Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Mid-Circuit Cavity Measurement in a Neutral Atom Array.
Emma Deist, Yue-Hui Lu, Jacquelyn Ho +4 more·May 27, 2022
Subsystem readout during a quantum process, or mid-circuit measurement, is crucial for error correction in quantum computation, simulation, and metrology. Ideal mid-circuit measurement should be faster than the decoherence of the system, high-fidelit...
Collisional S-matrix for the vibrational dynamics of H+H2 by quantum computing
Yulun Wang, P. Krstic·May 27, 2022
An algorithm and a system of quantum circuits are developed and applied to compute accurately the S matrix for the transitions between vibrational states of H2 for collisions with H. The algorithm was applied to 100 eV laboratory collision energy at ...
Interleaved Prange: A New Generic Decoder for Interleaved Codes
Anmoal Porwal, Lukas Holzbaur, Hedongliang Liu +3 more·May 27, 2022
Due to the recent challenges in post-quantum cryptography, several new approaches for code-based cryptography have been proposed. For example, a variant of the McEliece cryptosystem based on interleaved codes was proposed. In order to deem such new s...
Finding many Collisions via Reusable Quantum Walks
X. Bonnetain, A. Chailloux, A. Schrottenloher +1 more·May 27, 2022
Given a random function $f$ with domain $[2^n]$ and codomain $[2^m]$, with $m \geq n$, a collision of $f$ is a pair of distinct inputs with the same image. Collision finding is an ubiquitous problem in cryptanalysis, and it has been well studied usin...
Effect of matrix sparsity and quantum noise on quantum random walk linear solvers
Benwei Wu, Hrushikesh Patil, P. Krstic·May 27, 2022
We study the effects of quantum noise in hybrid quantum-classical solver for sparse systems of linear equations using quantum random walks, applied to stoquastic Hamiltonian matrices. In an ideal noiseless quantum computer, sparse matrices achieve so...
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...
Characterizing and mitigating coherent errors in a trapped ion quantum processor using hidden inverses
Swarnadeep Majumder, C. Yale, Titus Morris +6 more·May 27, 2022
Quantum computing testbeds exhibit high-fidelity quantum control over small collections of qubits, enabling performance of precise, repeatable operations followed by measurements. Currently, these noisy intermediate-scale devices can support a suffic...
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...
Comparing the Digital Annealer with Classical Evolutionary Algorithm
M. Ayodele·May 26, 2022
In more recent years, there has been increasing research interest in exploiting the use of application specific hardware for solving optimisation problems. Examples of solvers that use specialised hardware are IBM’s Quantum System One and D-wave’s Qu...
Avoiding Barren Plateaus with Classical Deep Neural Networks
Lucas Friedrich, J. Maziero·May 26, 2022
Variational quantum algorithms (VQAs) are among the most promising algorithms in the era of Noisy Intermediate Scale Quantum Devices. Such algorithms are constructed using a parameterization U($\pmb{\theta}$) with a classical optimizer that updates t...
Entanglement and coherence in the Bernstein-Vazirani algorithm
Moein Naseri, Tulja Varun Kondra, Suchetana Goswami +2 more·May 26, 2022
Quantum algorithms allow to outperform their classical counterparts in various tasks, most prominent example being Shor's algorithm for efficient prime factorization on a quantum computer. It is clear that one of the reasons for the speedup is the su...
Future Computer Systems and Networking Research in the Netherlands: A Manifesto
A. Iosup, F. Kuipers, A. Varbanescu +6 more·May 26, 2022
Our modern society and competitive economy depend on a strong digital foundation and, in turn, on sustained research and innovation in computer systems and networks (CompSys). With this manifesto, we draw attention to CompSys as a vital part of ICT. ...
Mitigating Barren Plateaus of Variational Quantum Eigensolvers
Xia Liu, Geng-yang Liu, Hao-Kai Zhang +2 more·May 26, 2022
Variational quantum algorithms (VQAs) are expected to establish valuable applications on near-term quantum computers. However, recent works have pointed out that the performance of VQAs greatly relies on the expressibility of the ansatzes and is seri...
Multi-objective QUBO solver: bi-objective quadratic assignment problem
M. Ayodele, R. Allmendinger, M. L'opez-Ib'anez +1 more·May 26, 2022
Quantum and quantum-inspired optimisation algorithms are designed to solve problems represented in binary, quadratic and unconstrained form. Combinatorial optimisation problems are therefore often formulated as Quadratic Unconstrained Binary Optimisa...
QSpeech: Low-Qubit Quantum Speech Application Toolkit
Zhenhou Hong, Jianzong Wang, Xiaoyang Qu +3 more·May 26, 2022
Quantum devices with low qubits are common in the Noisy Intermediate-Scale Quantum (NISQ) era. However, Quantum Neural Network (QNN) running on low-qubit quantum devices would be difficult since it is based on Variational Quantum Circuit (VQC), which...
On-chip spin-photon entanglement based on photon-scattering of a quantum dot
M. L. Chan, Alexey Tiranov, M. H. Appel +7 more·May 25, 2022
The realization of on-chip quantum interfaces between flying photons and solid-state spins is a key building block for quantum-information processors, enabling, e.g., distributed quantum computing, where remote quantum registers are interconnected by...
Efficient generation of entangled multiphoton graph states from a single atom
P. Thomas, L. Ruscio, O. Morin +1 more·May 25, 2022
The central technological appeal of quantum science resides in exploiting quantum effects, such as entanglement, for a variety of applications, including computing, communication and sensing1. The overarching challenge in these fields is to address, ...
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 ...
Simulation Complexity of Many-Body Localized Systems
Adam Ehrenberg, A. Deshpande, C. Baldwin +2 more·May 25, 2022
We use complexity theory to rigorously investigate the difficulty of classically simulating evolution under many-body localized (MBL) Hamiltonians. Using the defining feature that MBL systems have a complete set of quasilocal integrals of motion (LIO...
Simulating groundstate and dynamical quantum phase transitions on a superconducting quantum computer
J. Dborin, V. Wimalaweera, F. Barratt +3 more·May 25, 2022
The phenomena of quantum criticality underlie many novel collective phenomena found in condensed matter systems. They present a challenge for classical and quantum simulation, in part because of diverging correlation lengths and consequently strong f...