Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Participation Ratio as a Quantum Probe of Hierarchical Stickiness
Ariel A. Galindo Duque, Miguel A. Prado Reynoso, Miguel Gonzalez +1 more·Feb 20, 2026
We investigate how quantum localization encodes the hierarchical stickiness that governs transport in mixed classical phase spaces. Using the periodically driven kicked top, we show that the participation ratio (PR) of coherent states in the Floquet ...
Qubit error bursts in superconducting quantum processors of Quantum Inspire: quasiparticle pumping and anomalous time dependence
G. R. Di Carlo, M. Samiotis, A. Kamlapure +9 more·Feb 20, 2026
We investigate qubit error bursts in 5- and 7-transmon processors of similar design, fabrication and packaging, but with different types of qubit Josephson junctions. Measurements for each are performed in two refrigerators to discern device-specific...
Bell-GHZ nonclassicality of many-observer interwoven frustrated down conversions
Marek Żukowski, Paweł Cieśliński, Marcin Markiewicz +1 more·Feb 20, 2026
Frustrated down conversion is a process in which a quantum superposition of emissions from two separate parametric down-conversion processes gives rise to observable interference. Depending on the phase relation between the probability amplitudes ass...
Theory and interpretability of Quantum Extreme Learning Machines: a Pauli-transfer matrix approach
Markus Gross, Hans-Martin Rieser·Feb 20, 2026
Quantum reservoir computers (QRCs) have emerged as a promising approach to quantum machine learning, since they utilize the natural dynamics of quantum systems for data processing and are simple to train. Here, we consider $n$-qubit quantum extreme l...
Towards scalable multi-qubit optimal control via interaction decomposition in the diagonal frame
Bora Baran, Tommaso Calarco, Matthias M. Mueller +1 more·Feb 20, 2026
In this work, we introduce a general n-qubit formulation of control objectives that allows a control target to be specified in a diagonal frame, so that only the diagonal entries must be characterized, thus quadratically reducing the complexity of th...
A systematic approach to answering the easy problems of consciousness based on an executable cognitive system
Qi Zhang·Feb 20, 2026
Consciousness is the window of the brain and reflects many fundamental cognitive properties involving both computational and cognitive mechanisms. A collection of these properties was described as the "easy problems" by Chalmers, including the abilit...
Quantum Maximum Likelihood Prediction via Hilbert Space Embeddings
Sreejith Sreekumar, Nir Weinberger·Feb 20, 2026
Recent works have proposed various explanations for the ability of modern large language models (LLMs) to perform in-context prediction. We propose an alternative conceptual viewpoint from an information-geometric and statistical perspective. Motivat...
Improving Single Excitation Fidelity in Rydberg Superatoms for Efficient Single Photon Emission
Vidisha Aggarwal, Boxi Li, Eloisa Cuestas +4 more·Feb 20, 2026
Deterministic single photon emission from a Rydberg ensemble coupled to an optical cavity requires high-fidelity preparation of collective single excitations. In such a setup imperfect Rydberg blockade can lead to unwanted double excitations, which d...
Quantum-enhanced phase sensitivity in an all-fiber Mach-Zehnder interferometer
Romain Dalidet, Sébastien Tanzilli, Gregory Sauder +3 more·Feb 20, 2026
Recent advances in quantum photonics have enabled increasingly robust protocols in optical phase estimation, achieving precisions beyond the standard quantum limit and approaching the Heisenberg limit. While intrinsic losses hinder the realization of...
Quantum-enhanced satellite image classification
Qi Zhang, Anton Simen, Carlos Flores-Garrigós +7 more·Feb 20, 2026
We demonstrate the application of a quantum feature extraction method to enhance multi-class image classification for space applications. By harnessing the dynamics of many-body spin Hamiltonians, the method generates expressive quantum features that...
A Fine-Grained and Efficient Reliability Analysis Framework for Noisy Quantum Circuits
Jindi Wu, Tianjie Hu, Qun Li·Feb 20, 2026
Evaluating the reliability of noisy quantum circuits is essential for implementing quantum algorithms on noisy quantum devices. However, current quantum hardware exhibits diverse noise mechanisms whose compounded effects make accurate and efficient r...
Universal Protection of Quantum States from Decoherence
Francesco Atzori, Salvatore Virzì, Francesco Devecchi +6 more·Feb 20, 2026
The fragility of quantum coherence fundamentally limits the scalability of quantum technologies, as unavoidable environmental interactions induce decoherence and rapidly degrade quantum properties. The Quantum Zeno Effect offers a powerful route to s...
Instability as a Quantum Resource
Goni Yoeli, Gilad Gour·Feb 20, 2026
We consolidate coherence, athermality, and nonuniformity as sub-resources within an underlying quantum resource theory: instability. We formulate instability axiomatically as the transient information within a decaying physical system. Specifying a d...
Impossibility of Refrigeration and Engine Operation in Minimal Qubit Repeated-Interaction Models
Gabrielle Barsky-Giles, Alessandro Prositto, Matthew Gerry +1 more·Feb 20, 2026
We investigate the operation of a qubit as a quantum thermal device within the repeated interaction framework, allowing for strong system-bath coupling and finite interaction times. We analyze two minimal models: an alternating-coupling setup, in whi...
Quantum stress and torsion distributions in the deuteron
Wim Cosyn, Adam Freese, Alan Sosa·Feb 20, 2026
Stress distributions in the deuteron are related to form factors of the asymmetric energy-momentum tensor through three-dimensional Fourier transforms. There are eleven such form factors, which we calculate in an impulse approximation. We compare the...
Higher-order spatial photon interference versus dipole blockade effect
Arthur Rotari, Mihai A. Macovei·Feb 20, 2026
The steady-state quantum dynamics of three dipole-dipole coupled two-level emitters, fixed at the vertices of an equilateral triangle, and interacting via the environmental thermostat is investigated. We have analytically obtained the populations of ...
Correlated phases of moat-band excitons in two-dimensional systems
L. Maisel Licerán, S. H. Boeve, H. T. C. Stoof·Feb 20, 2026
We study two-dimensional systems of interacting excitons with a moat dispersion, for which the ground-state energy manifold presents a ring of discrete or continuously degenerate minima around a single point in momentum space. At low densities, the e...
Spatial Phase Control of Energy and Ergotropy in Quantum Batteries
Maryam Hadipour, Soroush Haseli·Feb 20, 2026
We investigate the role of spatial geometry in controlling energy storage and work extraction in a non-Markovian quantum battery. The model consists of two identical two-level systems embedded in a structured waveguide environment, where one qubit ac...
High-Fidelity Teleportation of Continuous-Variable Quantum States Via Non-Ideal Qutrit Entangled Resources
Fatemeh Taghipoor, Mojtaba Golshani, Mostafa Motamedifar +1 more·Feb 20, 2026
Achieving near-unity fidelity in conventional continuous-variable quantum teleportation schemes based on two-mode squeezed vacuum states is fundamentally unattainable. To overcome this limitation, alternative approaches utilizing ensembles of two-dim...
Experimental realization of a photonic weighted graph state for quantum metrology
Unathi Skosana, Byron Alexander, Changhyoup Lee +1 more·Feb 20, 2026
Quantum metrology seeks to push the boundaries of measurement precision by harnessing quantum phenomena. Conventional methods often rely on maximally entangled resources, with states that are usually challenging to produce and sustain in practical se...