Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Efficient classical computation of the neural tangent kernel of quantum neural networks
A. M. Hernandez, Davide Pastorello, Giacomo De Palma·Aug 6, 2025
We propose an efficient classical algorithm to estimate the Neural Tangent Kernel (NTK) associated with a broad class of quantum neural networks. These networks consist of arbitrary unitary operators belonging to the Clifford group interleaved with p...
Excising dead components in the surface code using minimally invasive alterations: A performance study
R. Mishmash, V. Kliuchnikov, J. Bello-Rivas +7 more·Aug 6, 2025
The physical implementation of a large-scale error-corrected quantum processor will necessarily need to mitigate the presence of defective (thereby"dead") physical components in its operation, for example, identified during bring-up of the device or ...
Challenges in Applying Variational Quantum Algorithms to Dynamic Satellite Network Routing
Phuc Hao Do, Tran Duc Le·Aug 6, 2025
Applying near-term variational quantum algorithms to the problem of dynamic satellite network routing represents a promising direction for quantum computing. In this work, we provide a critical evaluation of two major approaches: static quantum optim...
Fermionic-Adapted Shadow Tomography for dynamical correlation functions
Taehee Ko, Mancheon Han, Hyowon Park +1 more·Aug 5, 2025
Dynamical correlation functions are essential for characterizing the response of the quantum many-body systems to the external perturbation. As their calculation is classically intractible in general, quantum algorithms are promising in this aspect, ...
Characterizing noisy quantum computation with imperfectly addressed errors
Riddhi S. Gupta, Salini Karuvade, Kerstin Beer +2 more·Aug 5, 2025
Quantum protocols on hardware are subject to noise that prohibits performance. Protocols for addressing errors, such as error correction or error mitigation, may fail to combat errors in quantum computation if noise violates critical assumptions requ...
Path-Integral Formulation of Bosonic Markovian Open Quantum Dynamics with Monte Carlo stochastic trajectories using the Glauber-Sudarshan P, Wigner, and Husimi Q Functions and Hybrids
Toma Yoneya, Kazuya Fujimoto, Yuki Kawaguchi·Aug 4, 2025
The Monte Carlo (MC) trajectory sampling of stochastic differential equations (SDEs) based on the quasiprobabilities, such as the Glauber-Sudarshan P, Wigner, and Husimi Q functions, enables us to investigate bosonic open quantum many-body dynamics d...
Intermediate-temperature topological Uhlmann phase on IBM quantum computers
Christopher Mastandrea, Costin Iancu, Hao Guo +1 more·Aug 4, 2025
A spin-1 system can exhibit an intermediate-temperature topological regime with a quantized Uhlmann phase sandwiched by topologically trivial low- and high-temperature regimes. We present a quantum circuit consisting of system and ancilla qubits plus...
Co-Designed Reflective and Leaky-Waveguide Low-Pass Filter for Superconducting Circuits
L. Andersson, Benjamin Olsson, Simone Gasparinetti +1 more·Aug 4, 2025
A stepped-impedance low-pass filter with integrated hollow waveguide absorbers is presented. The filter combines low insertion loss in the passband with strong attenuation at high frequencies, making it well suited for superconducting quantum computi...
Designing lattice proteins with variational quantum algorithms
Hanna Linn, Lucas Knuthson, A. Irback +3 more·Aug 4, 2025
Quantum heuristics have shown promise in solving various optimization problems, including lattice protein folding. Equally relevant is the inverse problem, protein design, where one seeks sequences that fold to a given target structure. The latter pr...
Distributed fault-tolerant quantum memories over a 2xL array of qubit modules
Edwin Tham, Min Ye, Ilia Khait +2 more·Aug 3, 2025
We propose an architecture for a quantum memory distributed over a $2 \times L$ array of modules equipped with a cyclic shift implemented via flying qubits. The logical information is distributed across the first row of $L$ modules and quantum error ...
Hamiltonian simulation for nonlinear partial differential equation by Schrödingerization
Shoya Sasaki, Katsuhiro Endo, Mayu Muramatsu·Aug 3, 2025
Hamiltonian simulation is a fundamental algorithm in quantum computing that has attracted considerable interest owing to its potential to efficiently solve the governing equations of large-scale classical systems. Exponential speedup through Hamilt...
TensorHyper-VQC: A Tensor-Train-Guided Hypernetwork for Robust and Scalable Variational Quantum Computing
Jun Qi, Chao-Han Huck Yang, Pin-Yu Chen +1 more·Aug 1, 2025
Variational Quantum Computing (VQC) faces fundamental scalability barriers, primarily due to barren plateaus and sensitivity to quantum noise. To address these challenges, we introduce TensorHyper-VQC, a novel tensor-train (TT)-guided hypernetwork fr...
The Bose-Hubbard polaron from weak to strong coupling
Tom Hartweg, Tanul Gupta, Guido Pupillo·Aug 1, 2025
We investigate the zero-temperature properties of a mobile impurity immersed in a bath of bosonic particles confined to a square lattice. We analyze the regimes of attractive and repulsive coupling between the impurity and the bath particles for diff...
Inference of maximum parsimony phylogenetic trees with model-based classical and quantum methods
Jiawei Zhang, Yibo Chen, Yang Zhou +1 more·Aug 1, 2025
The maximum parsimony phylogenetic tree reconstruction problem is NP-hard, presenting a computational bottleneck for classical computing and motivating the exploration of emerging paradigms like quantum computing. To this end, we design three optimiz...
Quantum entanglement of Hawking-Partner modes in expanding cavities
José Manuel Montes-Armenteros, Javier Olmedo·Aug 1, 2025
This article investigates quantum entanglement generated within a one-dimensional cavity where one boundary undergoes prescribed acceleration, a setup designed to mimic aspects of Hawking radiation. We quantify quantum correlations using logarithmic ...
Q-Sylvan: A Parallel Decision Diagram Package for Quantum Computing
Sebastiaan Brand, A. Laarman·Aug 1, 2025
As physical realizations of quantum computers move closer towards practical applications, the need for tools to analyze and verify quantum algorithms grows. Among the algorithms and data structures used to tackle such problems, decision diagrams (DDs...
Truncation uncertainties for accurate quantum simulations of lattice gauge theories
Anthony N. Ciavarella, Siddharth Hariprakash, Jad C. Halimeh +1 more·Jul 31, 2025
The encoding of lattice gauge theories onto quantum computers requires a discretization of the gauge field's Hilbert space on each link, which presents errors with respect to the Kogut--Susskind limit. In the electric basis, Hilbert space fragmentati...
Swap Network Augmented Ansätze on Arbitrary Connectivity
Teodor Parella-Dilmé, Jakob S. Kottmann, Antonio Acín·Jul 31, 2025
Efficient parametrizations of quantum states are essential for trainable hybrid classical-quantum algorithms. A key challenge in their design consists in adapting to the available qubit connectivity of the quantum processor, which limits the capacity...
Enhanced Extrapolation-Based Quantum Error Mitigation Using Repetitive Structure in Quantum Algorithms
Boseon Kim, Wooyeong Song, Kwang-il Bae +2 more·Jul 31, 2025
Quantum error mitigation is a crucial technique for suppressing errors especially in noisy intermediate-scale quantum devices, enabling more reliable quantum computation without the overhead of full error correction. Zero-Noise Extrapolation (ZNE), w...
Search for $t\bar tt\bar tW$ Production at $\sqrt{s} = 13$ TeV Using a Modified Graph Neural Network at the LHC
Syed Haider Ali, A. Ahmad, Muhammad Saiel +1 more·Jul 31, 2025
The simultaneous production of four top quarks in association with a ($W$) boson at $(\sqrt{s} = 13)$ TeV is an rare SM process with a next-to-leading-order (NLO) cross-section of $(6.6^{+2.4}_{-2.6} {ab})$\cite{saiel}. Identifying this process in th...