Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Pulse-Level Scheduling of Quantum Circuits for Neutral-Atom Devices
R. Tsai, Henrique Silv'erio, L. Henriet·Jun 10, 2022
We show how a pulse-level implementation of the multi-qubit gates in neutral-atom device architectures allows for the simultaneous execution of singleand multi-qubit gates acting on overlapping sets of qubits, in a mechanism we name absorption. With ...
Impact of dynamics, entanglement and Markovian noise on the fidelity of few-qubit digital quantum simulation
M. D. Porter, I. Joseph·Jun 10, 2022
Quantum algorithms have been proposed to accelerate the simulation of the chaotic dynamical systems that are ubiquitous in the physics of plasmas. Quantum computers without error correction might even use noise to their advantage to calculate the Lya...
Efficient Quantum Circuit Design with a Standard Cell Approach, with an Application to Neutral Atom Quantum Computers
Evan E. Dobbs, J. Friedman, A. Paler·Jun 10, 2022
We design quantum circuits by using the standard cell approach borrowed from classical circuit design, which can speed up the layout of circuits with a regular structure. Our standard cells are general and can be used for all types of quantum circuit...
Multi-state quantum simulations via model-space quantum imaginary time evolution
T. Tsuchimochi, Yoohee Ryo, Siu Chung Tsang +1 more·Jun 9, 2022
We introduce the framework of model space into quantum imaginary time evolution (QITE) to enable stable estimation of ground and excited states using a quantum computer. Model-space QITE (MSQITE) propagates a model space to the exact one by retaining...
Resource Reduction in Multiplexed High-Dimensional Quantum Reed-Solomon Codes
S. Nishio, N. Piparo, M. Hanks +2 more·Jun 8, 2022
Quantum communication technologies will play an important role in quantum information processing in the near future as we network devices together. However, their implementation is still a challenging task due to both loss and gate errors. Quantum er...
Fault-tolerant circuit synthesis for universal fault-tolerant quantum computing
Yongsoo Hwang·Jun 6, 2022
We present a quantum circuit synthesis algorithm for implementing universal fault-tolerant quantum computing based on concatenated codes. To realize faulttolerant quantum computing, the faulttolerant quantum protocols should be transformed into execu...
A system design approach toward integrated cryogenic quantum control systems
M. Prathapan, P. Mueller, David Heim +8 more·Jun 6, 2022
In this paper, we provide a system level perspective on the design of control electronics for large scale quantum systems. Quantum computing systems with high-fidelity control and readout, coherent coupling, calibrated gates, and reconfigurable circu...
Fourier-based quantum signal processing
T. L. Silva, Lucas Borges, L. Aolita·Jun 6, 2022
Implementing general functions of operators is a powerful tool in quantum computation. It can be used as the basis for a variety of quantum algorithms including matrix inversion, real and imaginary-time evolution, and matrix powers. Quantum signal pr...
Near-term advances in quantum natural language processing
D. Widdows, Aaranya Alexander, D. Zhu +2 more·Jun 5, 2022
This paper describes experiments showing that some tasks in natural language processing (NLP) can already be performed using quantum computers, though so far only with small datasets. We demonstrate various approaches to topic classification. The fir...
Ternary Unitary Quantum Lattice Models and Circuits in 2+1 Dimensions.
Richard M. Milbradt, Lisa Scheller, C. Assmus +1 more·Jun 3, 2022
We extend the concept of dual unitary quantum gates introduced in Phys. Rev. Lett. 123, 210601 (2019)PRLTAO0031-900710.1103/PhysRevLett.123.210601 to quantum lattice models in 2+1 dimensions, by introducing and studying ternary unitary four-particle ...
Ideal refocusing of an optically active spin qubit under strong hyperfine interactions
Leon Zaporski, Noah Shofer, J. Bodey +14 more·Jun 2, 2022
Optically active semiconductor quantum dots have so far suffered from nuclear inhomogeneity limiting all dynamical decoupling measurements to a few microseconds. Lattice-matched GaAs–AlGaAs quantum dots now enable decoupling schemes to achieve a 0.11...
Improving Quantum Computation by Optimized Qubit Routing
Friedrich Wagner, Andreas Bärmann, F. Liers +1 more·Jun 2, 2022
In this work we propose a high-quality decomposition approach for qubit routing by swap insertion. This optimization problem arises in the context of compiling quantum algorithms formulated in the circuit model of computation onto specific quantum ha...
Simulating quantum circuits using tree tensor networks
Philipp Seitz, Ismael Medina, E. Cruz +2 more·Jun 2, 2022
We develop and analyze a method for simulating quantum circuits on classical computers by representing quantum states as rooted tree tensor networks. Our algorithm first determines a suitable, fixed tree structure adapted to the expected entanglement...
Quantum error mitigation by Pauli check sandwiching
Alvin Gonzales, Ruslan Shaydulin, Zain Saleem +1 more·Jun 1, 2022
We describe and analyze an error mitigation technique that uses multiple pairs of parity checks to detect the presence of errors. Each pair of checks uses one ancilla qubit to detect a component of the error operator and represents one layer of the t...
Quantum Algorithm for Higher-Order Unconstrained Binary Optimization and MIMO Maximum Likelihood Detection
Masaya Norimoto, R. Mori, Naoki Ishikawa·May 31, 2022
In this paper, we propose a quantum algorithm that supports a real-valued higher-order unconstrained binary optimization (HUBO) problem. This algorithm is based on the Grover adaptive search that originally supported HUBO with integer coefficients. N...
Accurate and Efficient Quantum Computations of Molecular Properties Using Daubechies Wavelet Molecular Orbitals: A Benchmark Study against Experimental Data
Chengyun Hong, Ting Tsai, J. Chou +8 more·May 28, 2022
Although quantum computation (QC) is regarded as a promising numerical method for computational quantum chemistry, current applications of quantum-chemistry calculations on quantum computers are limited to small molecules. This limitation can be ascr...
Quantum error mitigation via quantum-noise-effect circuit groups
Y. Hama, Hirofumi Nishi·May 27, 2022
Near-term quantum computers have been built as intermediate-scale quantum devices and are fragile against quantum noise effects, namely, NISQ devices. Traditional quantum-error-correcting codes are not implemented on such devices and to perform quant...
Quantum Optimal Control via Semi-Automatic Differentiation
M. H. Goerz, S. Carrasco, V. Malinovsky·May 27, 2022
We develop a framework of "semi-automatic differentiation" that combines existing gradient-based methods of quantum optimal control with automatic differentiation. The approach allows to optimize practically any computable functional and is implement...
Sample-efficient verification of continuously-parameterized quantum gates for small quantum processors
Ryan E Shaffer, Hang Ren, Emiliia Dyrenkova +7 more·May 25, 2022
Most near-term quantum information processing devices will not be capable of implementing quantum error correction and the associated logical quantum gate set. Instead, quantum circuits will be implemented directly using the physical native gate set ...
Optimal two-qubit gates in recurrence protocols of entanglement purification
Francesco Preti, T. Calarco, J. M. Torres +1 more·May 24, 2022
We propose and investigate a method to optimize recurrence entanglement purification protocols. The approach is based on a numerical search in the whole set of SU(4) matrices with the aid of a quasi-Newton algorithm. Our method evaluates average conc...