Photon localization: a comparative studyWe compare different measures for photon localization in terms of two-dimensional Gaussian wave packets. We find that all measures start to coalesce if the wave packet has evolved for times which are…Laura M. Ferguson, Ricardo Rojas Castellano, Kayla Oltman et al.·Aug 4, 2026SaveLearn
Quantum Contextuality and Entanglement-Free Grover Search in a Trapped-Ion Optical QuditQuantum computational advantage is generally attributed to coherent interference and other non-classical resources, yet their respective roles remain difficult to disentangle in experimental…Tarun Dutta, Jasper Phua Sing Cheng, Alex Jin et al.·Aug 4, 2026SaveLearn
Poled-fibre phase modulator for efficient high-dimensional quantum measurementsEfficient detection of quantum states underpins advanced device-independent quantum-information protocols that provide the ultimate level of security for tasks including quantum random number…Nayda Guerrero, Nelson Villalba, Gustavo H. dos Santos et al.·Aug 4, 2026SaveLearn
Reconstructing non-Abelian braiding and fusion without anyon transportNon-Abelian anyons offer a route to fault-tolerant and universal quantum computing, but experimental access to their defining braiding and fusion data remains limited by the resource overhead of…Lucy Byles, Matthew D. Horner, Benjamin T. H. Varcoe et al.·Aug 4, 2026SaveLearn
Contextuality in Sequential State DiscriminationGeneralized contextuality is known to be required in optimal strategies for quantum state discrimination protocols. More recently, sequential discrimination tasks have been studied; n players attempt…Nyan Raess, Farid Shahandeh·Aug 4, 2026SaveLearn
An optical-fibre-integrated buffer for packet-switched quantum networksPacket-switched quantum networks require buffers that can delay qubit payloads while routing information is read out in real time. Previous approaches have not provided this functionality in a fully…Daniel Spegel-Lexne, Joakim Argillander, Martin Clason et al.·Aug 4, 2026SaveLearn
Revealing Noise in Axial Motion Through Quantum Noise Spectroscopy on a Trapped Ion ProcessorNative noise processes in quantum processors are often difficult to isolate because multiple error mechanisms contribute to the same measured loss of coherence. Here we use dephasing-robust quantum…Vivian Maloney, Matthew Chow, Leigh Norris et al.·Aug 4, 2026SaveLearn
Quantum Many-Body Metrology of Rotation Sensing with Strong InteractionsWe study the ultimate quantum limit of rotation sensing with a few strongly interacting bosons confined in a quasi-one-dimensional ring trap with two weak links. It is demonstrated that a…Yong-Jun Baak, Uwe R. Fischer·Aug 4, 2026SaveLearn
Guiding Compiler Optimizations for Neutral Atom Quantum Computers Through VisualizationsThe scale of Neutral Atom (NA) quantum computers requires automated compilation tools. Designing the required heuristic methods demands a deep understanding of complex hardware trade-offs, for which…Yannick Stade, Robert Wille·Aug 4, 2026SaveLearn
Graph-Aware Exact Branch-and-Bound with Device Profiles for Static Qubit AllocationStatic qubit allocation maps a circuit's logical qubits to a sparse physical device while minimising an interaction-weighted physical-distance cost function, yielding a rectangular quadratic…Kamer Kaya·Aug 4, 2026SaveLearn
Unifying quantum measurement constructions via a relative-entropy minimum change principleThe minimum change principle provides an information-theoretic characterization of the Bayes reversal channel in classical probability theory and has recently been proposed as a framework for…Nana Liu, Mark M. Wilde·Aug 4, 2026SaveLearn
Non-Relativistic Quantum Electrodynamics of Atoms in a Rotating Ring CavityIn this paper, we derive a quantum optics model in a non-inertial rotating ring cavity from first principles. We begin with the Dirac equation in curved spacetime, add minimal coupling to the…Jarrod T. Reilly, Murray J. Holland·Aug 4, 2026SaveLearn
A lower bound on the classical simulation cost of star-network correlationsIt is well established that quantum strategies outperform classical ones in several communication tasks. We study the quantum communication complexity of correlations arising from joint measurements…Martin J. Renner·Aug 4, 2026SaveLearn
A quantum game of telephoneCharacterizing multinode quantum networks without ubiquitous local entanglement sources presents significant experimental challenges. We introduce ``quantum telephone,'' an iterative…Arefur Rahman, Matthew L. Stevens, Cory M. Nunn et al.·Aug 4, 2026SaveLearn
Separating quantum circuits from classical LLMsModern large language models - transformers and diffusion language models - are built around two canonical algorithmic tasks: prediction and generation. We prove unconditional separations between…Srinivasan Arunachalam, Arkopal Dutt, Hari Krovi et al.·Aug 4, 2026SaveLearn
Real-time decoding of quantum error correction codes using high-performance computingQuantum error correction (QEC) is indispensable for building scalable fault-tolerant quantum computers. Effective QEC demands stringent real-time decoding: the decoder must process syndrome…Lingling Lao, Qiang Wang, Yuanqi Liu et al.·Aug 4, 2026SaveLearn
Exact Tradeoff Between Quantum Error Correction and Quantum Darwinism: An Information-Theoretic No-Go TheoremQuantum error correction (QEC) and Quantum Darwinism describe opposing consequences of system-environment interactions: QEC seeks to preserve logical quantum information, whereas Quantum Darwinism…Arghya Maity, Kelvin Onggadinata, Teck Seng Koh·Aug 4, 2026SaveLearn
High-level quantum structured programs as quantum registers compositionsCurrent quantum programs are mainly designed at the level of quantum gates acting on individual qubits; on a large scale and for complex problems this may involve a high cognitive load on the…David Chamizo, Jose Garcia-Alonso, Juan M. Murillo·Aug 4, 2026SaveLearn
Few-photon degenerate parametric resonance in a two-tone driven microwave resonatorMulti-tone external driving offers a route to parametric physics without directly modulating the device. However, the validity of the parametric response in the few-photon regime remains…Orjan Ameye, Jakob Koenig, Clinton Potts et al.·Aug 4, 2026SaveLearn
Interplay between teleportation fidelity and basis-independent coherence in maximally sliced states under decoherenceThe influence of environmental decoherence on quantum teleportation is investigated by considering the three-qubit Maximally Sliced (MS) state as the shared entangled resource. Using the Kraus…Anushree Pandey, Sovik Roy·Aug 4, 2026SaveLearn
Geometric-Symmetry Logical Gate and Local-Probe Selectivity in the Three-Leg AKLT LadderSymmetry-protected topological (SPT) phases provide a platform for encoding quantum information in protected boundary degrees of freedom. Here we study the three-leg Affleck-Kennedy-Lieb-Tasaki…Jingnuo Han, Youning Li·Aug 4, 2026SaveLearn
CNOT-Distance is NP-complete under all-to-all connectivityGiven A∈GL(N,2) and an integer K, we ask whether A can be implemented by at most K CNOT gates on fixed labelled wires with all-to-all connectivity. We prove that this problem…Antonio Acuaviva, Arturo Acuaviva, Pablo Acuaviva·Aug 4, 2026SaveLearn
Impossibility of Perfectly Complete Many-Round Key Agreement in the QROMThis paper proves that it is impossible to construct perfectly complete quantum key agreement protocols (QKA) from quantumly secure one-way functions (OWFs) in a black-box manner. Specifically,…Longcheng Li, Qian Li, Xingjian Li et al.·Aug 4, 2026SaveLearn
Optimal and Deterministic Quantum Search on the Simplex of Complete GraphsThe simplex of complete graphs, also known as the first-order truncated simplex lattice, is a network of M+1 identical complete graphs, each with M vertices, such that each clique contains an…Kiyoji Huang Fujiwara, Yujia Shi, Thomas G. Wong·Aug 4, 2026SaveLearn
Uncovering Non-Gaussianity through Multi-Copy SymmetriesGaussian states are fundamental in continuous-variable quantum information, yet characterizing non-Gaussianity remains challenging due to the non-convexity of the Gaussian set. Existing witnesses…Hao Dai, Yue Zhang·Aug 4, 2026SaveLearn