Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Benchmarking of quantum fidelity kernels for Gaussian process regression
Xuyang Guo, J. Dai, R. Krems·Jul 22, 2024
Quantum computing algorithms have been shown to produce performant quantum kernels for machine-learning classification problems. Here, we examine the performance of quantum kernels for regression problems of practical interest. For an unbiased benchm...
An Exponential Mixing Condition for Quantum Channels
A. Souissi, A. Barhoumi·Jul 22, 2024
Quantum channels, pivotal in information processing, describe transformations within quantum systems and enable secure communication and error correction. Ergodic and mixing properties elucidate their behavior. In this paper, we establish a sufficien...
A Nanomechanical Atomic Force Qubit
Shahin Jahanbani, Zi-Huai Zhang, Bin Hua +5 more·Jul 22, 2024
Silicon nanomechanical resonators display ultra-long lifetimes at cryogenic temperatures and microwave frequencies. Achieving quantum control of single-phonons in these devices has so far relied on nonlinearities enabled by coupling to ancillary qubi...
Emulating quantum computing with optical matrix multiplication
Mwezi Koni, Hadrian Bezuidenhout, I. Nape·Jul 19, 2024
Optical computing harnesses the speed of light to perform vector-matrix operations efficiently. It leverages interference, a cornerstone of quantum computing algorithms, to enable parallel computations. In this work, we interweave quantum computing w...
Barycentric bounds on the error exponents of quantum hypothesis exclusion
Kaiyuan Ji, Hemant K. Mishra, Milán Mosonyi +1 more·Jul 18, 2024
Quantum state exclusion is an operational task with application to ontological interpretations of quantum states. In such a task, one is given a system whose state is randomly selected from a finite set, and the goal is to identify a state from the s...
Multi-stage tomography based on eigenanalysis for high-dimensional dense unitary processes in gate-based quantum computers
Y. Deville, A. Deville·Jul 18, 2024
Quantum Process Tomography (QPT) methods aim at identifying, i.e. estimating, a quantum process. QPT is a major quantum information processing tool, since it especially allows one to experimentally characterize the actual behavior of quantum gates, t...
Unruh-DeWitt Quantum Computing: Realizing Quantum Shannon Theory With Quantum Fields
Eric W. Aspling·Jul 18, 2024
Qubit-field quantum transduction provides numerous advantages to quantum computing, such as device-specific error-correcting codes, efficient scalability, and effective entanglement generation. An all-to-all connected bus of qubits implanted around t...
Quantum natural stochastic pairwise coordinate descent
Mohammad Aamir Sohail, Mohsen Heidari, S. Pradhan·Jul 18, 2024
Variational quantum algorithms, optimized using gradient-based methods, often exhibit sub-optimal convergence performance due to their dependence on Euclidean geometry. Quantum natural gradient descent (QNGD) is a more efficient method that incorpora...
A Security Assessment tool for Quantum Threat Analysis
Basel Halak, Cristian Sebastian Csete, Edward Joyce +5 more·Jul 18, 2024
The rapid advancement of quantum computing poses a significant threat to many current security algorithms used for secure communication, digital authentication, and information encryption. A sufficiently powerful quantum computer could potentially ex...
Hardware-efficient stabilization of entanglement via engineered dissipation in superconducting circuits
Changling Chen, Kai Tang, Yuxuan Zhou +8 more·Jul 18, 2024
Generation and preservation of quantum entanglement are among the primary tasks in quantum information processing. State stabilization via quantum bath engineering offers a resource-efficient approach to achieve this objective. However, current metho...
SHARC-VQE: Simplified Hamiltonian approach with refinement and correction enabled variational quantum eigensolver for molecular simulation.
Harshdeep Singh, Sonjoy Majumder, Sabyashachi Mishra·Jul 17, 2024
Quantum computing is finding increasingly more applications in quantum chemistry, particularly to simulate electronic structure and molecular properties of simple systems. The transformation of a molecular Hamiltonian from the fermionic space to the ...
Tutorial on Quantum Error Correction for 2024 Quantum Information Knowledge (QuIK) Workshop
P. Nadkarni, Narayanan Rengaswamy, Bane Vasi'c·Jul 17, 2024
We provide a brief review of the fundamentals of quantum computation and quantum error correction for the participants of the first Quantum Information Knowledge (QuIK) workshop at the 2024 IEEE International Symposium on Information Theory (ISIT 202...
Quantum and Classical Dynamics with Random Permutation Circuits
B. Bertini, Katja Klobas, Pavel Kos +1 more·Jul 16, 2024
Understanding thermalization in quantum many-body systems is among the most enduring problems in modern physics. A particularly interesting question concerns the role played by quantum mechanics in this process, i.e., whether thermalization in quantu...
Dissipationless topological quantum computation for Majorana objects in the sparse-dense mixed encoding process
Ye-Min Zhan, Guan-Dong Mao, Yu-Ge Chen +2 more·Jul 16, 2024
Topological quantum computation based on Majorana objects is subject to a significant challenge because at least some of the two-qubit quantum gates rely on the fermion (either charge or spin) parity of the qubits. This dependency renders the quantum...
Improve Variational Quantum Eigensolver by Many-Body Localization
Li Xin, Zhang-qi Yin·Jul 16, 2024
Variational quantum algorithms have been widely demonstrated in both experimental and theoretical contexts to have extensive applications in quantum simulation, optimization, and machine learning. However, the exponential growth in the dimension of t...
Microscopic parametrizations for gate set tomography under coloured noise
P. Vinas, A. Bermudez·Jul 16, 2024
Gate set tomography (GST) allows for a self-consistent characterization of noisy quantum information processors (QIPs). The standard approach treats QIPs as black boxes only constrained by the laws of physics, attaining full generality at a considera...
Quantum control of an oscillator with a Kerr-cat qubit
Andy Z Ding, Benjamin L. Brock, A. Eickbusch +10 more·Jul 15, 2024
Bosonic codes offer a hardware-efficient strategy for quantum error correction by redundantly encoding quantum information in the large Hilbert space of a harmonic oscillator. However, experimental realizations of these codes are often limited by anc...
Building holographic code from the boundary
Wei Wang·Jul 14, 2024
Holographic quantum error-correcting code, the quantum-information structure hypothesized for the AdS/CFT correspondence, has being attracting increasing attention in new directions interrelating the studies of quantum gravity and quantum simulation....
A novel quantum realization of jet clustering in high-energy physics experiments.
Yongfeng Zhu, Weifeng Zhuang, Chen Qian +4 more·Jul 12, 2024
Exploring the application of quantum technologies to fundamental sciences holds the key to fostering innovation for both sides. In high-energy particle collisions, quarks and gluons are produced and immediately form collimated particle sprays known a...
Approximate Unitary $k$-Designs from Shallow, Low-Communication Circuits
Nicholas LaRacuente, Felix Leditzky·Jul 10, 2024
Random unitaries are useful in quantum information and related fields, but hard to generate with limited resources. An approximate unitary $k$-design is an ensemble of unitaries with an underlying measure over which the average is close to a Haar ran...