Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Integration of Cobalt Ferromagnetic Control Gates for Electrical and Magnetic Manipulation of Semiconductor Quantum Dots
F. Bersano, M. Aldeghi, N. Martinolli +6 more·Oct 21, 2024
The rise of electron spin qubit architectures for quantum computing processors has led to a strong interest in designing and integrating ferromagnets to induce stray magnetic fields for electron dipole spin resonance (EDSR). The integration of nanoma...
Cryogenic Control and Readout Integrated Circuits for Solid-State Quantum Computing
Lingxiao Lei, Heng Huang, Pingxing Chen +1 more·Oct 21, 2024
In the pursuit of quantum computing, solid-state quantum systems, particularly superconducting ones, have made remarkable advancements over the past two decades. However, achieving fault-tolerant quantum computing for next-generation applications nec...
Industry-compatible silicon spin-qubit unit cells exceeding 99% fidelity
P. Steinacker, N. Dumoulin Stuyck, W. H. Lim +26 more·Oct 21, 2024
Among the many types of qubit presently being investigated for a future quantum computer, silicon spin qubits with millions of qubits on a single chip are uniquely positioned to enable quantum computing. However, it has not been clear whether the out...
A Quantum Optimization Algorithm for Optimal Electric Vehicle Charging Station Placement for Intercity Trips
Tina Radvand, Alireza Talebpour·Oct 21, 2024
Electric vehicles (EVs) play a significant role in enhancing the sustainability of transportation systems. However, their widespread adoption is hindered by inadequate public charging infrastructure, particularly to support long-distance travel. Iden...
Near-Optimal Quantum Algorithm for Finding the Longest Common Substring between Run-Length Encoded Strings
Tzu-Ching Lee, Han-Hsuan Lin·Oct 21, 2024
We give a near-optimal quantum algorithm for the longest common substring (LCS) problem between two run-length encoded (RLE) strings, with the assumption that the prefix-sums of the run-lengths are given. Our algorithm costs $\tilde{\mathcal{O}}(n^{2...
Quantifying the advantages of applying quantum approximate algorithms to portfolio optimisation
Haomu Yuan, Christopher K. Long, H. Lepage +1 more·Oct 21, 2024
We present a quantum algorithm for portfolio optimisation. Specifically, We present an end-to-end quantum approximate optimisation algorithm to solve the discrete global minimum variance portfolio model. This model finds a portfolio of risky assets w...
Does quantum lattice sieving require quantum RAM?
Beomgeun Cho, Minki Hhan, Taehyun Kim +2 more·Oct 21, 2024
In this paper, we study the requirement for quantum random access memory (QRAM) in quantum lattice sieving, a fundamental algorithm for lattice-based cryptanalysis. First, we obtain a lower bound on the cost of quantum lattice sieving with a bounded ...
Engineering the Environment of a Superconducting Qubit with an Artificial Giant Atom
Jingjing Hu, Dengfeng Li, Yufan Qie +4 more·Oct 20, 2024
In quantum computing, precise control of system-environment coupling is essential for high-fidelity gates, measurements, and networking. We present an architecture that employs an artificial giant atom from waveguide quantum electrodynamics to tailor...
Assessing Quantum Extreme Learning Machines for Software Testing in Practice
Asmar Muqeet, Hassan Sartaj, Aitor Arrieta +6 more·Oct 20, 2024
Machine learning has been extensively applied for classical software testing activities such as test generation, minimization, and prioritization. Along the same lines, there has been interest in applying quantum machine learning to classical softwar...
A Hybrid Quantum Solver for the Lorenz System
S. F. Hafshejani, D. Gaur, Arundhati Dasgupta +3 more·Oct 20, 2024
We develop a hybrid classical–quantum method for solving the Lorenz system. We use the forward Euler method to discretize the system in time, transforming it into a system of equations. This set of equations is solved by using the Variational Quantum...
Quantum imaginary time evolution and UD-MIS problem
Victor A. Penas, Marcelo Losada, Pedro W. Lamberti·Oct 19, 2024
In this work we apply a procedure based on the quantum imaginary time evolution method to solve the unit-disk maximum independent set problem. Numerical simulations were performed for instances of 6, 8 and 10-qubits graphs. We have found that the fai...
Joint encryption and error correction for secure quantum communication
Nitin Jha, Abhishek Parakh, M. Subramaniam·Oct 19, 2024
Secure quantum networks are a bedrock requirement for developing a future quantum internet. However, quantum channels are susceptible to channel noise that introduce errors in the transmitted data. The traditional approach to providing error correcti...
Quantum-Classical Computing via Tensor Networks
Nathaniel Tornow, C. Mendl, Pramod Bhatotia·Oct 19, 2024
Circuit knitting offers a promising path to the scalable execution of large quantum circuits by breaking them into smaller sub-circuits whose output is recombined through classical postprocessing. However, current techniques face excessive overhead d...
LUCI in the Surface Code with Dropouts
Dripto M. Debroy, Matt McEwen, Craig Gidney +2 more·Oct 18, 2024
Recently, usage of detecting regions facilitated the discovery of new circuits for fault-tolerantly implementing the surface code. Building on these ideas, we present LUCI, a framework for constructing fault-tolerant circuits flexible enough to const...
Local Thermal Operations and Classical Communication
Rafał Bistroń, Jakub Czartowski·Oct 18, 2024
In quantum thermodynamics, understanding the interplay between locality, thermal constraints, and communication remains an open challenge. In this manuscript, we introduce Local Thermal Operations and Classical Communication (LTOCC), a novel operatio...
Nearly query-optimal classical shadow estimation of unitary channels
Zihao Li, Changhao Yi, You Zhou +1 more·Oct 18, 2024
Classical shadow estimation (CSE) is a powerful tool for learning the properties of quantum states and quantum processes. Here we consider the CSE task for quantum unitary channels. By querying an unknown unitary channel $\mathcal{U}$ multiple times ...
Explicit error bounds with commutator scaling for time-dependent product and multi-product formulas
Kaoru Mizuta, Tatsuhiko N. Ikeda, Keisuke Fujii·Oct 18, 2024
Product formula (PF), which approximates the time evolution under a many-body Hamiltonian by the product of local time evolution operators, is one of the central approaches for simulating quantum dynamics by quantum computers. It has been of great in...
Efficient charge-preserving excited state preparation with variational quantum algorithms
Zohim Chandani, Kazuki Ikeda, Zhong-Bo Kang +7 more·Oct 18, 2024
Determining the spectrum and wave functions of excited states of a system is crucial in quantum physics and chemistry. Low-depth quantum algorithms, such as the Variational Quantum Eigensolver (VQE) and its variants, can be used to determine the grou...
Quantum computation of SU(2) lattice gauge theory with continuous variables
Victor Ale, Nora M. Bauer, Raghav G. Jha +2 more·Oct 18, 2024
We present a quantum computational framework for pure SU(2) lattice gauge theory, using continuous variables instead of discrete qubits to represent the infinite-dimensional Hilbert space of the gauge fields. We consider a ladder as well as a two-dim...
Smolyak-algorithm-assisted robust control of quantum systems with uncertainties
Zigui Zhang, Z. Miao, Xiu-Hao Deng·Oct 18, 2024
Efficient and systematic numerical methods for robust control design are crucial in quantum systems due to inevitable uncertainties or disturbances. We propose a novel approach that models uncertainties as random variables and quantifies robustness u...