Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Generalised Quantum Tree Search
A. Sequeira, L. Santos, L. S. Barbosa·Mar 25, 2021
This extended abstract reports on on-going research on quantum algorithmic approaches to the problem of generalised tree search that may exhibit effective quantum speedup, even in the presence of non-constant branching factors. Two strategies are bri...
Demonstration of Shor’s factoring algorithm for N \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$=$$\end{document}= 2
Unathi Skosana, M. Tame·Mar 25, 2021
We report a proof-of-concept demonstration of a quantum order-finding algorithm for factoring the integer 21. Our demonstration involves the use of a compiled version of the quantum phase estimation routine, and builds upon a previous demonstration. ...
Learning Temporal Quantum Tomography
Q. Tran, K. Nakajima·Mar 25, 2021
Quantifying and verifying the control level in preparing a quantum state are central challenges in building quantum devices. The quantum state is characterized from experimental measurements, using a procedure known as tomography, which requires a va...
Heating of a Trapped Ion Induced by Dielectric Materials.
M. Teller, D. Fioretto, P. Holz +8 more·Mar 25, 2021
Electric-field noise due to surfaces disturbs the motion of nearby trapped ions, compromising the fidelity of gate operations that are the basis for quantum computing algorithms. We present a method that predicts the effect of dielectric materials on...
Rydberg quantum computation with nuclear spins in two-electron neutral atoms
Xiao-Feng Shi·Mar 25, 2021
Alkaline-earth-like (AEL) atoms with two valence electrons and a nonzero nuclear spin can be excited to Rydberg state for quantum computing. Typical AEL ground states possess no hyperfine splitting, but unfortunately a GHz-scale splitting seems neces...
Robust entanglement detection in arbitrary two-mode Gaussian state: a Stokes-like operator-based approach
Arijit Dutta, Sibasish Ghosh, Jaewan Kim +1 more·Mar 24, 2021
Detection of entanglement in quantum states is one of the most important problems in quantum information processing. However, it is one of the most challenging tasks to find a universal scheme which is also desired to be optimal to detect entanglemen...
Preparing Bethe Ansatz Eigenstates on a Quantum Computer
J. V. Van Dyke, George S. Barron, N. Mayhall +2 more·Mar 24, 2021
Several quantum many-body models in one dimension possess exact solutions via the Bethe ansatz method, which has been highly successful for understanding their behavior. Nevertheless, there remain physical properties of such models for which analytic...
Linear Ascending Metrological Algorithm
M. Perelshtein, N. Kirsanov, V. Zemlyanov +4 more·Mar 24, 2021
The ubiquitous presence of shot noise sets a fundamental limit to the measurement precision in classical metrology. Recent advances in quantum devices and novel quantum algorithms utilizing interference effects are opening new routes for overcoming t...
Approximate amplitude encoding in shallow parameterized quantum circuits and its application to financial market indicators
Kouhei Nakaji, Shumpei Uno, Yohichi Suzuki +6 more·Mar 24, 2021
Efficient methods for loading given classical data into quantum circuits are essential for various quantum algorithms. In this paper, we propose an algorithm called Approximate Amplitude Encoding that can effectively load all the components of a give...
A staggered gauge-invariant quantum cellular automaton for both the Kogut-Susskind Schwinger model and the Dirac equation
Kevissen Sellapillay, P. Arrighi, G. Molfetta·Mar 24, 2021
We build a quantum cellular automaton (QCA) which coincides with 1+1 QED on its known continuum limits. It consists in a circuit of unitary gates driving the evolution of particles on a one dimensional lattice, and having them interact with the gauge...
Quantum Computing with Circular Rydberg Atoms
S. Cohen, Jeff D. Thompson·Mar 23, 2021
Rydberg atom arrays are a leading platform for quantum computing and simulation, combining strong interactions with highly coherent operations and flexible geometries. However, the achievable fidelities are limited by the finite lifetime of the Rydbe...
Graph-state representation of the toric code
Pengcheng Liao, D. Feder·Mar 23, 2021
Given their potential for fault-tolerant operations, topological quantum states are currently the focus of intense activity. Of particular interest are topological quantum error correction codes, such as the surface and planar stabilizer codes that a...
Stabilizing multiple topological fermions on a quantum computer
Jin Ming Koh, Tommy Tai, Yong Han Phee +2 more·Mar 23, 2021
In classical and single-particle settings, non-trivial band topology always gives rise to robust boundary modes. For quantum many-body systems, however, multiple topological fermions are not always able to coexist, since Pauli exclusion prevents addi...
Effect of constraint and Tabu Search term on Variational Quantum Eigensolver and Subspace-Search Variational Quantum Eigensolver
Hikaru Wakaura, T. Tomono·Mar 23, 2021
Subspace-Search Variational Quantum Eigensolver(SSVQE) is searching method of multiple states and relies on the unitarity of transformations to ensure the orthogonality of output states for multiple states. Therefore, this method is thought to be pro...
Quantum walk-based search algorithms with multiple marked vertices
G. A. Bezerra, P. Lugão, R. Portugal·Mar 23, 2021
The quantum walk is a powerful tool to develop quantum algorithms, which usually are based on searching for a vertex in a graph with multiple marked vertices, Ambainis's quantum algorithm for solving the element distinctness problem being the most sh...
Quantum Support Vector Machines for Continuum Suppression in B Meson Decays
J. Heredge, C. Hill, L. Hollenberg +1 more·Mar 23, 2021
Quantum computers have the potential to speed up certain computational tasks. A possibility this opens up within the field of machine learning is the use of quantum techniques that may be inefficient to simulate classically but could provide superior...
A universal quantum gate set for transmon qubits with strong ZZ interactions
J. Long, T. Zhao, M. Bal +13 more·Mar 23, 2021
Junling Long, ∗ Tongyu Zhao, † Mustafa Bal, Ruichen Zhao, George S. Barron, Hsiang-sheng Ku, Joel A. Howard, Xian Wu, Corey Rae H. McRae, Xiu-Hao Deng, Guilhem J. Ribeill, Meenakshi Singh, Thomas A. Ohki, Edwin Barnes, Sophia E. Economou, and David P...
Simulation of adiabatic quantum computing for molecular ground states.
Vladimir Kremenetski, Carlos Mejuto-Zaera, Stephen J. Cotton +1 more·Mar 22, 2021
Quantum computation promises to provide substantial speedups in many practical applications with a particularly exciting one being the simulation of quantum many-body systems. Adiabatic state preparation (ASP) is one way that quantum computers could ...
Parameter concentrations in quantum approximate optimization
V. Akshay, D. Rabinovich, E. Campos +1 more·Mar 22, 2021
The quantum approximate optimization algorithm (QAOA) has become a cornerstone of contemporary quantum applications development. In QAOA, a quantum circuit is trained -- by repeatedly adjusting circuit parameters -- to solve a problem. Several recent...
Approximate Equivalence Checking of Noisy Quantum Circuits
Xin Hong, M. Ying, Yuan Feng +2 more·Mar 22, 2021
We study the fundamental design automation problem of equivalence checking in the NISQ (Noisy Intermediate-Scale Quantum) computing realm where quantum noise is present inevitably. The notion of approximate equivalence of (possibly noisy) quantum cir...