Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Programmable Hamiltonian engineering with quadratic quantum Fourier transform
Pei Wang, Zhi-Hao Huang, Xingze Qiu +1 more·Apr 9, 2022
Quantum Fourier transform (QFT) is a widely used building block for quantum algorithms, whose scalable implementation is challenging in experiments. Here, we propose a protocol of quadratic quantum Fourier transform (QQFT), considering cold atoms con...
The entropy cones of $W_N$ and $W_N^d$ states
H. Schnitzer·Apr 9, 2022
: The quantum entropy cones (QEC) for W N states of qubits and W dN states of qudits are computed. These cones emerge as symmetrized quantum entropy cones (SQEC) for arbitrary N and d . Directed graph models are presented which describe the SQEC for ...
QuiKo: A Quantum Beat Generation Application
Scott Oshiro·Apr 9, 2022
Artificial intelligent (AI) music generation systems have been exciting developments in machine and deep learning, but are limited to the data set(s) that they are fed. As a result, these systems lack a sense of organicness, or intuition, in their re...
Quantum machine learning framework for virtual screening in drug discovery: a prospective quantum advantage
Stefano Mensa, E. Şahin, F. Tacchino +2 more·Apr 8, 2022
Machine Learning for ligand based virtual screening (LB-VS) is an important in-silico tool for discovering new drugs in a faster and cost-effective manner, especially for emerging diseases such as COVID-19. In this paper, we propose a general-purpose...
Gravitational-wave matched filtering on a quantum computer
D. Veske, Cenk Tüysüz, Mirko Amico +6 more·Apr 8, 2022
State-of-the-art quantum computers have very limited applicability for accurate calculations. Here, we report the first experimental demonstration of qubit-based matched filtering for a detection of the gravitational-wave signal from a binary black h...
Limitations of Variational Quantum Algorithms: A Quantum Optimal Transport Approach
G. Palma, M. Marvian, Cambyse Rouz'e +1 more·Apr 7, 2022
The impressive progress in quantum hardware in the last years has raised the interest of the quantum computing community in harvesting the computational power of such devices. However, in the absence of error correction, these devices can only reliab...
Polynomial-time quantum algorithm for solving the hidden subgroup problem
Hefeng Wang·Apr 7, 2022
The hidden subgroup problem~(HSP) is one of the most important problems in quantum computation. Many problems for which quantum algorithm achieves exponential speedup over its classical counterparts can be reduced to the Abelian HSP. However, there i...
Demonstration of a Quantum Gate Using Electromagnetically Induced Transparency.
K. McDonnell, L. Keary, J. Pritchard·Apr 7, 2022
We demonstrate a native CNOT gate between two individually addressed neutral atoms based on electromagnetically induced transparency. This protocol utilizes the strong long-range interactions of Rydberg states to enable conditional state transfer on ...
Two-qubit gate using conditional driving for highly detuned Kerr nonlinear parametric oscillators
Hiroomi Chono, T. Kanao, Hayato Goto·Apr 7, 2022
A Kerr-nonlinear parametric oscillator (KPO) is one of the promising devices to realize qubits for universal quantum computing. The KPO can stabilize two coherent states with opposite phases, yielding a quantum superposition called a Schr\"{o}dinger ...
Robust Directional Couplers for State Manipulation in Silicon Photonic-Integrated Circuits
M. Katzman, Y. Piasetzky, Evyatar Rubin +5 more·Apr 7, 2022
Photonic integrated circuits play a central role in current and future applications such as communications, sensing, ranging, and information processing. Photonic quantum computing will also likely require an integrated optics architecture for improv...
Quantum Simulation for High-Energy Physics
Christian W. Bauer. Zohreh Davoudi, A. Balantekin, Tanmoy Bhattacharya +27 more·Apr 7, 2022
It is for the first time that Quantum Simulation for High Energy Physics (HEP) is studied in the U.S. decadal particle-physics community planning, and in fact until recently, this was not considered a mainstream topic in the community. This fact spea...
Variational dynamics as a ground-state problem on a quantum computer
Stefano Barison, Filippo Vicentini, I. Cirac +1 more·Apr 7, 2022
We propose a variational quantum algorithm to study the real time dynamics of quantum systems as a ground-state problem. The method is based on the original proposal of Feynman and Kitaev to encode time into a register of auxiliary qubits. We prepare...
Reconstructing Bayesian Networks on a Quantum Annealer
Enrico Zardini, Massimo Rizzoli, Sebastiano Dissegna +2 more·Apr 7, 2022
Bayesian networks are widely used probabilistic graphical models, whose structure is hard to learn starting from the generated data. O'Gorman et al. have proposed an algorithm to encode this task, i.e., the Bayesian network structure learning (BNSL),...
Quantum variational learning for quantum error-correcting codes
Chenfeng Cao, Chao-Ni Zhang, Zipeng Wu +2 more·Apr 7, 2022
Quantum error correction is believed to be a necessity for large-scale fault-tolerant quantum computation. In the past two decades, various constructions of quantum error-correcting codes (QECCs) have been developed, leading to many good code familie...
Covariance matrix preparation for quantum principal component analysis
Max Hunter Gordon, M. Cerezo, L. Cincio +1 more·Apr 7, 2022
Principal component analysis (PCA) is a dimensionality reduction method in data analysis that involves diagonalizing the covariance matrix of the dataset. Recently, quantum algorithms have been formulated for PCA based on diagonalizing a density matr...
Convex Optimization for Nonequilibrium Steady States on a Hybrid Quantum Processor.
J. Lau, K. H. Lim, Kishor Bharti +2 more·Apr 7, 2022
Finding the transient and steady state properties of open quantum systems is a central problem in various fields of quantum technologies. Here, we present a quantum-assisted algorithm to determine the steady states of open system dynamics. By reformu...
Quantum Approximate Counting for Markov Chains and Application to Collision Counting
Franccois Le Gall, Iu-Iong Ng·Apr 6, 2022
In this paper we show how to generalize the quantum approximate counting technique developed by Brassard, H{\o}yer and Tapp [ICALP 1998] to a more general setting: estimating the number of marked states of a Markov chain (a Markov chain can be seen a...
Optimization of Quantum Read-Only Memory Circuits
Koustubh Phalak, M. Alam, Abdullah Ash-Saki +2 more·Apr 6, 2022
Quantum computing is a rapidly expanding field with applications ranging from optimization all the way to complex machine learning tasks. Quantum memories, while lacking in practical quantum computers, have the potential to bring quantum advantage. I...
Accelerated Quantum Adiabatic Transfer in Superconducting Qubits
Wen Zheng, Jianwen Xu, Zhimin Wang +4 more·Apr 6, 2022
Quantum adiabatic transfer is widely used in quantum computation and quantum simulation. However, the transfer speed is limited by the quantum adiabatic approximation condition, which hinders its application in quantum systems with a short decoherenc...
Adiabatic quantum algorithm for artificial graphene
A. P'erez-Obiol, Adri'an P'erez-Salinas, Sergio S'anchez-Ram'irez +2 more·Apr 6, 2022
We devise a quantum-circuit algorithm to solve the ground state and ground energy of artificial graphene. The algorithm implements a Trotterized adiabatic evolution from a purely tight-binding Hamiltonian to one including kinetic, spin-orbit and Coul...