Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum state preparation and tomography of entangled mechanical resonators
E. Alex Wollack, A. Cleland, R. Gruenke +3 more·Oct 14, 2021
Precisely engineered mechanical oscillators keep time, filter signals and sense motion, making them an indispensable part of the technological landscape of today. These unique capabilities motivate bringing mechanical devices into the quantum domain ...
Near optimal sample complexity for matrix and tensor normal models via geodesic convexity
Cole Franks, Rafael Oliveira, Akshay Ramachandran +1 more·Oct 14, 2021
The matrix normal model, i.e., the family of Gaussian matrix-variate distributions whose covariance matrices are the Kronecker product of two lower dimensional factors, is frequently used to model matrix-variate data. The tensor normal model generali...
Scalable and robust quantum computing on qubit arrays with fixed coupling
Nguyen H. Le, Max Cykiert, E. Ginossar·Oct 14, 2021
We propose a scheme for scalable and robust quantum computing on two-dimensional arrays of qubits with fixed longitudinal coupling. This opens the possibility for bypassing the device complexity associated with tunable couplers required in convention...
Automatic generation of Grover quantum oracles for arbitrary data structures
Raphael Seidel, Colin Kai-Uwe Becker, Sebastian Bock +3 more·Oct 14, 2021
The steadily growing research interest in quantum computing—together with the accompanying technological advances in the realization of quantum hardware—fuels the development of meaningful real-world applications, as well as implementations for well-...
Evaluation on Genetic Algorithms as an optimizer of Variational Quantum Eigensolver(VQE) method
Hikaru Wakaura, T. Tomono, Shoya Yasuda·Oct 14, 2021
Variational-Quantum-Eigensolver(VQE) method on a quantum computer is a well-known hybrid algorithm to solve the eigenstates and eigenvalues that uses both quantum and classical computers. This method has the potential to solve quantum chemical simula...
A Theory of Quantum Subspace Diagonalization
Ethan N. Epperly, Lin Lin, Y. Nakatsukasa·Oct 14, 2021
Quantum subspace diagonalization methods are an exciting new class of algorithms for solving large\rev{-}scale eigenvalue problems using quantum computers. Unfortunately, these methods require the solution of an ill-conditioned generalized eigenvalue...
Large scale multi-node simulations of $\mathbb{Z}_2$ gauge theory quantum circuits using Google Cloud Platform
Erik J. Gustafson, B. Holzman, J. Kowalkowski +14 more·Oct 14, 2021
Simulating quantum field theories on a quantum computer is one of the most exciting fundamental physics applications of quantum information science. Dynamical time evolution of quantum fields is a challenge that is beyond the capabilities of classica...
Demonstration of the rodeo algorithm on a quantum computer
Zhengrong Qian, Jacob Watkins, Gabriel Given +3 more·Oct 14, 2021
The rodeo algorithm is an efficient algorithm for eigenstate preparation and eigenvalue estimation for any observable on a quantum computer. This makes it a promising tool for studying the spectrum and structure of atomic nuclei as well as other fiel...
Observability of fidelity decay at the Lyapunov rate in few-qubit quantum simulations
M. D. Porter, I. Joseph·Oct 14, 2021
In certain regimes, the fidelity of quantum states will decay at a rate set by the classical Lyapunov exponent. This serves both as one of the most important examples of the quantum-classical correspondence principle and as an accurate test for the p...
Characterizing Quantum Instruments: From Nondemolition Measurements to Quantum Error Correction
R. Stricker, D. Vodola, A. Erhard +7 more·Oct 13, 2021
In quantum information processing quantum operations are often processed alongside measurements which result in classical data. Due to the information gain of classical measurement outputs non-unitary dynamical processes can take place on the system,...
Applying quantum approximate optimization to the heterogeneous vehicle routing problem
David Fitzek, Toheed Ghandriz, L. Laine +2 more·Oct 13, 2021
Quantum computing offers new heuristics for combinatorial problems. With small- and intermediate-scale quantum devices becoming available, it is possible to implement and test these heuristics on small-size problems. A candidate for such combinatoria...
Integrated programmable controlled phase gate design for quantum information processing
Y. Başay, S. Kocaman·Oct 13, 2021
An integrated programmable controlled-phase (CPHASE) gate has been proposed for quantum information processing applications. This gate can introduce arbitrary phase difference to the target qubit in the case of the control qubit being in the state of...
Provably accurate simulation of gauge theories and bosonic systems
Yu Tong, Victor V. Albert, J. McClean +2 more·Oct 13, 2021
Quantum many-body systems involving bosonic modes or gauge fields have infinite-dimensional local Hilbert spaces which must be truncated to perform simulations of real-time dynamics on classical or quantum computers. To analyze the truncation error, ...
The Complexity of Bipartite Gaussian Boson Sampling
D. Grier, D. Brod, J. Arrazola +2 more·Oct 13, 2021
Gaussian boson sampling is a model of photonic quantum computing that has attracted attention as a platform for building quantum devices capable of performing tasks that are out of reach for classical devices. There is therefore significant interest,...
Unsupervised learning of correlated quantum dynamics on disordered lattices
Miri Kenig, Y. Lahini·Oct 13, 2021
Quantum particles co-propagating on disordered lattices develop complex non-classical correlations due to an interplay between quantum statistics, inter-particle interactions, and disorder. Here we present a deep learning algorithm based on Generativ...
Nearly Optimal Quantum Algorithm for Generating the Ground State of a Free Quantum Field Theory
Mohsen Bagherimehrab, Y. Sanders, D. Berry +2 more·Oct 12, 2021
We devise a quasilinear quantum algorithm for generating an approximation for the ground state of a quantum field theory (QFT). Our quantum algorithm delivers a super-quadratic speedup over the state-of-the-art quantum algorithm for ground-state gene...
Transferring quantum information between a quantum system with limited control and a quantum computer
Ryosuke Sakai, A. Soeda, M. Murao·Oct 12, 2021
We consider a hybrid quantum system consisting of a qubit system continuously evolving according to its fixed own Hamiltonian and a quantum computer. The qubit system couples to a quantum computer through a fixed interaction Hamiltonian, which can on...
TFermion: A non-Clifford gate cost assessment library of quantum phase estimation algorithms for quantum chemistry
Pablo Antonio Moreno Casares, Roberto Campos, M. Martin-Delgado·Oct 12, 2021
Quantum Phase Estimation is one of the most useful quantum computing algorithms for quantum chemistry and as such, significant effort has been devoted to designing efficient implementations. In this article, we introduce TFermion, a library designed ...
Controller-Based Energy-Aware Wireless Sensor Network Routing Using Quantum Algorithms
Jie Chen, Prasanna Date, N. Chancellor +2 more·Oct 12, 2021
Energy-efficient routing in wireless sensor networks has attracted attention from researchers in both academia and industry, most recently motivated by the opportunity to use software-defined network-inspired approaches. These problems are NP-hard, w...
A scalable and fast artificial neural network syndrome decoder for surface codes
S. Gicev, L. Hollenberg, M. Usman·Oct 12, 2021
Surface code error correction offers a highly promising pathway to achieve scalable fault-tolerant quantum computing. When operated as stabilizer codes, surface code computations consist of a syndrome decoding step where measured stabilizer operators...