Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Heisenberg-Limited Quantum Hamiltonian Learning via Randomly Spread Product-States
Bora Baran, Timothy Heightman·Jul 28, 2025
We show how one can asymptotically reach the Heisenberg limit in quantum Hamiltonian learning without entanglement, globally coherent measurements, or dynamical control, using only local quantum operations. Our protocol uses ensemble-averaging over t...
Orthogonalization speed-up from quantum coherence after a sudden quench
Beatrice Donelli, Gabriele De Chiara, Francesco Scazza +1 more·Jul 28, 2025
We introduce a nonequilibrium phenomenon, reminiscent of Anderson's orthogonality catastrophe (OC), that arises in the transient dynamics following an interaction quench between a quantum system and a localized defect. Even if the system comprises on...
Construction and Rigorous Analysis of Quantum-Like States
Ethan Dickey, Abhijeet Vyas, Sabre Kais·Jul 28, 2025
Extending upon the observations of the emergence of quantum-like states from classical complex synchronized networks, this work adds mathematical rigor to the analysis of single Quantum-Like (QL) bits constructed by eigenvectors of the adjacency matr...
Robust qubit interactions mediated by photonic topological edge states
Boris Gurevich, Weihua Xie, Mohsen Yarmohammadi +1 more·Jul 28, 2025
We investigate the coupling of two spatially separated qubits via topologically protected edge states in a two-dimensional Hofstadter lattice. In this hybrid platform, the qubits are coupled to distinct edge sites of the lattice, enabling long-range ...
Witness High-Dimensional Quantum Steering via Majorization Lattice
Ma-Cheng Yang, Cong-Feng Qiao·Jul 28, 2025
Quantum steering enables one party to influence another remote quantum state by local measurement. While steering is fundamental to many quantum information tasks, the existing detection methods in the literature are mainly constrained to either spec...
Planckian bound on quantum dynamical entropy
Xiangyu Cao·Jul 28, 2025
We introduce a simplified version of Connes-Narnhofer-Thirring's quantum dynamical entropy for quantum systems. It quantifies the amount of information gained about the initial condition from continuously monitoring an observable. A nonzero entropy g...
On primordial matter production induced by spatial curvature in the early universe
V. E. Kuzmichev, V. V. Kuzmichev·Jul 28, 2025
In this note, it is shown that nonvanishing spatial curvature produces primordial matter in the initially empty universe due to quantum gravity effects. This matter decays faster than radiation and is described by a stiff equation of state. The quant...
(2,2)-GB Codes: Classification and Comparison with weight-4 Surface Codes
Franccois Arnault, Philippe Gaborit, Nicolas Saussay·Jul 28, 2025
Generalized Bicycle (GB) codes offer a compelling alternative to surface codes for quantum error correction. This paper focuses on (2,2)-Generalized Bicycle codes, constructed from pairs of binary circulant matrices with two non-zero elements per row...
On Post-Quantum Cryptography Authentication for Quantum Key Distribution
Juan Antonio Vieira Giestinhas, T. Spiller·Jul 28, 2025
The traditional way for a Quantum Key Distribution (QKD) user to join a quantum network is by authenticating themselves using pre-shared key material. While this approach is sufficient for small-scale networks, it becomes impractical as the network g...
A Novel Post-Quantum Secure Digital Signature Scheme Based on Neural Network
Satish Kumar, Md Arzoo Jamal·Jul 28, 2025
Digital signatures are fundamental cryptographic primitives that ensure the authenticity and integrity of digital documents. In the post-quantum era, classical public key-based signature schemes become vulnerable to brute-force and key-recovery attac...
Optimisation and synthesis of quantum circuits with global gates
Alejandro Villoria, Henning Basold, A. Laarman·Jul 28, 2025
Compiling quantum circuits to account for hardware restrictions is an essential part of the quantum computing stack. Circuit compilation allows us to adapt algorithm descriptions into a sequence of operations supported by real quantum hardware, and h...
Quantum Circuit Caches and Compressors for Low Latency, High Throughput Computing
Ioana Moflic, A. Robertson, S. Devitt +1 more·Jul 28, 2025
Utility-scale quantum programs contain operations on the order of $>10^{15}$ which must be prepared and piped from a classical co-processor to the control unit of the quantum device. The latency of this process significantly increases with the size o...
Alternative threshold function for Bayesian Optimization of Variational Quantum Circuits
Shreyas Dillon·Jul 28, 2025
In this paper, we propose an expansion of the Expected Maximum Improvement over Confident Regions (EMICoRe) Variational Quantum Eigensolver (VQE) -- a technique advanced by Nicoli et al., which utilizes both quantum and classical components to approx...
Quantum circuit evolutionary framework applied on set partitioning problem
B. Fernandez, R. Bloot, Marcelo A. Moret·Jul 28, 2025
Quantum algorithms are of great interest for their possible use in optimization problems. In particular, variational algorithms that use classical counterparts to optimize parameters hold promise for use in currently existing devices. However, conver...
The Augmented Tree Tensor Network Cookbook
Nora Reini'c, Luka Pavevsi'c, Daniel Jaschke +1 more·Jul 28, 2025
An augmented tree tensor network (aTTN) is a tensor network ansatz constructed by applying a layer of unitary disentanglers to a tree tensor network. The disentanglers absorb a part of the system's entanglement. This makes aTTNs suitable for simulati...
Quantum Portfolio Optimization with Expert Analysis Evaluation
Nouhaila Innan, Ayesha Saleem, Alberto Marchisio +1 more·Jul 28, 2025
Quantum algorithms have gained increasing attention for addressing complex combinatorial problems in finance, notably portfolio optimization. This study systematically benchmarks two prominent variational quantum approaches, Variational Quantum Eigen...
Benchmarking a Tunable Quantum Neural Network on Trapped-Ion and Superconducting Hardware
Djamil Lakhdar-Hamina, Xingxin Liu, Richard Barney +4 more·Jul 28, 2025
We implement a quantum generalization of a neural network on trapped-ion and IBM superconducting quantum computers to classify MNIST images, a common benchmark in computer vision. The network feedforward involves qubit rotations whose angles depend o...
Embedding-Aware Quantum-Classical SVMs for Scalable Quantum Machine Learning
S. A. C. Ord'onez, Luis Fernando Torres Torres, Mario Bifulco +3 more·Jul 28, 2025
Quantum Support Vector Machines face scalability challenges due to high-dimensional quantum states and hardware limitations. We propose an embedding-aware quantum-classical pipeline combining class-balanced k-means distillation with pretrained Vision...
Quantitative analysis of the effectiveness of mid-anneal measurement in quantum annealing
Keita Takahashi, Shu Tanaka·Jul 27, 2025
Quantum annealing is a promising metaheuristic for solving constrained combinatorial optimization problems. However, parameter tuning difficulties and hardware noise often prevent optimal solutions from being properly encoded as the ground states of ...
Tunneling photons pose no challenge to Bohmian mechanics
Yun-Fei Wang, Xiao-Yu Wang, Hui Wang·Jul 27, 2025
Very recently, Sharoglazova et al. performed an experiment measuring the energy-velocity relationship and Bohmian velocity in coupled waveguides. Their data show a discrepancy between the semi-classical `speed' $v=\sqrt{2|Δ|/m}$ and Bohmian velocity ...