Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum Gaussian filter for exploring ground-state properties
Mingjun He, Dan-Bo Zhang, Z. D. Wang·Dec 11, 2021
Filter methods realize a projection from a superposed quantum state onto a target state, which can be efficient if two states have sufficient overlap. Here we propose a quantum Gaussian filter (QGF) with the filter operator being a Gaussian function ...
Quantum signal processing for simulating cold plasma waves
I. Novikau, E. Startsev, I. Dodin·Dec 11, 2021
Numerical modeling of radio-frequency waves in plasma with sufficiently high spatial and temporal resolution remains challenging even with modern computers. However, such simulations can be sped up using quantum computers in the future. Here, we propo...
Mapping the metal-insulator phase diagram by algebraically fast-forwarding dynamics on a cloud quantum computer
Thomas Steckmann, Trevor Keen, Efekan Kökcü +3 more·Dec 10, 2021
Dynamical mean-field theory (DMFT) maps the local Green's function of the Hubbard model to that of the Anderson impurity model and thus gives an approximate solution of the Hubbard model from the solution of simpler quantum impurity model. Quantum an...
Quantum Architecture Search via Continual Reinforcement Learning
Esther Ye, Samuel Yen-Chi Chen·Dec 10, 2021
Quantum computing has promised significant improvement in solving difficult computational tasks over classical computers. Designing quantum circuits for practical use, however, is not a trivial objective and requires expert-level knowledge. To aid th...
Quantum error correction with gauge symmetries
A. Rajput, A. Roggero, N. Wiebe·Dec 9, 2021
Quantum simulations of lattice gauge theories (LGTs) are often formulated on an enlarged Hilbert space containing both physical and unphysical sectors in order to retain a local Hamiltonian. We provide simple fault-tolerant procedures that exploit su...
Optimal Thresholds for Fracton Codes and Random Spin Models with Subsystem Symmetry.
Hao Song, Janik Schönmeier-Kromer, Ke Liu +3 more·Dec 9, 2021
Fracton models provide examples of novel gapped quantum phases of matter that host intrinsically immobile excitations and therefore lie beyond the conventional notion of topological order. Here, we calculate optimal error thresholds for quantum error...
Dual-map framework for noise characterization of quantum computers
James Sud, Jeffrey Marshall, Zhihui Wang +2 more·Dec 8, 2021
In order to understand the capabilities and limitations of quantum computers, it is necessary to develop methods that efficiently characterize and benchmark error channels present on these devices. In this paper, we present a method that faithfully r...
Quantum error correction in the noisy intermediate-scale quantum regime for sequential quantum computing
Arvid Rolander, A. Kinos, A. Walther·Dec 7, 2021
We use density matrix simulations to study the performance of three distance three quantum error correcting codes in the context of the rare-earth-ion-doped crystal (RE) platform for quantum computing. We analyze pseudothresholds for these codes when...
A quantum processor based on coherent transport of entangled atom arrays
D. Bluvstein, H. Levine, G. Semeghini +9 more·Dec 7, 2021
The ability to engineer parallel, programmable operations between desired qubits within a quantum processor is key for building scalable quantum information systems1,2. In most state-of-the-art approaches, qubits interact locally, constrained by the ...
Quantum simulation of chiral phase transitions
Alexander M. Czajka, Zhong-Bo Kang, Henry Ma +1 more·Dec 7, 2021
The Nambu–Jona-Lasinio (NJL) model has been widely studied for investigating the chiral phase structure of strongly interacting matter. The study of the thermodynamics of field theories within the framework of Lattice Field Theory is limited by the s...
Feasibility study of quantum computing using trapped electrons
Qian Yu, A. Alonso, Jackie Caminiti +7 more·Dec 7, 2021
We investigate the feasibility of using electrons in a linear Paul trap as qubits in a future quantum computer. We discuss the necessary experimental steps to realize such a device through a concrete design proposal, including trapping, cooling, elec...
Hybrid quantum-classical algorithm for computing imaginary-time correlation functions
Rihito Sakurai, W. Mizukami, H. Shinaoka·Dec 6, 2021
Quantitative descriptions of strongly correlated materials pose a considerable challenge in condensed matter physics and chemistry. A promising approach to address this problem is quantum embedding methods. In particular, the dynamical mean-field the...
Qubit noise deconvolution
Stefano Mangini, L. Maccone, C. Macchiavello·Dec 6, 2021
We present a noise deconvolution technique to remove a wide class of noises when performing arbitrary measurements on qubit systems. In particular, we derive the inverse map of the most common single qubit noisy channels, and exploit it at the data p...
Quantum algorithms for the generalized eigenvalue problem
Jin‐Min Liang, Shuqian Shen, Ming Li +1 more·Dec 5, 2021
The generalized eigenvalue (GE) problems are of particular importance in various areas of science engineering and machine learning. We present a variational quantum algorithm for finding the desired generalized eigenvalue of the GE problem, A|ψ⟩=λB|ψ...
A Quantum Computer Amenable Sparse Matrix Equation Solver
Christopher D. Phillips, V. H. U. O. Manitoba, Winnipeg +1 more·Dec 5, 2021
—Quantum computation offers a promising alterna- tive to classical computing methods in many areas of numerical science, with algorithms that make use of the unique way in which quantum computers store and manipulate data often achieving dramatic imp...
Quantum Simulations of Loop Quantum Gravity
S. Shah·Dec 4, 2021
Loop Quantum Gravity (LQG) is one of the leading approaches to unify quantum physics and General Relativity (GR). The Hilbert space of LQG is spanned by spin-networks which describe the local geometry of quantum space-time. Simulation of LQG spin-net...
Markov chain Monte Carlo enhanced variational quantum algorithms
T. Patti, Omar Shehab, K. Najafi +1 more·Dec 3, 2021
Variational quantum algorithms have the potential for significant impact on high-dimensional optimization, with applications in classical combinatorics, quantum chemistry, and condensed matter. Nevertheless, the optimization landscape of these algori...
Limitations of Linear Cross-Entropy as a Measure for Quantum Advantage
Xun Gao, M. Kalinowski, Chi-Ning Chou +3 more·Dec 3, 2021
Demonstrating quantum advantage requires experimental implementation of a computational task that is hard to achieve using state-of-the-art classical systems. One approach is to perform sampling from a probability distribution associated with a class...
Best-Practice Aspects of Quantum-Computer Calculations: A Case Study of the Hydrogen Molecule
Ivana Miháliková, M. Friák, Matej Pivoluska +3 more·Dec 2, 2021
Quantum computers are reaching one crucial milestone after another. Motivated by their progress in quantum chemistry, we performed an extensive series of simulations of quantum-computer runs that were aimed at inspecting the best-practice aspects of ...
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...