 2021
Quantum networks can enable quantum communication and modular quantum computation. A powerful approach is to use multi-qubit nodes that provide quantum memory and computational power. Nuclear spins associated with defects in diamond are promising qub...
Dynamical Anyon Generation in Kitaev Honeycomb Non-Abelian Spin Liquids.
Yue Liu, K. Slagle, K. Burch +1 more·Nov 17, 2021
Relativistic Mott insulators known as "Kitaev materials" potentially realize spin liquids hosting non-Abelian anyons. Motivated by fault-tolerant quantum-computing applications in this setting, we introduce a dynamical anyon-generation protocol that ...